<filename>bot/utils/blurple_formatter.py<gh_stars>10-100
import ast
from collections.abc import Generator
from random import randrange

MAX_LINE_LENGTH = 50

op_strs = {
    ast.Add: "+",
    ast.Mult: "*",
    ast.Sub: "-",
    ast.Div: "/",
    ast.FloorDiv: "//",
    ast.Mod: "%",
    ast.Pow: "**",
    ast.BitXor: "^",
    ast.BitOr: "|",
    ast.BitAnd: "&",
    ast.LShift: "<<",
    ast.RShift: ">>",
    ast.Invert: "~",
    ast.Not: "not",
    ast.UAdd: "+",
    ast.USub: "-",
    ast.Eq: "==",
    ast.NotEq: "!=",
    ast.Lt: "<",
    ast.LtE: "<=",
    ast.Gt: ">",
    ast.GtE: ">=",
    ast.Is: "is",
    ast.IsNot: "is not",
    ast.In: "in",
    ast.NotIn: "not in",
    ast.And: "and",
    ast.Or: "or",
}

# Operator precedence table
precedences = [
    {
        ast.Name,
        ast.Constant,
        ast.JoinedStr,
        ast.List,
        ast.ListComp,
        ast.Dict,
        ast.DictComp,
        ast.Set,
        ast.SetComp,
        ast.Tuple,
        ast.GeneratorExp,
    },
    {ast.Subscript, ast.Call, ast.Attribute},
    {ast.Await},
    {ast.Pow},
    {ast.UAdd, ast.USub, ast.Invert},
    {ast.Mult, ast.MatMult, ast.Div, ast.FloorDiv, ast.Mod},
    {ast.Add, ast.Sub},
    {ast.LShift, ast.RShift},
    {ast.BitAnd},
    {ast.BitXor},
    {ast.BitOr},
    {
        ast.In,
        ast.NotIn,
        ast.Is,
        ast.IsNot,
        ast.Lt,
        ast.LtE,
        ast.Gt,
        ast.GtE,
        ast.NotEq,
        ast.Eq,
    },
    {ast.Not},
    {ast.And},
    {ast.Or},
    {ast.IfExp},
    {ast.Lambda},
    {ast.NamedExpr},
]
precedences = {op: i for i, ops in enumerate(precedences[::-1]) for op in ops}


# Right associative operators
r_assoc = {ast.Pow}

# Statements which can have a semicolon after them
semicolon_able = (
    ast.AnnAssign,
    ast.Assert,
    ast.Assign,
    ast.AugAssign,
    ast.Break,
    ast.Continue,
    ast.Delete,
    ast.Expr,
    ast.Global,
    ast.Import,
    ast.ImportFrom,
    ast.Nonlocal,
    ast.Pass,
    ast.Raise,
    ast.Return,
)

# Operators for which the newline goes before
nl_before_op = {ast.Add, ast.Mult}


def get_precedence(node: ast.AST) -> int:
    """Get the precedence of the given node."""
    if isinstance(node, (ast.BoolOp, ast.BinOp, ast.UnaryOp)):
        return precedences[type(node.op)]
    if isinstance(node, ast.Compare):
        return precedences[type(node.ops[0])]
    return precedences.get(type(node), 0)


def space(a: int = 1, b: int = 3) -> str:
    """Randomly generate whitespace of length between the given bounds."""
    return " " * randrange(a, b)


def num_spaces(src: str) -> int:
    """Count the number of spaces at the beginning of the string."""
    return len(src) - len(src.lstrip())


def invert_indents(src: str) -> str:
    """
    Invert the indentation on each line of the given string.

    Lines with the maximum indentation become least indented, and vice versa.
    """
    lines = src.splitlines()
    max_spaces = max(num_spaces(line) for line in lines)
    return "\n".join(
        (max_spaces - num_spaces(line)) * " " + line.lstrip() for line in lines
    )


def parenthesize(node: ast.AST, _nl_able: bool = False) -> str:
    """Wrap the un-parsed node in parentheses."""
    return f"({unparse(node, True)})"


def indent(nodes: list[ast.AST], n: int) -> Generator[str, None, None]:
    """
    Indent each line of the un-parsed nodes by the given number of spaces.

    Multiple nodes are put on the same line, separated by semicolons, if possible
    until they hit the line length limit.
    """
    curr_chunk = []
    curr_len = 0
    for stmt in nodes:
        stmt_lines = unparse(stmt).splitlines()
        if isinstance(stmt, semicolon_able):
            for line in stmt_lines:
                curr_chunk.append(line)
                curr_len += len(line)
                if curr_len > MAX_LINE_LENGTH or curr_chunk[-1][-1] != ";":
                    yield n * " " + space().join(curr_chunk)
                    curr_len = 0
                    curr_chunk = []
        else:
            yield n * " " + space().join(curr_chunk)
            yield from (f"{n * ' '}{line}" for line in stmt_lines)
            curr_len = 0
            curr_chunk = []

    if curr_chunk:
        yield n * " " + space().join(curr_chunk)


def unparse(node: ast.AST, nl_able: bool = False) -> str:
    """Convert the ast node to formatted(!) Python source code."""
    if isinstance(node, ast.AnnAssign):
        target, annotation, value = node.target, node.annotation, node.value

        return (
            f"{unparse(target)}{space()}:{space()}{unparse(annotation)}"
            + (f"{space()}={space()}{unparse(value)}" if value else "")
            + f"{space()};"
        )
    if isinstance(node, ast.Assert):
        test, msg = node.test, node.msg

        return (
            f"assert{space(1)}{unparse(test)}"
            + (f",{space()}{unparse(msg)}" if msg else "")
            + f"{space()};"
        )
    if isinstance(node, ast.Assign):
        targets, value = node.targets, node.value

