def natural_sort()

in jcm/checkpoints.py [0:0]

• 10 lines of code
• 4 McCabe index (conditional complexity)

def natural_sort(file_list, signed=True):
    """Natural sort for filenames with numerical substrings.

    Args:
      file_list: List[str]: list of paths to sort containing numerical
        substrings.
      signed: bool: if leading '-' (or '+') signs should be included in
        numerical substrings as a sign or treated as a separator.
    Returns:
      List of filenames sorted 'naturally', not lexicographically: any
      integer substrings are used to subsort numerically. e.g.
      file_1, file_10, file_2  -->  file_1, file_2, file_10
      file_0.1, file_-0.2, file_2.0  -->  file_-0.2, file_0.1, file_2.0
    """
    float_re = SIGNED_FLOAT_RE if signed else UNSIGNED_FLOAT_RE

    def maybe_num(s):
        if float_re.match(s):
            return float(s)
        else:
            return s

    def split_keys(s):
        return [maybe_num(c) for c in float_re.split(s)]

    return sorted(file_list, key=split_keys)