# 报错信息
AttributeError: 'module' object has no attribute '_strptime'
# 报错原因
页面多个 ajax 请求到后台，同时调用一个公共方法，公共方法内有调用
datetime.datetime.strptime(from_date, '%Y-%m-%d')
# 问题重现及解决
def parse_date1(date_str): | |
"""method 1: import datetime for each thread""" | |
import datetime | |
thread_name = threading.current_thread().getName() | |
print('thread name: %s' % thread_name) | |
result = datetime.datetime.strptime(date_str, '%Y-%m-%d %H:%M:%S') | |
print('thread %s parse result is %s' % (thread_name, result)) | |
c = threading.RLock() | |
def parse_date2(date_str): | |
"""method 2: with re-entrant lock""" | |
with c: | |
thread_name = threading.current_thread().getName() | |
print('thread name: %s' % thread_name) | |
result = datetime.datetime.strptime(date_str, '%Y-%m-%d %H:%M:%S') | |
print('thread %s parse result is %s' % (thread_name, result)) | |
def parse_date3(date_str): | |
"""method 3: import _strptime""" | |
import _strptime | |
thread_name = threading.current_thread().getName() | |
print('thread name: %s' % thread_name) | |
result = datetime.datetime.strptime(date_str, '%Y-%m-%d %H:%M:%S') | |
print('thread %s parse result is %s' % (thread_name, result)) | |
lock = threading.RLock() | |
def parse_date4(date_str): | |
"""method 4: import re-entrant lock, acquire and release""" | |
lock.acquire() | |
thread_name = threading.current_thread().getName() | |
print('thread name: %s' % thread_name) | |
result = datetime.datetime.strptime(date_str, '%Y-%m-%d %H:%M:%S') | |
print('thread %s parse result is %s' % (thread_name, result)) | |
lock.release() | |
# method 5：upgrade to python3 | |
def create_thread(): | |
date_str = "2020-07-16 04:23:02" | |
threads = [] | |
for i in range(5): | |
thread = threading.Thread(target=parse_date1, args=(date_str,)) | |
threads.append(thread) | |
for t in threads: | |
t.start() | |
for t in threads: | |
t.join() | |
print('threads run complete.') | |
if __name__ == '__main__': | |
create_thread() |