        return (
            f"{f'{space()}={space()}'.join(map(unparse, targets))}{space()}={space()}{unparse(value)}"
            + f"{space()};"
        )
    if isinstance(node, ast.AsyncFor):
        target, iter_, body, orelse = node.target, node.iter, node.body, node.orelse

        s = [
            f"async{space()}for{space()}{unparse(target)}{space()}in{space()}{unparse(iter_)}{space()}:",
            *indent(body, randrange(2, 5)),
        ]
        if orelse:
            s.append(f"else{space()}:")
            s.extend(indent(orelse, randrange(2, 5)))
        return "\n".join(s)
    if isinstance(node, ast.AsyncFunctionDef):
        name, args, body, decorator_list, returns = (
            node.name,
            node.args,
            node.body,
            node.decorator_list,
            node.returns,
        )

        return "\n".join(
            (
                *(f"@{space()}{unparse(decorator)}" for decorator in decorator_list),
                f"async{space(1)}def{space(1)}{name}{space()}({space()}{unparse(args, True)}{space()})"
                + (f"{space()}->{space()}{unparse(returns)}" if returns else "")
                + f"{space()}:",
                *indent(body, randrange(2, 5)),
            )
        )
    if isinstance(node, ast.AsyncWith):
        items, body = node.items, node.body

        return "\n".join(
            [
                f"async{space(1)}with{space(1)}{f',{space()}'.join(map(unparse, items))}{space()}:",
                *indent(body, randrange(2, 5)),
            ]
        )
    if isinstance(node, ast.Attribute):
        owner, attr = node.value, node.attr

        return f"{unparse(owner)}{space()}.{space()}{attr}"
    if isinstance(node, ast.AugAssign):
        target, op, value = node.target, node.op, node.value

        return (
            f"{unparse(target)}{space()}{op_strs[type(op)]}={space()}{unparse(value)}{space()};"
        )
    if isinstance(node, ast.Await):
        value = node.value

        return f"await{space(1)}{unparse(value)}"
    if isinstance(node, ast.BoolOp):
        op, values = node.op, node.values

        return f"{space(1)}{op_strs[type(op)]}{space(1)}".join(
            f"{(parenthesize if get_precedence(value) <= get_precedence(op) else unparse)(value)}"
            for value in values
        )
    if isinstance(node, ast.Break):

        return f"break{space()};"
    if isinstance(node, ast.BinOp):
        left, op, right = node.left, node.op, node.right

        op_type = type(op)

        par_left = (
            get_precedence(left) < get_precedence(op)
            if op_type not in r_assoc
            else get_precedence(left) <= get_precedence(op)
        )
        par_right = (
            get_precedence(right) <= get_precedence(op)
            if op_type not in r_assoc
            else get_precedence(right) < get_precedence(op)
        )
        nl_before = (op_type in nl_before_op) * "\n"
        nl_after = (op_type not in nl_before_op) * "\n"

        return (
            f"({(parenthesize if par_left else unparse)(left, True)}{space()}"
            + f"{nl_before}{op_strs[type(op)]}{space()}{nl_after}"
            + f"{(parenthesize if par_right else unparse)(right, True)})"
        )
    if isinstance(node, ast.Call):
        func, args, keywords = node.func, node.args, node.keywords

        return (
            f"{(parenthesize if get_precedence(func) < get_precedence(node) else unparse)(func)}{space()}"
            f"({space()}{f'{space()},{space()}'.join(unparse(arg, True) for arg in args)}"
            + (
                (f"{space()},{space()}" if args else "")
                + f"{space()},{space()}".join(unparse(kwarg, True) for kwarg in keywords)
                if keywords
                else ""
            )
            + space()
            + ")"
        )
    if isinstance(node, ast.ClassDef):
        name, bases, keywords, body, decorator_list = (
            node.name,
            node.bases,
            node.keywords,
            node.body,
            node.decorator_list,
        )

        args = bases + keywords
        return "\n".join(
            [
                *(f"@{space()}{unparse(decorator)}" for decorator in decorator_list),
                f"class{space(1)}{name}{space()}"
                + (
                    f"({space()}{f'{space()},{space()}'.join(unparse(arg, True) for arg in args)}{space()})"
                    if args
                    else ""
                )
                + f"{space()}:",
                *indent(body, randrange(2, 5)),
            ]
        )
    if isinstance(node, ast.Compare):
        left, ops, comparators = node.left, node.ops, node.comparators

        return (
            f"{(parenthesize if get_precedence(left) <= get_precedence(ops[0]) else unparse)(left)}"
            + f"{space()}".join(
                f"{space()}{op_strs[type(op)]}{space()}"
                f"{(parenthesize if get_precedence(left) <= get_precedence(op) else unparse)(comparator)}"
                for op, comparator in zip(ops, comparators)
            )
        )
    if isinstance(node, ast.Constant):
        value = node.value

        return repr(value) if value != Ellipsis else "..."
    if isinstance(node, ast.Continue):

        return f"continue{space()};"
    if isinstance(node, ast.Delete):
        targets = node.targets

        return f"del{space(1)}{f'{space()},{space()}'.join(map(unparse, targets))};"
    if isinstance(node, ast.Dict):
        keys, values = node.keys, node.values

        return (
            "{"
            + space()
            + f"{space()},{space()}".join(
                f"{unparse(key)}{space()}:{space()}{unparse(value)}"
                if key
                else f"**{space()}{unparse(value)}"
                for key, value in zip(keys, values)
            )
            + space()
            + "}"
        )
    if isinstance(node, ast.DictComp):
        key, value, generators = node.key, node.value, node.generators

        return (
            "{"
            + space()
            + f"{unparse(key)}{space()}:{space()}{unparse(value)}{space(1)}"
            + f"{space(1)}".join(map(unparse, generators))
            + space()
            + "}"
        )
    if isinstance(node, ast.ExceptHandler):
        type_, name, body = node.type, node.name, node.body

