解决Flask错误werkzeug路由

Question

我正在按照一个教程来制作最简单的“ Hello World” Flask应用程序，如所述： https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-i-hello-world

对于上下文，我已经在C驱动器的根目录下创建了目录，以避免潜在的路径问题。我正在运行Python 3.8和Flask 1.0.2和werkzeug 0.15.2

在发出flask命令之前，我正在做两件事。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

还要设置FLASK_APP环境变量

(venv) $ set FLASK_APP=microblog.py

当我发出“ flask run”命令时，将运行顶层脚本（内容在此处）

from app import app

将在包含以下内容的应用文件夹中调用__init__.py文件：

from flask import Flask

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

from app import routes

第二行失败并显示以下错误输出：

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)

除了以下答案外，请确保已正确设置PATH变量。就我而言，我有一个Anaconda安装和一个版本相互冲突的常规Python安装。最后，该应用程序遍历了Anaconda Prompt。要解决这种问题，请尝试将bash_profile中的Anaconda路径添加到Windows中的PATH变量中

快乐剥皮：）！

Answer 1

好像flask（werkzeug模块）与python3.8 github issue不兼容。如果您使用werkzeug <0.15.5，请考虑降级到python 3.7（并将python3链接从虚拟环境指向python3）。 7）或将您的werkzeug模块升级到0.15.5或更高版本。

Answer 2

我已启动服务器并正在运行。这是我的项目结构：

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

这是他在本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

设置源代码后，我先运行export FLASK_APP=microblog.py，然后再运行flask run。在flask run上，您应该看到以下内容：

以下是我的依赖项版本：