Python ValueError:导入flask_wtf时，源代码字符串不能包含空字节

我正在尝试在网站上创建“用户注册”表单。尝试使用以下输入导入升华文本3中的flask_wtf模块时：

import flask_wtf

我得到以下错误：

    Traceback (most recent call last):
  File "C:\Users\Aadish\Desktop\Python Course Udemy\practice\Flask_blog\forms.py", line 1, in <module>
    import flask_wtf
  File "C:\Users\Aadish\AppData\Local\Programs\Python\Python39\lib\site-packages\flask_wtf\__init__.py", line 3, in <module>
    from .csrf import CSRFProtect, CsrfProtect
  File "C:\Users\Aadish\AppData\Local\Programs\Python\Python39\lib\site-packages\flask_wtf\csrf.py", line 11, in <module>
    from wtforms import ValidationError
  File "C:\Users\Aadish\AppData\Local\Programs\Python\Python39\lib\site-packages\wtforms\__init__.py", line 11, in <module>
    from wtforms import validators, widgets
  File "C:\Users\Aadish\AppData\Local\Programs\Python\Python39\lib\site-packages\wtforms\validators.py", line 9, in <module>
    import email_validator
  File "C:\Users\Aadish\AppData\Local\Programs\Python\Python39\lib\site-packages\email_validator\__init__.py", line 6, in <module>
    import dns.resolver
  File "C:\Users\Aadish\AppData\Local\Programs\Python\Python39\lib\site-packages\dns\resolver.py", line 36, in <module>
    import dns.message
  File "C:\Users\Aadish\AppData\Local\Programs\Python\Python39\lib\site-packages\dns\message.py", line 24, in <module>
    import dns.wire
  File "C:\Users\Aadish\AppData\Local\Programs\Python\Python39\lib\site-packages\dns\wire.py", line 7, in <module>
    import dns.name
  File "C:\Users\Aadish\AppData\Local\Programs\Python\Python39\lib\site-packages\dns\name.py", line 26, in <module>
    import idna          # type: ignore
ValueError: source code string cannot contain null bytes

回溯（最近一次呼叫最后一次）：
文件“C:\Users\Aadish\Desktop\Python课程Udemy\practice\Flask\u blog\forms.py”，第1行，在
进口烧瓶
文件“C:\Users\Aadish\AppData\Local\Programs\Python\Python39\lib\site packages\flask\u wtf\\uuuuuu init\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu
从.csrf导入CSRFProtect，CSRFProtect
文件“C:\Users\Aadish\AppData\Local\Programs\Python\Python39\lib\site packages\flask\u wtf\csrf.py”，第11行，在
从wtforms导入验证错误
文件“C:\Users\Aadish\AppData\Local\Programs\Python\Python39\lib\site packages\wtforms\\uuuuuu init\uuuuuu.py”，第11行，在
从wtforms导入验证程序、小部件
文件“C:\Users\Aadish\AppData\Local\Programs\Python\Python39\lib\site packages\wtforms\validators.py”，第9行，在
导入电子邮件验证程序
文件“C:\Users\Aadish\AppData\Local\Programs\Python\Python39\lib\site packages\email\u validator\uuuuu init\uuuuu.py”，第6行，在
导入dns.resolver
文件“C:\Users\Aadish\AppData\Local\Programs\Python\Python39\lib\site packages\dns\resolver.py”，第36行，在
导入dns.message
文件“C:\Users\Aadish\AppData\Local\Programs\Python\Python39\lib\site packages\dns\message.py”，第24行，在
导入dns.wire
文件“C:\Users\Aadish\AppData\Local\Programs\Python\Python39\lib\site packages\dns\wire.py”，第7行，在
导入dns.name
文件“C:\Users\Aadish\AppData\Local\Programs\Python\Python39\lib\site packages\dns\name.py”，第26行，在
导入idna#类型：忽略
ValueError:源代码字符串不能包含空字节

看起来您的源文件乱七八糟。尝试重新安装

dns

库。如果没有帮助，请手动编辑文件

C:\Users\Aadish\AppData\Local\Programs\Python39\lib\site packages\dns\name.py

以修复此问题。

我尝试重新安装“dns”。然而，这没有帮助。我试图手动编辑该文件，但找不到错误（我是编程新手）。所以我最终重新安装了python本身。现在问题解决了。谢谢你的帮助。