        return "\n".join(
            [
                f"except{space(1)}"
                + (f"{unparse(type_)}" if type_ else "")
                + (f"{space(1)}as{space(1)}{name}" if name else "")
                + f"{space()}:",
                *indent(body, randrange(2, 5)),
            ]
        )
    if isinstance(node, ast.Expr):
        value = node.value

        return unparse(value) + f"{space()};"
    if isinstance(node, ast.For):
        target, iter_, body, orelse = node.target, node.iter, node.body, node.orelse

        s = [
            f"for{space(1)}{unparse(target)}{space(1)}in{space(1)}{unparse(iter_)}:",
            *indent(body, randrange(2, 5)),
        ]
        if orelse:
            s.append(f"else{space()}:")
            s.extend(indent(orelse, randrange(2, 5)))
        return "\n".join(s)
    if isinstance(node, ast.FormattedValue):

        return ast.unparse(node)
    if isinstance(node, ast.FunctionDef):
        name, args, body, decorator_list, returns = (
            node.name,
            node.args,
            node.body,
            node.decorator_list,
            node.returns,
        )

        return "\n".join(
            [
                *(f"@{space()}{unparse(decorator)}" for decorator in decorator_list),
                f"sync{space(1)}def{space(1)}{name}{space()}"
                f"({space()}{unparse(args, True)}{space()})"
                + (f"{space()}->{space()}{unparse(returns)}" if returns else "")
                + f"{space()}:",
                *indent(body, randrange(2, 5)),
            ]
        )
    if isinstance(node, ast.GeneratorExp):
        elt, generators = node.elt, node.generators

        return (
            f"({space()}"
            + f"{unparse(elt)}{space()}"
            + f"{space()}".join(map(unparse, generators))
            + f"{space()})"
        )
    if isinstance(node, ast.Global):
        names = node.names

        return f"global{space(1)}{', '.join(map(unparse, names))}{space()};"
    if isinstance(node, ast.If):
        test, body, orelse = node.test, node.body, node.orelse

        s = [
            f"if{space(1)}{unparse(test)}{space()}:",
            *indent(body, randrange(2, 5)),
        ]
        if orelse:
            s.append(f"else{space()}:")
            s.extend(indent(orelse, randrange(2, 5)))
        return "\n".join(s)
    if isinstance(node, ast.IfExp):
        test, body, orelse = node.test, node.body, node.orelse

        return (
            f"{(parenthesize if get_precedence(body) < get_precedence(node) else unparse)(body)}{space(1)}"
            + f"if{space(1)}"
            + f"{(parenthesize if get_precedence(body) < get_precedence(node) else unparse)(test)}{space(1)}"
            + f"else{space(1)}{(parenthesize if get_precedence(body) < get_precedence(node) else unparse)(orelse)}"
        )
    if isinstance(node, ast.Import):
        names = node.names

        return (
            f"import{space(1)}"
            + f"{space()},{space()}".join(
                f"{name.name}"
                + (f"{space(1)}as{space(1)}{name.asname}" if name.asname else "")
                for name in names
            )
            + f"{space()};"
        )
    if isinstance(node, ast.ImportFrom):
        module, names, level = node.module, node.names, node.level

        return (
            f"from{space(1)}{'.'*level}{module}{space(1)}import{space(1)}"
            + f"{space()},{space()}".join(
                f"{name.name}"
                + (f"{space(1)}as{space(1)}{name.asname}" if name.asname else "")
                for name in names
            )
            + f"{space()};"
        )
    if isinstance(node, ast.JoinedStr):

        return ast.unparse(node)
    if isinstance(node, ast.Lambda):
        args, body = node.args, node.body

        return f"lambda{space(1)}{unparse(args)}{space()}:{space()}{unparse(body)}"
    if isinstance(node, ast.List):
        elts = node.elts

        return (
            f"[{space()}"
            + f"{space()},{space()}".join(unparse(elt, True) for elt in elts)
            + f"{space()}]"
        )
    if isinstance(node, ast.ListComp):
        elt, generators = node.elt, node.generators

        return (
            f"[{space()}"
            + f"{unparse(elt)} "
            + f"{space(1)}".join(map(unparse, generators))
            + f"{space()}]"
        )
    if isinstance(node, ast.Module):
        body = node.body

        return "\n".join(indent(body, 0))
    if isinstance(node, ast.Name):
        id_ = node.id

        return id_
    if isinstance(node, ast.NamedExpr):
        target, value = node.target, node.value

        return f"({unparse(target)}{space()}:={space()}{unparse(value)})"
    if isinstance(node, ast.Nonlocal):
        names = node.names

        return f"nonlocal{space(1)}{f'{space()},{space()}'.join(map(unparse, names))};{space()}"
    if isinstance(node, ast.Pass):

        return f"pass{space()};"
    if isinstance(node, ast.Raise):
        exc, cause = node.exc, node.cause

        if not exc:
            return f"raise{space()};"

        return (
            f"raise{space(1)}{unparse(exc)}"
            + (f"{space(1)}from{space(1)}{unparse(cause)}" if cause else "")
            + f"{space()};"
        )
    if isinstance(node, ast.Return):
        value = node.value

        if not value:
            return f"return{space()};"

        return f"return{space(1)}{unparse(value)}{space()};"
    if isinstance(node, ast.Set):
        elts = node.elts

        return (
            "{"
            + space()
            + f"{space()},{space()}".join(unparse(elt, True) for elt in elts)
            + space()
            + "}"
        )
    if isinstance(node, ast.SetComp):
        elt, generators = node.elt, node.generators

        return (
            "{"
            + space()
            + f"{unparse(elt)}{space(1)}"
            + f"{space(1)}".join(map(unparse, generators))
            + space()
            + "}"
        )
    if isinstance(node, ast.Slice):
        lower, upper, step = node.lower, node.upper, node.step
        lower = '' if lower is None else unparse(lower)
        upper = '' if upper is None else unparse(upper)
        step = '' if step is None else unparse(step)
        s = f"{lower}{space()}:{space()}{upper}{space()}:{space()}{step}"
        return ":" if s.replace(" ", "") == "::" else s
    if isinstance(node, ast.Starred):
        value = node.value

