由于Python的datetime和time中的_strptime方法不支持多线程，运行时会报错：

 

import datetime

import thread

import time

def f():

    datetime.datetime.strptime("20100101","%Y%m%d")

for _ in xrange(3):

    thread.start_new_thread(f, ())

time.sleep(3)

Unhandled exception in thread started by <function f at 0x2b52c24e66e0>

Traceback (most recent call last):

  File "test.py", line 7, in f

    datetime.datetime.strptime("20100101","%Y%m%d")

AttributeErrorUnhandled exception in thread started by <function f at 0x2b52c24e66e0>:

Traceback (most recent call last):

  File "test.py", line 7, in f

_strptime

    datetime.datetime.strptime("20100101","%Y%m%d")

AttributeError: _strptime

参考

在源文件中可以fix这个bug，不过对于用户来说，还是在使用的时候加锁吧。。

c = threading.RLock()

def f():

    with c:

        datetime.datetime.strptime("20100101","%Y%m%d")

 

RLock参考