python的string.punctuation为什么不能打印出来？

Question

如下代码所示，打印结果为空。

# -*-coding:utf-8-*-
import string

str = string.punctuation
print(str)

而查看string源码，punctuation不是字符串吗？

import _string

# Some strings for ctype-style character classification
whitespace = ' \t\n\r\v\f'
ascii_lowercase = 'abcdefghijklmnopqrstuvwxyz'
ascii_uppercase = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
ascii_letters = ascii_lowercase + ascii_uppercase
digits = '0123456789'
hexdigits = digits + 'abcdef' + 'ABCDEF'
octdigits = '01234567'
punctuation = r"""!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~"""
printable = digits + ascii_letters + punctuation + whitespace

Answer 1

Answer 2

代码没问题，可能是string模块重名了