        return f"*{space()}{parenthesize(value)}"
    if isinstance(node, ast.Subscript):
        value, slice_ = node.value, node.slice

        return (
            f"{(parenthesize if get_precedence(value) < get_precedence(node) else unparse)(value)}{space()}"
            f"[{space()}{unparse(slice_, True)}{space()}]"
        )
    if isinstance(node, ast.Try):
        body, handlers, orelse, finalbody = (
            node.body,
            node.handlers,
            node.orelse,
            node.finalbody,
        )

        s = [f"try{space()}:", *indent(body, randrange(2, 5))]
        for handler in handlers:
            s.extend(unparse(handler).splitlines())
        if orelse:
            s.append(f"else{space()}:")
            s.extend(indent(orelse, randrange(2, 5)))
        if finalbody:
            s.append(f"finally{space()}:")
            s.extend(indent(finalbody, randrange(2, 5)))
        return "\n".join(s)
    if isinstance(node, ast.Tuple):
        elts = node.elts

        return (
            f"({space()}"
            + f"{space()},{space()}".join(unparse(elt, True) for elt in elts)
            + f"{space()})"
        )
    if isinstance(node, ast.UnaryOp):
        op, operand = node.op, node.operand

        par_op = get_precedence(operand) < get_precedence(op)
        return f"{op_strs[type(op)]}{space()}{(parenthesize if par_op else unparse)(operand)}"
    if isinstance(node, ast.While):
        test, body, orelse = node.test, node.body, node.orelse

        s = [
            f"while{space(1)}{unparse(test)}{space()}:",
            *indent(body, randrange(2, 5)),
        ]
        if orelse:
            s.append(f"else{space()}:")
            s.extend(indent(orelse, randrange(2, 5)))
        return "\n".join(s)
    if isinstance(node, ast.With):
        items, body = node.items, node.body

        return "\n".join(
            [
                f"with{space(1)}{f'{space()},{space()}'.join(map(unparse, items))}{space()}:",
                *indent(body, randrange(2, 5)),
            ]
        )
    if isinstance(node, ast.Yield):
        value = node.value

        if not value:
            return f"yield{space()};"

        return f"yield{space(1)}{unparse(value)}"
    if isinstance(node, ast.YieldFrom):
        value = node.value

        return f"yield{space(1)}from{space(1)}{unparse(value)}"

    if isinstance(node, ast.arg):
        arg, annotation = node.arg, node.annotation

        return arg + (f"{space()}:{space()}{unparse(annotation)}" if annotation else "")
    if isinstance(node, ast.arguments):
        posonlyargs, args, vararg, kwonlyargs, kw_defaults, kwarg, defaults = (
            node.posonlyargs,
            node.args,
            node.vararg,
            node.kwonlyargs,
            node.kw_defaults,
            node.kwarg,
            node.defaults,
        )

        s = ""
        first = True
        all_args = posonlyargs + args
        defaults = [None] * (len(all_args) - len(defaults)) + defaults
        for index, elements in enumerate(zip(all_args, defaults), 1):
            a, d = elements
            if first:
                first = False
            else:
                s += f"{space()},{space()}"
            s += unparse(a, nl_able)
            if d:
                s += f"{space()}={space()}" + unparse(d, nl_able)
            if index == len(posonlyargs):
                s += f"{space()},{space()}/"

        if vararg or kwonlyargs:
            if first:
                first = False
            else:
                s += f"{space()},{space()}"
            s += f"{space()}*{space()}"
            if vararg:
                s += vararg.arg
                if vararg.annotation:
                    s += f"{space()}:{space()}" + unparse(vararg.annotation, nl_able)

        if kwonlyargs:
            for a, d in zip(kwonlyargs, kw_defaults):
                s += f"{space()},{space()}" + unparse(a, nl_able)
                if d:
                    s += f"{space()}={space()}{unparse(d, nl_able)}"
        if kwarg:
            if not first:
                s += f"{space()},{space()}"
            s += f"**{space()}{kwarg.arg}"
            if kwarg.annotation:
                s += f"{space()}:{space()}{unparse(kwarg.annotation, nl_able)}"
        return s
    if isinstance(node, ast.keyword):
        arg, value = node.arg, node.value

        return (f"{arg}{space()}={space()}" if arg else f"**{space()}") + unparse(value)
    if isinstance(node, ast.comprehension):
        target, iter_, ifs, is_async = node.target, node.iter, node.ifs, node.is_async

        return (
            f"async{space(1)}" if is_async else ""
            + f"for{space(1)}{unparse(target)}{space(1)}in{space(1)}{unparse(iter_)}"
            + (f"{space(1)}" if ifs else "")
            + f"{space(1)}".join(f"if{space(1)}{unparse(if_)}" for if_ in ifs)
        )
    if isinstance(node, ast.withitem):
        context_expr, optional_vars = node.context_expr, node.optional_vars

        return f"{unparse(context_expr)}" + (
            f"{space(1)}as{space(1)}{unparse(optional_vars)}" if optional_vars else ""
        )

    return ast.unparse(node)


def blurplify(src: str) -> str:
    """Format the given source code in accordance with PEP 9001."""
    src_ast = ast.parse(src)
    return "# coding=UTF-8-NOBOM\n" + invert_indents(unparse(src_ast))

<filename>bot/utils/blurple_formatter.py<gh_stars>10-100
import ast
from collections.abc import Generator
from random import randrange

