Python33， flask : Lot of Errors starting Hello World

Question

我刚刚在我的窗口系统上安装了 pip Flask 和 HTML5。当我使用 IDLE 启动 Hello World! 程序时，我在 Firefox 的新选项卡中得到了正确的文本。而且 Python shell 中也有很多错误消息:

    Traceback (most recent call last):
      File "<frozen importlib._bootstrap>", line 1519, in _find_and_load_unlocked
    AttributeError: 'module' object has no attribute '__path__'

During handling of the above exception, another exception occurred:

    Traceback (most recent call last):
      File "C:\Python33\lib\site-packages\werkzeug\utils.py", line 18, in <module>
        from html.entities import name2codepoint
    ImportError: No module named 'html.entities'; html is not a package

During handling of the above exception, another exception occurred:

    Traceback (most recent call last):
      File "C:/Users/Public/python/testflask.py", line 13, in <module>
        from flask import Flask
      File "C:\Python33\lib\site-packages\flask\__init__.py", line 17, in <module>
        from werkzeug.exceptions import abort
      File "C:\Python33\lib\site-packages\werkzeug\__init__.py", line 154, in <module>
        __import__('werkzeug.exceptions')
      File "C:\Python33\lib\site-packages\werkzeug\exceptions.py", line 71, in <module>
        from werkzeug.wrappers import Response
      File "C:\Python33\lib\site-packages\werkzeug\wrappers.py", line 36, in <module>
        from werkzeug.utils import cached_property, environ_property, \
      File "C:\Python33\lib\site-packages\werkzeug\utils.py", line 20, in <module>
        from htmlentitydefs import name2codepoint
    ImportError: No module named 'htmlentitydefs'

救命啊!帮助!救命!

Answer 1

您有一个本地 html.py 模块或 html 包来屏蔽内置库。重命名它，因为它破坏了依赖标准库版本的软件。

您可以通过以下方式找到需要重命名或移至一边的文件:

import html
print(html)

将该文件重命名为其他名称。考虑到可能还有一个 .pyc 文件；全部删除 .pyc 字节码缓存(如果存在)。