# coding: utf-8 #

import pprint
import sys

import locale

from io import StringIO

locale.setlocale(locale.LC_ALL, '')

ascii_alnum = "R"
non_ascii_alnum = "Ř"       # used in a few Western Slavic languages
unicode_alnum = "\u05d0"    # Hebrew Aleph

lst = (ascii_alnum, non_ascii_alnum, unicode_alnum)

def test(args):
    locale.setlocale(locale.LC_ALL, args)
    print(locale.getlocale(locale.LC_ALL))

    for char in lst:
        print("'{}'.isalnum(): {}".format(char, char.isalnum()))

    for char in lst:
        r = repr(char)
        s = pprint._safe_repr(char, {}, 0, 0)[0]
        print("'''{}''' == '''{}''': {}".format(r, s, r == s))

for args in (
    '',
    'C',
    ('en_US', 'ISO-8859-1'),
    ('zh_CN', '')):
    
    test(args)

def old_str_repr(object):
    if 'locale' not in sys.modules:
        return repr(object), True, False
    if "'" in object and '"' not in object:
        closure = '"'
        quotes = {'"': '\\"'}
    else:
        closure = "'"
        quotes = {"'": "\\'"}
    qget = quotes.get
    sio = StringIO()
    write = sio.write
    for char in object:
        if char.isalpha():
            write(char)
        else:
            write(qget(char, repr(char)[1:-1]))
    return ("%s%s%s" % (closure, sio.getvalue(), closure)), True, False

def new_str_repr(object):
    return repr(object), True, False


import timeit

t1 = timeit.Timer("""old_str_repr({})""".format(repr(sys.copyright[:16])), "from __main__ import old_str_repr").timeit()
t2 = timeit.Timer("""new_str_repr({})""".format(repr(sys.copyright[:16])), "from __main__ import new_str_repr").timeit()
print("t1: {}, t2: {}, speedup: {} times".format(
    t1, t2, int(t1 // t2)))