MAX_LINE_LENGTH = 50

op_strs = {
    ast.Add: "+",
    ast.Mult: "*",
    ast.Sub: "-",
    ast.Div: "/",
    ast.FloorDiv: "//",
    ast.Mod: "%",
    ast.Pow: "**",
    ast.BitXor: "^",
    ast.BitOr: "|",
    ast.BitAnd: "&",
    ast.LShift: "<<",
    ast.RShift: ">>",
    ast.Invert: "~",
    ast.Not: "not",
    ast.UAdd: "+",
    ast.USub: "-",
    ast.Eq: "==",
    ast.NotEq: "!=",
    ast.Lt: "<",
    ast.LtE: "<=",
    ast.Gt: ">",
    ast.GtE: ">=",
    ast.Is: "is",
    ast.IsNot: "is not",
    ast.In: "in",
    ast.NotIn: "not in",
    ast.And: "and",
    ast.Or: "or",
}

# Operator precedence table
precedences = [
    {
        ast.Name,
        ast.Constant,
        ast.JoinedStr,
        ast.List,
        ast.ListComp,
        ast.Dict,
        ast.DictComp,
        ast.Set,
        ast.SetComp,
        ast.Tuple,
        ast.GeneratorExp,
    },
    {ast.Subscript, ast.Call, ast.Attribute},
    {ast.Await},
    {ast.Pow},
    {ast.UAdd, ast.USub, ast.Invert},
    {ast.Mult, ast.MatMult, ast.Div, ast.FloorDiv, ast.Mod},
    {ast.Add, ast.Sub},
    {ast.LShift, ast.RShift},
    {ast.BitAnd},
    {ast.BitXor},
    {ast.BitOr},
    {
        ast.In,
        ast.NotIn,
        ast.Is,
        ast.IsNot,
        ast.Lt,
        ast.LtE,
        ast.Gt,
        ast.GtE,
        ast.NotEq,
        ast.Eq,
    },
    {ast.Not},
    {ast.And},
    {ast.Or},
    {ast.IfExp},
    {ast.Lambda},
    {ast.NamedExpr},
]
precedences = {op: i for i, ops in enumerate(precedences[::-1]) for op in ops}


# Right associative operators
r_assoc = {ast.Pow}

# Statements which can have a semicolon after them
semicolon_able = (
    ast.AnnAssign,
    ast.Assert,
    ast.Assign,
    ast.AugAssign,
    ast.Break,
    ast.Continue,
    ast.Delete,
    ast.Expr,
    ast.Global,
    ast.Import,
    ast.ImportFrom,
    ast.Nonlocal,
    ast.Pass,
    ast.Raise,
    ast.Return,
)

# Operators for which the newline goes before
nl_before_op = {ast.Add, ast.Mult}


def get_precedence(node: ast.AST) -> int:
    """Get the precedence of the given node."""
    if isinstance(node, (ast.BoolOp, ast.BinOp, ast.UnaryOp)):
        return precedences[type(node.op)]
    if isinstance(node, ast.Compare):
        return precedences[type(node.ops[0])]
    return precedences.get(type(node), 0)


def space(a: int = 1, b: int = 3) -> str:
    """Randomly generate whitespace of length between the given bounds."""
    return " " * randrange(a, b)


def num_spaces(src: str) -> int:
    """Count the number of spaces at the beginning of the string."""
    return len(src) - len(src.lstrip())


def invert_indents(src: str) -> str:
    """
    Invert the indentation on each line of the given string.

    Lines with the maximum indentation become least indented, and vice versa.
    """
    lines = src.splitlines()
    max_spaces = max(num_spaces(line) for line in lines)
    return "\n".join(
        (max_spaces - num_spaces(line)) * " " + line.lstrip() for line in lines
    )


def parenthesize(node: ast.AST, _nl_able: bool = False) -> str:
    """Wrap the un-parsed node in parentheses."""
    return f"({unparse(node, True)})"


def indent(nodes: list[ast.AST], n: int) -> Generator[str, None, None]:
    """
    Indent each line of the un-parsed nodes by the given number of spaces.

    Multiple nodes are put on the same line, separated by semicolons, if possible
    until they hit the line length limit.
    """
    curr_chunk = []
    curr_len = 0
    for stmt in nodes:
        stmt_lines = unparse(stmt).splitlines()
        if isinstance(stmt, semicolon_able):
            for line in stmt_lines:
                curr_chunk.append(line)
                curr_len += len(line)
                if curr_len > MAX_LINE_LENGTH or curr_chunk[-1][-1] != ";":
                    yield n * " " + space().join(curr_chunk)
                    curr_len = 0
                    curr_chunk = []
        else:
            yield n * " " + space().join(curr_chunk)
            yield from (f"{n * ' '}{line}" for line in stmt_lines)
            curr_len = 0
            curr_chunk = []

    if curr_chunk:
        yield n * " " + space().join(curr_chunk)


def unparse(node: ast.AST, nl_able: bool = False) -> str:
    """Convert the ast node to formatted(!) Python source code."""
    if isinstance(node, ast.AnnAssign):
        target, annotation, value = node.target, node.annotation, node.value

        return (
            f"{unparse(target)}{space()}:{space()}{unparse(annotation)}"
            + (f"{space()}={space()}{unparse(value)}" if value else "")
            + f"{space()};"
        )
    if isinstance(node, ast.Assert):
        test, msg = node.test, node.msg

        return (
            f"assert{space(1)}{unparse(test)}"
            + (f",{space()}{unparse(msg)}" if msg else "")
            + f"{space()};"
        )
    if isinstance(node, ast.Assign):
        targets, value = node.targets, node.value

        return (
            f"{f'{space()}={space()}'.join(map(unparse, targets))}{space()}={space()}{unparse(value)}"
            + f"{space()};"
        )
    if isinstance(node, ast.AsyncFor):
        target, iter_, body, orelse = node.target, node.iter, node.body, node.orelse

