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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def explicit_line_join(logical_line, tokens):
 r"""Avoid explicit line join between brackets. The preferred way of wrapping long lines is by using Python's implied line continuation inside parentheses, brackets and braces. Long lines can be broken over multiple lines by wrapping expressions in parentheses. These should be used in preference to using a backslash for line continuation. E502: aaa = [123, \\n 123] E502: aaa = ("bbb " \\n "ccc") Okay: aaa = [123,\n 123] Okay: aaa = ("bbb "\n "ccc") Okay: aaa = "bbb " \\n "ccc" Okay: aaa = 123 # \\ """

    prev_start = prev_end = parens = 0
    comment = False
    backslash = None
    for token_type, text, start, end, line in tokens:
        if token_type == tokenize.COMMENT:
            comment = True
        if start[0] != prev_start and parens and backslash and not comment:
            yield backslash, "E502 the backslash is redundant between brackets"
        if end[0] != prev_end:
            if line.rstrip('\r\n').endswith('\\'):
                backslash = (end[0], len(line.splitlines()[-1]) - 1)
            else:
                backslash = None
            prev_start = prev_end = end[0]
        else:
            prev_start = start[0]
        if token_type == tokenize.OP:
            if text in '([{':
                parens += 1
            elif text in ')]}':
                parens -= 1