python / flask : TypeError: an integer is required (got type str)

Question

我是 python 和 flask 的新手。我正在尝试通过 http://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-i-hello-world 上的 Flask 教程进行工作。 .我遇到了一个我无法弄清楚的错误。我已经竭尽全力(我认为)寻找解决方案，但找不到适合我问题的解决方案。我已经卸载并重新安装了 flask 。我什至创建了一个新的 venv 并重新开始，但没有任何效果。

我正在尝试构建一个简单的网络表单应用程序。我创建了一个表格，例如:

from flask_wtf import Form  
from wtforms import StringField, BooleanField  
from wtforms.validators import DataRequired

class LoginForm(Form):
    openid = StringField('openid', validators=[DataRequired()])
    remember_me = BooleanField('remember_me', default=False)

当我导入 LoginForm 时，出现错误

TypeError: an integer is required (got type str)

完整的堆栈跟踪在这里:

C:\microblog\flask\Scripts\python.exe C:/microblog/run.py
Traceback (most recent call last):
  File "C:/microblog/run.py", line 2, in <module>
    from app import app
  File "C:\microblog\app\__init__.py", line 6, in <module>
    from app import views
  File "C:\microblog\app\views.py", line 5, in <module>
    from .forms import LoginForm
  File "C:\microblog\app\forms.py", line 3, in <module>
    from flask_wtf import Form
  File "C:\microblog\flask\lib\site-packages\flask_wtf\__init__.py", line 15, in <module>
    from .form import Form
  File "C:\microblog\flask\lib\site-packages\flask_wtf\form.py", line 15, in <module>
    from .i18n import translations
  File "C:\microblog\flask\lib\site-packages\flask_wtf\i18n.py", line 12, in <module>
    from flask_babel import get_locale
  File "C:\microblog\flask\lib\site-packages\flask_babel\__init__.py", line 21, in <module>
    from babel import dates, numbers, support, Locale
  File "C:\microblog\flask\lib\site-packages\babel\dates.py", line 28, in <module>
    from babel.util import UTC, LOCALTZ
  File "C:\microblog\flask\lib\site-packages\babel\util.py", line 278, in <module>
    from babel import localtime
  File "C:\microblog\flask\lib\site-packages\babel\localtime\__init__.py", line 21, in <module>
from babel.localtime._win32 import _get_localzone
  File "C:\microblog\flask\lib\site-packages\babel\localtime\_win32.py", line 18, in <module>
    tz_names = get_global('windows_zone_mapping')
  File "C:\microblog\flask\lib\site-packages\babel\core.py", line 58, in get_global
    _global_data = pickle.load(fileobj)
TypeError: an integer is required (got type str)

感谢任何帮助 - 这让我抓狂!

Answer 1

这是 python 包索引上的 babel 2.0 包中的构建错误

https://github.com/mitsuhiko/babel/issues/174

总而言之，包中包含一个 pickled 文件 babel/global.dat，python 3 无法读取该文件，因为它是由在 python 2 下运行的脚本创建的。

我按照 github 问题中的建议，通过从 github 而不是 PyPI 安装来解决这个问题:

pip install git+https://github.com/mitsuhiko/babel.git@2.0