如何修复app engine项目中的“ValueError:unknown locale:UTF8”？

Question

我在Python3.7应用引擎项目（Mac OS Mojave）中寻找以下bug的解决方案：

ValueError: unknown locale: UTF-8

我已经尝试了here（对我的~/.bash_profile文件的编辑）列出的所有解决方案，但没有运气。在

可能是因为在我的例子中，这个bug发生在appengine环境中，所以这些建议的修复不起作用吗？在

完整回溯：

[2019-05-13 07:48:37,563] ERROR in app: Exception on /api/get_accounts [POST]
Traceback (most recent call last):
  File "/private/var/folders/jj/9jn8lbt17kgfhr_dqdz6gd180000gn/T/tmpXEC0bT/lib/python3.7/site-packages/flask/app.py", line 2292, in wsgi_app
    response = self.full_dispatch_request()
  File "/private/var/folders/jj/9jn8lbt17kgfhr_dqdz6gd180000gn/T/tmpXEC0bT/lib/python3.7/site-packages/flask/app.py", line 1815, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/private/var/folders/jj/9jn8lbt17kgfhr_dqdz6gd180000gn/T/tmpXEC0bT/lib/python3.7/site-packages/flask_cors/extension.py", line 161, in wrapped_function
    return cors_after_request(app.make_response(f(*args, **kwargs)))
  File "/private/var/folders/jj/9jn8lbt17kgfhr_dqdz6gd180000gn/T/tmpXEC0bT/lib/python3.7/site-packages/flask/app.py", line 1718, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/private/var/folders/jj/9jn8lbt17kgfhr_dqdz6gd180000gn/T/tmpXEC0bT/lib/python3.7/site-packages/flask/_compat.py", line 35, in reraise
    raise value
  File "/private/var/folders/jj/9jn8lbt17kgfhr_dqdz6gd180000gn/T/tmpXEC0bT/lib/python3.7/site-packages/flask/app.py", line 1813, in full_dispatch_request
    rv = self.dispatch_request()
  File "/private/var/folders/jj/9jn8lbt17kgfhr_dqdz6gd180000gn/T/tmpXEC0bT/lib/python3.7/site-packages/flask/app.py", line 1799, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/Users/.../googleAdsApi/main.py", line 61, in get_all_accounts
    accounts = get_accounts(creds)
  File "/Users/.../googleAdsApi/services/get_accounts.py", line 7, in get_accounts
    client = get_client(creds)
  File "/Users/.../googleAdsApi/services/clients.py", line 58, in get_client
    return adwords.AdWordsClient(DEVELOPER_TOKEN, oauth2_client, USER_AGENT, cache=ZeepServiceProxy.NO_CACHE)
  File "/private/var/folders/jj/9jn8lbt17kgfhr_dqdz6gd180000gn/T/tmpXEC0bT/lib/python3.7/site-packages/googleads/adwords.py", line 241, in __init__
    super(AdWordsClient, self).__init__()
  File "/private/var/folders/jj/9jn8lbt17kgfhr_dqdz6gd180000gn/T/tmpXEC0bT/lib/python3.7/site-packages/googleads/common.py", line 152, in __init__
    _, encoding = locale.getdefaultlocale()
  File "/usr/local/Cellar/python/3.7.3/Frameworks/Python.framework/Versions/3.7/lib/python3.7/locale.py", line 568, in getdefaultlocale
    return _parse_localename(localename)
  File "/usr/local/Cellar/python/3.7.3/Frameworks/Python.framework/Versions/3.7/lib/python3.7/locale.py", line 495, in _parse_localename
    raise ValueError('unknown locale: %s' % localename)
ValueError: unknown locale: UTF-8
INFO     2019-05-13 06:48:37,661 module.py:861] default: "POST /api/get_accounts HTTP/1.1" 500 290

app engine项目中似乎出了什么问题：

根据上面的回溯，我使用的一个库（googleads）似乎试图通过locale.getdefaultlocale()获取我的语言环境，结果导致了错误。在

是什么让我怀疑这个bug是app engine特有的：

当我在终端中输入以下命令时（使用与app engine环境中相同的python3.7）：

^{pr2}$

它返回：

('en_US', 'UTF-8')  

换句话说，当我从终端调用它时，相同的locale.getdefaultlocale()工作正常，但是在appengine环境中崩溃了。在