def scons_subst_list(strSubst, env, mode=SUBST_RAW, target=None, source=None, gvars={}, lvars={}, conv=None):
#    try:
#        Subst_List_Strings[strSubst] = Subst_List_Strings[strSubst] + 1
#    except KeyError:
#        Subst_List_Strings[strSubst] = 1
#    import SCons.Debug
#    SCons.Debug.caller_trace(1)
    class ListSubber(collections.UserList):
        """A class to construct the results of a scons_subst_list() call.

        Like StringSubber, this class binds a specific construction
        environment, mode, target and source with two methods
        (substitute() and expand()) that handle the expansion.

        In addition, however, this class is used to track the state of
        the result(s) we're gathering so we can do the appropriate thing
        whenever we have to append another word to the result--start a new
        line, start a new word, append to the current word, etc.  We do
        this by setting the "append" attribute to the right method so
        that our wrapper methods only need ever call ListSubber.append(),
        and the rest of the object takes care of doing the right thing
        internally.
        """
        def __init__(self, env, mode, conv, gvars):
            collections.UserList.__init__(self, [])
            self.env = env
            self.mode = mode
            self.conv = conv
            self.gvars = gvars

            if self.mode == SUBST_RAW:
                self.add_strip = lambda x: self.append(x)
            else:
                self.add_strip = lambda x: None
            self.in_strip = None
            self.next_line()

        def expand(self, s, lvars, within_list):
            """Expand a single "token" as necessary, appending the
            expansion to the current result.

            This handles expanding different types of things (strings,
            lists, callables) appropriately.  It calls the wrapper
            substitute() method to re-expand things as necessary, so that
            the results of expansions of side-by-side strings still get
            re-evaluated separately, not smushed together.
            """

            if is_String(s):
                try:
                    s0, s1 = s[:2]
                except (IndexError, ValueError):
                    self.append(s)
                    return
                if s0 != '$':
                    self.append(s)
                    return
                if s1 == '$':
                    self.append('$')
                elif s1 == '(':
                    self.open_strip('$(')
                elif s1 == ')':
                    self.close_strip('$)')
                else:
                    key = s[1:]
                    if key[0] == '{' or key.find('.') >= 0:
                        if key[0] == '{':
                            key = key[1:-1]
                        try:
                            s = eval(key, self.gvars, lvars)
                        except KeyboardInterrupt:
                            raise
                        except Exception, e:
                            if e.__class__ in AllowableExceptions:
                                return
                            raise_exception(e, lvars['TARGETS'], s)
                    else:
                        if key in lvars:
                            s = lvars[key]
                        elif key in self.gvars:
                            s = self.gvars[key]
                        elif not NameError in AllowableExceptions:
                            raise_exception(NameError(), lvars['TARGETS'], s)
                        else:
                            return

                    # Before re-expanding the result, handle
                    # recursive expansion by copying the local
                    # variable dictionary and overwriting a null
                    # string for the value of the variable name
                    # we just expanded.
                    lv = lvars.copy()
                    var = key.split('.')[0]
                    lv[var] = ''
                    self.substitute(s, lv, 0)
                    self.this_word()
            elif is_Sequence(s):
                for a in s:
                    self.substitute(a, lvars, 1)
                    self.next_word()
            elif callable(s):
                try:
                    s = s(target=lvars['TARGETS'],
                         source=lvars['SOURCES'],
                         env=self.env,
                         for_signature=(self.mode != SUBST_CMD))
                except TypeError:
                    # This probably indicates that it's a callable
                    # object that doesn't match our calling arguments
                    # (like an Action).
                    if self.mode == SUBST_RAW:
                        self.append(s)
                        return
                    s = self.conv(s)
                self.substitute(s, lvars, within_list)
            elif s is None:
                self.this_word()
            else:
                self.append(s)

        def substitute(self, args, lvars, within_list):
            """Substitute expansions in an argument or list of arguments.