        s = [
            f"async{space()}for{space()}{unparse(target)}{space()}in{space()}{unparse(iter_)}{space()}:",
            *indent(body, randrange(2, 5)),
        ]
        if orelse:
            s.append(f"else{space()}:")
            s.extend(indent(orelse, randrange(2, 5)))
        return "\n".join(s)
    if isinstance(node, ast.AsyncFunctionDef):
        name, args, body, decorator_list, returns = (
            node.name,
            node.args,
            node.body,
            node.decorator_list,
            node.returns,
        )

        return "\n".join(
            (
                *(f"@{space()}{unparse(decorator)}" for decorator in decorator_list),
                f"async{space(1)}def{space(1)}{name}{space()}({space()}{unparse(args, True)}{space()})"
                + (f"{space()}->{space()}{unparse(returns)}" if returns else "")
                + f"{space()}:",
                *indent(body, randrange(2, 5)),
            )
        )
    if isinstance(node, ast.AsyncWith):
        items, body = node.items, node.body

        return "\n".join(
            [
                f"async{space(1)}with{space(1)}{f',{space()}'.join(map(unparse, items))}{space()}:",
                *indent(body, randrange(2, 5)),
            ]
        )
    if isinstance(node, ast.Attribute):
        owner, attr = node.value, node.attr

        return f"{unparse(owner)}{space()}.{space()}{attr}"
    if isinstance(node, ast.AugAssign):
        target, op, value = node.target, node.op, node.value

        return (
            f"{unparse(target)}{space()}{op_strs[type(op)]}={space()}{unparse(value)}{space()};"
        )
    if isinstance(node, ast.Await):
        value = node.value

        return f"await{space(1)}{unparse(value)}"
    if isinstance(node, ast.BoolOp):
        op, values = node.op, node.values

        return f"{space(1)}{op_strs[type(op)]}{space(1)}".join(
            f"{(parenthesize if get_precedence(value) <= get_precedence(op) else unparse)(value)}"
            for value in values
        )
    if isinstance(node, ast.Break):

        return f"break{space()};"
    if isinstance(node, ast.BinOp):
        left, op, right = node.left, node.op, node.right

        op_type = type(op)

        par_left = (
            get_precedence(left) < get_precedence(op)
            if op_type not in r_assoc
            else get_precedence(left) <= get_precedence(op)
        )
        par_right = (
            get_precedence(right) <= get_precedence(op)
            if op_type not in r_assoc
            else get_precedence(right) < get_precedence(op)
        )
        nl_before = (op_type in nl_before_op) * "\n"
        nl_after = (op_type not in nl_before_op) * "\n"

        return (
            f"({(parenthesize if par_left else unparse)(left, True)}{space()}"
            + f"{nl_before}{op_strs[type(op)]}{space()}{nl_after}"
            + f"{(parenthesize if par_right else unparse)(right, True)})"
        )
    if isinstance(node, ast.Call):
        func, args, keywords = node.func, node.args, node.keywords

        return (
            f"{(parenthesize if get_precedence(func) < get_precedence(node) else unparse)(func)}{space()}"
            f"({space()}{f'{space()},{space()}'.join(unparse(arg, True) for arg in args)}"
            + (
                (f"{space()},{space()}" if args else "")
                + f"{space()},{space()}".join(unparse(kwarg, True) for kwarg in keywords)
                if keywords
                else ""
            )
            + space()
            + ")"
        )
    if isinstance(node, ast.ClassDef):
        name, bases, keywords, body, decorator_list = (
            node.name,
            node.bases,
            node.keywords,
            node.body,
            node.decorator_list,
        )

        args = bases + keywords
        return "\n".join(
            [
                *(f"@{space()}{unparse(decorator)}" for decorator in decorator_list),
                f"class{space(1)}{name}{space()}"
                + (
                    f"({space()}{f'{space()},{space()}'.join(unparse(arg, True) for arg in args)}{space()})"
                    if args
                    else ""
                )
                + f"{space()}:",
                *indent(body, randrange(2, 5)),
            ]
        )
    if isinstance(node, ast.Compare):
        left, ops, comparators = node.left, node.ops, node.comparators

        return (
            f"{(parenthesize if get_precedence(left) <= get_precedence(ops[0]) else unparse)(left)}"
            + f"{space()}".join(
                f"{space()}{op_strs[type(op)]}{space()}"
                f"{(parenthesize if get_precedence(left) <= get_precedence(op) else unparse)(comparator)}"
                for op, comparator in zip(ops, comparators)
            )
        )
    if isinstance(node, ast.Constant):
        value = node.value

        return repr(value) if value != Ellipsis else "..."
    if isinstance(node, ast.Continue):

        return f"continue{space()};"
    if isinstance(node, ast.Delete):
        targets = node.targets

        return f"del{space(1)}{f'{space()},{space()}'.join(map(unparse, targets))};"
    if isinstance(node, ast.Dict):
        keys, values = node.keys, node.values

        return (
            "{"
            + space()
            + f"{space()},{space()}".join(
                f"{unparse(key)}{space()}:{space()}{unparse(value)}"
                if key
                else f"**{space()}{unparse(value)}"
                for key, value in zip(keys, values)
            )
            + space()
            + "}"
        )
    if isinstance(node, ast.DictComp):
        key, value, generators = node.key, node.value, node.generators

        return (
            "{"
            + space()
            + f"{unparse(key)}{space()}:{space()}{unparse(value)}{space(1)}"
            + f"{space(1)}".join(map(unparse, generators))
            + space()
            + "}"
        )
    if isinstance(node, ast.ExceptHandler):
        type_, name, body = node.type, node.name, node.body

        return "\n".join(
            [
                f"except{space(1)}"
                + (f"{unparse(type_)}" if type_ else "")
                + (f"{space(1)}as{space(1)}{name}" if name else "")
                + f"{space()}:",
                *indent(body, randrange(2, 5)),
            ]
        )
    if isinstance(node, ast.Expr):
        value = node.value

