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我正在使用 datetime.strptime() 从一个月中获取月份编号,用全英文编写。我想将它与一些 PySide Qt 接口结合使用。但是,一旦我启动 QApplication,月份识别似乎就会中断。

最小工作示例(我正在打印语言环境以表明它不会改变):

import sys, datetime

from PySide.QtCore import *
from PySide.QtGui import *

import locale

print(locale.getlocale())
full_date = 'February'
print(datetime.datetime.strptime(full_date,'%B'))

输出:

('en_US', 'UTF-8')
1900-02-01 00:00:00

现在,当我启动 QApplication 并执行相同操作时:

import sys, datetime

from PySide.QtCore import *
from PySide.QtGui import *

import locale

qt_app = QApplication(sys.argv)

print(locale.getlocale())
full_date = 'February'
print(datetime.datetime.strptime(full_date,'%B'))

输出:

('en_US', 'UTF-8')
Traceback (most recent call last):
  File "my_timedate.py", line 12, in <module>
    print(datetime.datetime.strptime(full_date,'%B'))
  File "/usr/lib/python3.5/_strptime.py", line 510, in _strptime_datetime
    tt, fraction = _strptime(data_string, format)
  File "/usr/lib/python3.5/_strptime.py", line 343, in _strptime
    (data_string, format))
ValueError: time data 'February' does not match format '%B'

到底是怎么回事?为什么启动 QApplication 后它停止工作?

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