Basic Flask app not running (TypeError: required field "type_ignores" missing from Module)

Question

我有一个非常基本的 Flask 应用程序，其中安装了我的 requirements.txt 的依赖项。所有这些依赖项都安装在我的虚拟环境中。

requirements.txt下面给出，

aniso8601==6.0.0
Click==7.0
Flask==1.0.3
Flask-Cors==3.0.7
Flask-RESTful==0.3.7
Flask-SQLAlchemy==2.4.0
itsdangerous==1.1.0
Jinja2==2.10.1
MarkupSafe==1.1.1
# psycopg2-binary==2.8.2
pytz==2019.1
six==1.12.0
# SQLAlchemy==1.3.4
Werkzeug==0.15.4
python-dotenv
requests
authlib

我的代码在 NewTest.py 文件中，

from flask import Flask, request, jsonify, abort, url_for

app = Flask(__name__)

@app.route('/')
def index():
    return jsonify({
        'success': True,
        'index': 'Test Pass'
    })



if __name__ == '__main__':
    app.run(debug=True)

当我运行应用程序通过时，

export FLASK_APP=NewTest.py
export FLASK_ENV=development
export FLASK_DEBUG=true

    flask run
or flask run --reload

我收到以下错误，

127.0.0.1 - - [09/Feb/2020 12:43:40] "GET / HTTP/1.1" 500 -
Traceback (most recent call last):
  File "/projects/env/lib/python3.8/site-packages/flask/_compat.py", line 36, i
n reraise
    raise value
  File "/projects/NewTest.py", line 3, in <module>
    app = Flask(__name__)
  File "/projects/env/lib/python3.8/site-packages/flask/app.py", line 559, in _
_init__
    self.add_url_rule(
  File "/projects/env/lib/python3.8/site-packages/flask/app.py", line 67, in wr
apper_func
    return f(self, *args, **kwargs)
  File "/projects/env/lib/python3.8/site-packages/flask/app.py", line 1217, in 
add_url_rule
    self.url_map.add(rule)
  File "/projects/env/lib/python3.8/site-packages/werkzeug/routing.py", line 1388, in add
    rule.bind(self)
  File "/projects/env/lib/python3.8/site-packages/werkzeug/routing.py", line 730, in bind
    self.compile()
  File "/projects/env/lib/python3.8/site-packages/werkzeug/routing.py", line 794, in compile
    self._build = self._compile_builder(False).__get__(self, None)
  File "/projects/env/lib/python3.8/site-packages/werkzeug/routing.py", line 951, in _compile_builder
    code = compile(module, "<werkzeug routing>", "exec")
TypeError: required field "type_ignores" missing from Module

谁能指出我遗漏了什么或做错了什么，我该如何解决？谢谢

Answer 1

此错误已在 werkzeug 0.15.5 中修复。从 0.15.4 升级到更高版本。

Answer 2

我在 django shell 中遇到错误，似乎 ipython 中存在错误。最后，我决定暂时删除 ipython，直到错误修复

pip uninstall ipython

more info

Answer 3

我通过简单地在终端上执行以下代码行解决了这个错误：

sudo pip3 install --upgrade ipython

Answer 4

werkzeug 库可能有不同 python 版本的问题。

首先，将werkzeug库升级到最新，然后重试。

pip3 install --upgrade werkzeug

如果这不起作用，我认为您可能正在使用 python 版本，这会导致整个问题。

您始终可以创建具有特定 python 版本的 virtualenv [Install, Create, and Activate]，这样 werkzeug 就不会导致您出现此问题。

Answer 5

尝试

pip uninstall Flask

然后

pip install Flask

和

pip uninstall Werkzeug

然后

pip install Werkzeug

Basic Flask app not running (TypeError: required field "type_ignores" missing from Module)

Basic Flask app not running (TypeError: required field "type_ignores" missing from Module)

python

rest

virtualenv

flask

python-3.x