def pop_path2(path):
    """Return '/a/b/c' -> ('a', 'b', '/c')."""
    if path in ("", "/"):
        return ("", "", "")
    first, rest = pop_path(path)
    second, rest = pop_path(rest)
    return (first, second, "/" + rest)
def pop_path2(path):
    """Return '/a/b/c' -> ('a', 'b', '/c')."""
    if path in ("", "/"):
        return ("", "", "")
    first, rest = pop_path(path)
    second, rest = pop_path(rest)
    return (first, second, "/" + rest)
def pop_path2 ( path ) : if path in ( "" , "/" ) : return ( "" , "" , "" ) first , rest = pop_path ( path ) second , rest = pop_path ( rest ) return ( first , second , "/" + rest )
Return '/a/b/c' -> ('a', 'b', '/c').
Return / a / b / c - > ( a b / c ) .