/usr/lib/python3/dist-packages/dbfread/ifiles.py is in python3-dbfread 2.0.7-2.
This file is owned by root:root, with mode 0o644.
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Functions for dealing with mixed-case files from case-preserving file
systems.
Todo:
  - handle patterns that already have brackets
"""
from __future__ import print_function
import os
import glob
import fnmatch
def ipat(pat):
    """Convert glob pattern to case insensitive form."""
    (dirname, pat) = os.path.split(pat)
    # Convert '/path/to/test.fpt' => '/path/to/[Tt][Ee][Ss][Tt].[]' 
    newpat = ''
    for c in pat:
        if c.isalpha:
            u = c.upper()
            l = c.lower()
            if u != l:
                newpat = newpat + '[' + u + l + ']'
            else:
                newpat += c
        else:
            newpat += c
    newpat = os.path.join(dirname, newpat)
    return newpat
def ifnmatch(name, pat):
    """Case insensitive version of fnmatch.fnmatch()"""
    return fnmatch.fnmatch(name, ipat(pat))
def iglob(pat):
    """Case insensitive version of glob.glob()"""
    return glob.glob(ipat(pat))
def ifind(pat, ext=None):
    """Look for a file in a case insensitive way.
    Returns filename it a matching file was found, or None if it was not.
    """
    if ext:
        pat = os.path.splitext(pat)[0] + ext
    files = iglob(pat)
    if files:
        return files[0]  # Return an arbitrary file
    else:
        return None
__all__ = ['ipat', 'ifnmatch', 'iglob', 'ifind']
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