def auto_decode(data):
    # type: (bytes) -> Text
    """Check a bytes string for a BOM to correctly detect the encoding

    Fallback to locale.getpreferredencoding(False) like open() on Python3"""
    for bom, encoding in BOMS:
        if data.startswith(bom):
            return data[len(bom):].decode(encoding)
    # Lets check the first two lines as in PEP263
    for line in data.split(b'\n')[:2]:
        if line[0:1] == b'#' and ENCODING_RE.search(line):
            encoding = ENCODING_RE.search(line).groups()[0].decode('ascii')
            return data.decode(encoding)
    return data.decode(
        locale.getpreferredencoding(False) or sys.getdefaultencoding(),
    )
Check a bytes string for a BOM to correctly detect the encoding

    Fallback to locale.getpreferredencoding(False) like open() on Python3
stackoverflow/venv/lib/python3.6/site-packages/pip-19.0.3-py3.6.egg/pip/_internal/utils/encoding.py