        return unparse(value) + f"{space()};"
    if isinstance(node, ast.For):
        target, iter_, body, orelse = node.target, node.iter, node.body, node.orelse

        s = [
            f"for{space(1)}{unparse(target)}{space(1)}in{space(1)}{unparse(iter_)}:",
            *indent(body, randrange(2, 5)),
        ]
        if orelse:
            s.append(f"else{space()}:")
            s.extend(indent(orelse, randrange(2, 5)))
        return "\n".join(s)
    if isinstance(node, ast.FormattedValue):

        return ast.unparse(node)
    if isinstance(node, ast.FunctionDef):
        name, args, body, decorator_list, returns = (
            node.name,
            node.args,
            node.body,
            node.decorator_list,
            node.returns,
        )

        return "\n".join(
            [
                *(f"@{space()}{unparse(decorator)}" for decorator in decorator_list),
                f"sync{space(1)}def{space(1)}{name}{space()}"
                f"({space()}{unparse(args, True)}{space()})"
                + (f"{space()}->{space()}{unparse(returns)}" if returns else "")
                + f"{space()}:",
                *indent(body, randrange(2, 5)),
            ]
        )
    if isinstance(node, ast.GeneratorExp):
        elt, generators = node.elt, node.generators

        return (
            f"({space()}"
            + f"{unparse(elt)}{space()}"
            + f"{space()}".join(map(unparse, generators))
            + f"{space()})"
        )
    if isinstance(node, ast.Global):
        names = node.names

        return f"global{space(1)}{', '.join(map(unparse, names))}{space()};"
    if isinstance(node, ast.If):
        test, body, orelse = node.test, node.body, node.orelse

        s = [
            f"if{space(1)}{unparse(test)}{space()}:",
            *indent(body, randrange(2, 5)),
        ]
        if orelse:
            s.append(f"else{space()}:")
            s.extend(indent(orelse, randrange(2, 5)))
        return "\n".join(s)
    if isinstance(node, ast.IfExp):
        test, body, orelse = node.test, node.body, node.orelse

        return (
            f"{(parenthesize if get_precedence(body) < get_precedence(node) else unparse)(body)}{space(1)}"
            + f"if{space(1)}"
            + f"{(parenthesize if get_precedence(body) < get_precedence(node) else unparse)(test)}{space(1)}"
            + f"else{space(1)}{(parenthesize if get_precedence(body) < get_precedence(node) else unparse)(orelse)}"
        )
    if isinstance(node, ast.Import):
        names = node.names

        return (
            f"import{space(1)}"
            + f"{space()},{space()}".join(
                f"{name.name}"
                + (f"{space(1)}as{space(1)}{name.asname}" if name.asname else "")
                for name in names
            )
            + f"{space()};"
        )
    if isinstance(node, ast.ImportFrom):
        module, names, level = node.module, node.names, node.level

        return (
            f"from{space(1)}{'.'*level}{module}{space(1)}import{space(1)}"
            + f"{space()},{space()}".join(
                f"{name.name}"
                + (f"{space(1)}as{space(1)}{name.asname}" if name.asname else "")
                for name in names
            )
            + f"{space()};"
        )
    if isinstance(node, ast.JoinedStr):

        return ast.unparse(node)
    if isinstance(node, ast.Lambda):
        args, body = node.args, node.body

        return f"lambda{space(1)}{unparse(args)}{space()}:{space()}{unparse(body)}"
    if isinstance(node, ast.List):
        elts = node.elts

        return (
            f"[{space()}"
            + f"{space()},{space()}".join(unparse(elt, True) for elt in elts)
            + f"{space()}]"
        )
    if isinstance(node, ast.ListComp):
        elt, generators = node.elt, node.generators

        return (
            f"[{space()}"
            + f"{unparse(elt)} "
            + f"{space(1)}".join(map(unparse, generators))
            + f"{space()}]"
        )
    if isinstance(node, ast.Module):
        body = node.body

        return "\n".join(indent(body, 0))
    if isinstance(node, ast.Name):
        id_ = node.id

        return id_
    if isinstance(node, ast.NamedExpr):
        target, value = node.target, node.value

        return f"({unparse(target)}{space()}:={space()}{unparse(value)})"
    if isinstance(node, ast.Nonlocal):
        names = node.names

        return f"nonlocal{space(1)}{f'{space()},{space()}'.join(map(unparse, names))};{space()}"
    if isinstance(node, ast.Pass):

        return f"pass{space()};"
    if isinstance(node, ast.Raise):
        exc, cause = node.exc, node.cause

        if not exc:
            return f"raise{space()};"

        return (
            f"raise{space(1)}{unparse(exc)}"
            + (f"{space(1)}from{space(1)}{unparse(cause)}" if cause else "")
            + f"{space()};"
        )
    if isinstance(node, ast.Return):
        value = node.value

        if not value:
            return f"return{space()};"

        return f"return{space(1)}{unparse(value)}{space()};"
    if isinstance(node, ast.Set):
        elts = node.elts

        return (
            "{"
            + space()
            + f"{space()},{space()}".join(unparse(elt, True) for elt in elts)
            + space()
            + "}"
        )
    if isinstance(node, ast.SetComp):
        elt, generators = node.elt, node.generators

        return (
            "{"
            + space()
            + f"{unparse(elt)}{space(1)}"
            + f"{space(1)}".join(map(unparse, generators))
            + space()
            + "}"
        )
    if isinstance(node, ast.Slice):
        lower, upper, step = node.lower, node.upper, node.step
        lower = '' if lower is None else unparse(lower)
        upper = '' if upper is None else unparse(upper)
        step = '' if step is None else unparse(step)
        s = f"{lower}{space()}:{space()}{upper}{space()}:{space()}{step}"
        return ":" if s.replace(" ", "") == "::" else s
    if isinstance(node, ast.Starred):
        value = node.value

