问题描述
"""Concrete date/time and related types.
See http://www.iana.org/time-zones/repository/tz-link.html for
time zone and DST data sources.
"""
__all__ = ("date","datetime","time","timedelta","timezone","tzinfo","MINYEAR","MAXYEAR")
import time as _time
import math as _math
import sys
def _cmp(x,y):
return 0 if x == y else 1 if x > y else -1
如果我想使用“_cmp(x,y)。我该怎么做??
示例
考虑 Python class_file.py
def public_api():
print ("public api")
def _private_api():
print ("private API")
>>> from class_file import *
>>> public_api()
public api
>>> _private_api()
Traceback (most recent call last):
File "<stdin>",line 1,in <module>
NameError: name '_private_api' is not defined
>>> import class_file
>>> class_file.public_api()
public api
>>> class_file._private_api()
private API
在上述情况下,如果我使用
print(datetime._cmp(1,2))
它说AttributeError:模块'datetime'没有属性'_cmp'
解决方法
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