def METHOD_NAME(s):
    """Return true if a path is absolute.
    On the Mac, relative paths begin with a colon,
    but as a special case, paths with no colons at all are also relative.
    Anything else is absolute (the string up to the first colon is the
    volume name)."""
    colon = _get_colon(s)
    return colon in s and s[:1] != colon