            This serves as a wrapper for splitting up a string into
            separate tokens.
            """

            if is_String(args) and not isinstance(args, CmdStringHolder):
                args = str(args)        # In case it's a UserString.
                args = _separate_args.findall(args)
                for a in args:
                    if a[0] in ' \t\n\r\f\v':
                        if '\n' in a:
                            self.next_line()
                        elif within_list:
                            self.append(a)
                        else:
                            self.next_word()
                    else:
                        self.expand(a, lvars, within_list)
            else:
                self.expand(args, lvars, within_list)

        def next_line(self):
            """Arrange for the next word to start a new line.  This
            is like starting a new word, except that we have to append
            another line to the result."""
            collections.UserList.append(self, [])
            self.next_word()

        def this_word(self):
            """Arrange for the next word to append to the end of the
            current last word in the result."""
            self.append = self.add_to_current_word

        def next_word(self):
            """Arrange for the next word to start a new word."""
            self.append = self.add_new_word

        def add_to_current_word(self, x):
            """Append the string x to the end of the current last word
            in the result.  If that is not possible, then just add
            it as a new word.  Make sure the entire concatenated string
            inherits the object attributes of x (in particular, the
            escape function) by wrapping it as CmdStringHolder."""

            if not self.in_strip or self.mode != SUBST_SIG:
                try:
                    current_word = self[-1][-1]
                except IndexError:
                    self.add_new_word(x)
                else:
                    # All right, this is a hack and it should probably
                    # be refactored out of existence in the future.
                    # The issue is that we want to smoosh words together
                    # and make one file name that gets escaped if
                    # we're expanding something like foo$EXTENSION,
                    # but we don't want to smoosh them together if
                    # it's something like >$TARGET, because then we'll
                    # treat the '>' like it's part of the file name.
                    # So for now, just hard-code looking for the special
                    # command-line redirection characters...
                    try:
                        last_char = str(current_word)[-1]
                    except IndexError:
                        last_char = '\0'
                    if last_char in '<>|':
                        self.add_new_word(x)
                    else:
                        y = current_word + x

                        # We used to treat a word appended to a literal
                        # as a literal itself, but this caused problems
                        # with interpreting quotes around space-separated
                        # targets on command lines.  Removing this makes
                        # none of the "substantive" end-to-end tests fail,
                        # so we'll take this out but leave it commented
                        # for now in case there's a problem not covered
                        # by the test cases and we need to resurrect this.
                        #literal1 = self.literal(self[-1][-1])
                        #literal2 = self.literal(x)
                        y = self.conv(y)
                        if is_String(y):
                            #y = CmdStringHolder(y, literal1 or literal2)
                            y = CmdStringHolder(y, None)
                        self[-1][-1] = y

        def add_new_word(self, x):
            if not self.in_strip or self.mode != SUBST_SIG:
                literal = self.literal(x)
                x = self.conv(x)
                if is_String(x):
                    x = CmdStringHolder(x, literal)
                self[-1].append(x)
            self.append = self.add_to_current_word

        def literal(self, x):
            try:
                l = x.is_literal
            except AttributeError:
                return None
            else:
                return l()

        def open_strip(self, x):
            """Handle the "open strip" $( token."""
            self.add_strip(x)
            self.in_strip = 1

        def close_strip(self, x):
            """Handle the "close strip" $) token."""
            self.add_strip(x)
            self.in_strip = None

    if conv is None:
        conv = _strconv[mode]

    # Doing this every time is a bit of a waste, since the Executor
    # has typically already populated the OverrideEnvironment with
    # $TARGET/$SOURCE variables.  We're keeping this (for now), though,
    # because it supports existing behavior that allows us to call
    # an Action directly with an arbitrary target+source pair, which
    # we use in Tool/tex.py to handle calling $BIBTEX when necessary.
    # If we dropped that behavior (or found another way to cover it),
    # we could get rid of this call completely and just rely on the
    # Executor setting the variables.
    if 'TARGET' not in lvars:
        d = subst_dict(target, source)
        if d:
            lvars = lvars.copy()
            lvars.update(d)

    # We're (most likely) going to eval() things.  If Python doesn't
    # find a __builtins__ value in the global dictionary used for eval(),
    # it copies the current global values for you.  Avoid this by
    # setting it explicitly and then deleting, so we don't pollute the
    # construction environment Dictionary(ies) that are typically used
    # for expansion.
    gvars['__builtins__'] = __builtins__

    ls = ListSubber(env, mode, conv, gvars)
    ls.substitute(strSubst, lvars, 0)

    try:
        del gvars['__builtins__']
    except KeyError:
        pass

    return ls.data
Lookup the CNAME records associated with C{name}.
dataset/ETHPy150Open kayhayen/Nuitka/nuitka/build/inline_copy/lib/scons-2.3.2/SCons/Subst.py/scons_subst_list--crossover with--dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/internet/interfaces.py/IResolver.lookupCanonicalName