        return f"*{space()}{parenthesize(value)}"
    if isinstance(node, ast.Subscript):
        value, slice_ = node.value, node.slice

        return (
            f"{(parenthesize if get_precedence(value) < get_precedence(node) else unparse)(value)}{space()}"
            f"[{space()}{unparse(slice_, True)}{space()}]"
        )
    if isinstance(node, ast.Try):
        body, handlers, orelse, finalbody = (
            node.body,
            node.handlers,
            node.orelse,
            node.finalbody,
        )

        s = [f"try{space()}:", *indent(body, randrange(2, 5))]
        for handler in handlers:
            s.extend(unparse(handler).splitlines())
        if orelse:
            s.append(f"else{space()}:")
            s.extend(indent(orelse, randrange(2, 5)))
        if finalbody:
            s.append(f"finally{space()}:")
            s.extend(indent(finalbody, randrange(2, 5)))
        return "\n".join(s)
    if isinstance(node, ast.Tuple):
        elts = node.elts

        return (
            f"({space()}"
            + f"{space()},{space()}".join(unparse(elt, True) for elt in elts)
            + f"{space()})"
        )
    if isinstance(node, ast.UnaryOp):
        op, operand = node.op, node.operand

        par_op = get_precedence(operand) < get_precedence(op)
        return f"{op_strs[type(op)]}{space()}{(parenthesize if par_op else unparse)(operand)}"
    if isinstance(node, ast.While):
        test, body, orelse = node.test, node.body, node.orelse

        s = [
            f"while{space(1)}{unparse(test)}{space()}:",
            *indent(body, randrange(2, 5)),
        ]
        if orelse:
            s.append(f"else{space()}:")
            s.extend(indent(orelse, randrange(2, 5)))
        return "\n".join(s)
    if isinstance(node, ast.With):
        items, body = node.items, node.body

        return "\n".join(
            [
                f"with{space(1)}{f'{space()},{space()}'.join(map(unparse, items))}{space()}:",
                *indent(body, randrange(2, 5)),
            ]
        )
    if isinstance(node, ast.Yield):
        value = node.value

        if not value:
            return f"yield{space()};"

        return f"yield{space(1)}{unparse(value)}"
    if isinstance(node, ast.YieldFrom):
        value = node.value

        return f"yield{space(1)}from{space(1)}{unparse(value)}"

    if isinstance(node, ast.arg):
        arg, annotation = node.arg, node.annotation

        return arg + (f"{space()}:{space()}{unparse(annotation)}" if annotation else "")
    if isinstance(node, ast.arguments):
        posonlyargs, args, vararg, kwonlyargs, kw_defaults, kwarg, defaults = (
            node.posonlyargs,
            node.args,
            node.vararg,
            node.kwonlyargs,
            node.kw_defaults,
            node.kwarg,
            node.defaults,
        )

        s = ""
        first = True
        all_args = posonlyargs + args
        defaults = [None] * (len(all_args) - len(defaults)) + defaults
        for index, elements in enumerate(zip(all_args, defaults), 1):
            a, d = elements
            if first:
                first = False
            else:
                s += f"{space()},{space()}"
            s += unparse(a, nl_able)
            if d:
                s += f"{space()}={space()}" + unparse(d, nl_able)
            if index == len(posonlyargs):
                s += f"{space()},{space()}/"

        if vararg or kwonlyargs:
            if first:
                first = False
            else:
                s += f"{space()},{space()}"
            s += f"{space()}*{space()}"
            if vararg:
                s += vararg.arg
                if vararg.annotation:
                    s += f"{space()}:{space()}" + unparse(vararg.annotation, nl_able)

        if kwonlyargs:
            for a, d in zip(kwonlyargs, kw_defaults):
                s += f"{space()},{space()}" + unparse(a, nl_able)
                if d:
                    s += f"{space()}={space()}{unparse(d, nl_able)}"
        if kwarg:
            if not first:
                s += f"{space()},{space()}"
            s += f"**{space()}{kwarg.arg}"
            if kwarg.annotation:
                s += f"{space()}:{space()}{unparse(kwarg.annotation, nl_able)}"
        return s
    if isinstance(node, ast.keyword):
        arg, value = node.arg, node.value

        return (f"{arg}{space()}={space()}" if arg else f"**{space()}") + unparse(value)
    if isinstance(node, ast.comprehension):
        target, iter_, ifs, is_async = node.target, node.iter, node.ifs, node.is_async

        return (
            f"async{space(1)}" if is_async else ""
            + f"for{space(1)}{unparse(target)}{space(1)}in{space(1)}{unparse(iter_)}"
            + (f"{space(1)}" if ifs else "")
            + f"{space(1)}".join(f"if{space(1)}{unparse(if_)}" for if_ in ifs)
        )
    if isinstance(node, ast.withitem):
        context_expr, optional_vars = node.context_expr, node.optional_vars

        return f"{unparse(context_expr)}" + (
            f"{space(1)}as{space(1)}{unparse(optional_vars)}" if optional_vars else ""
        )

    return ast.unparse(node)


def blurplify(src: str) -> str:
    """Format the given source code in accordance with PEP 9001."""
    src_ast = ast.parse(src)
    return "# coding=UTF-8-NOBOM\n" + invert_indents(unparse(src_ast))

# Operator precedence table # Right associative operators # Statements which can have a semicolon after them # Operators for which the newline goes before Get the precedence of the given node. Randomly generate whitespace of length between the given bounds. Count the number of spaces at the beginning of the string. Invert the indentation on each line of the given string.      Lines with the maximum indentation become least indented, and vice versa. Wrap the un-parsed node in parentheses. Indent each line of the un-parsed nodes by the given number of spaces.      Multiple nodes are put on the same line, separated by semicolons, if possible     until they hit the line length limit. Convert the ast node to formatted(!) Python source code. Format the given source code in accordance with PEP 9001.