Flask 错误 werkzeug 路由故障排除

Question

我正在按照教程做最简单的 "Hello World" Flask 应用程序，如下所述： https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-i-hello-world

为了上下文，我在 C 驱动器的根目录下创建了目录以避免潜在的路径问题。我是运行ning Python 3.8 和 Flask 1.0.2 和 werkzeug 0.15.2

在发出 flask 命令之前，我做了两件事。创建虚拟环境并安装本地flask版本

$ python -m venv venv
$ venv\Scripts\activate
(venv) $ pip install flask

同时设置 FLASK_APP 环境变量

(venv) $ set FLASK_APP=microblog.py

当我发出 "flask run" 命令时，顶级脚本是运行（内容在这里）

from app import app

它调用应用程序文件夹中的 __init__.py 文件，其中包含：

from flask import Flask

app = Flask(__name__) #The name "app" is being passed

from app import routes

第二行失败并输出以下错误：

Traceback (most recent call last):
  File "C:\Python38\lib\runpy.py", line 192, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "C:\Python38\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\microblog\venv\Scripts\flask.exe\__main__.py", line 9, in <module>
  File "c:\microblog\venv\lib\site-packages\flask\cli.py", line 894, in main
    cli.main(args=args, prog_name=name)
  File "c:\microblog\venv\lib\site-packages\flask\cli.py", line 557, in main
    return super(FlaskGroup, self).main(*args, **kwargs)
  File "c:\microblog\venv\lib\site-packages\click\core.py", line 717, in main
    rv = self.invoke(ctx)
  File "c:\microblog\venv\lib\site-packages\click\core.py", line 1137, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "c:\microblog\venv\lib\site-packages\click\core.py", line 956, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "c:\microblog\venv\lib\site-packages\click\core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "c:\microblog\venv\lib\site-packages\click\decorators.py", line 64, in new_func
    return ctx.invoke(f, obj, *args, **kwargs)
  File "c:\microblog\venv\lib\site-packages\click\core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "c:\microblog\venv\lib\site-packages\flask\cli.py", line 767, in run_command
    app = DispatchingApp(info.load_app, use_eager_loading=eager_loading)
  File "c:\microblog\venv\lib\site-packages\flask\cli.py", line 293, in __init__
    self._load_unlocked()
  File "c:\microblog\venv\lib\site-packages\flask\cli.py", line 317, in _load_unlocked
    self._app = rv = self.loader()
  File "c:\microblog\venv\lib\site-packages\flask\cli.py", line 372, in load_app
    app = locate_app(self, import_name, name)
  File "c:\microblog\venv\lib\site-packages\flask\cli.py", line 235, in locate_app
    __import__(module_name)
  File "c:\microblog\microblog.py", line 1, in <module>
    from app import app
  File "c:\microblog\app\__init__.py", line 5, in <module>
    app = Flask(__name__) #The name "app" is being passed
  File "c:\microblog\venv\lib\site-packages\flask\app.py", line 558, in __init__
    self.add_url_rule(
  File "c:\microblog\venv\lib\site-packages\flask\app.py", line 66, in wrapper_func
    return f(self, *args, **kwargs)
  File "c:\microblog\venv\lib\site-packages\flask\app.py", line 1216, in add_url_rule
    self.url_map.add(rule)
  File "c:\microblog\venv\lib\site-packages\werkzeug\routing.py", line 1562, in add
    rule.bind(self)
  File "c:\microblog\venv\lib\site-packages\werkzeug\routing.py", line 711, in bind
    self.compile()
  File "c:\microblog\venv\lib\site-packages\werkzeug\routing.py", line 767, in compile
    self._build = self._compile_builder(False)
  File "c:\microblog\venv\lib\site-packages\werkzeug\routing.py", line 1128, in _compile_builder
    return self.BuilderCompiler(self).compile(append_unknown)
  File "c:\microblog\venv\lib\site-packages\werkzeug\routing.py", line 1119, in compile
    co = types.CodeType(*code_args)
TypeError: code() takes at least 14 arguments (13 given)

除了下面的答案之外，请确保您的 PATH 变量设置正确。就我而言，我有一个 Anaconda 安装和一个常规的 Python 安装，但它们的版本存在冲突。最后通过Anaconda Prompt申请运行。要解决此类问题，请尝试将 bash_profile 中的 Anaconda 路径添加到 windows

中的 PATH 变量中

装瓶快乐 :)！

Answer 1

我启动了服务器运行。这是我的项目结构：

.
├── app
│   ├── __init__.py
│   └── routes.py
├── microblog.py
└── venv

下面是他在教程中提到的三个源文件

__init.py__⬇️

from flask import Flask

app = Flask(__name__)

from app import routes

routes.py⬇️

from app import app

@app.route('/')
@app.route('/index')
def index():
    return "Hello, World!"

microblog.py⬇️

from app import app

设置好源码后，我运行export FLASK_APP=microblog.py然后运行flask run。在 flask run，你应该看到这样的东西：

这是我这边的依赖版本：

Answer 2

看起来 flask（werkzeug 模块）与 python3.8 不兼容 github issue 如果您使用的是 werkzeug <0.15.5，请考虑降级到 python 3.7（并指向python3 link 从虚拟环境到 python3.7) 或者将你的 werkzeug 模块升级到 0.15.5 或更高版本。

Flask 错误 werkzeug 路由故障排除

Troubleshooting Flask error werkzeug routing

python

python-3.x

flask

werkzeug