为什么运行此 Dash 应用程序会产生 TypeError

Question

我收到以下错误：

"Traceback (most recent call last):

  File "app.py", line 11, in <module>

    app = dash.Dash()

  File "C:\Users\oefel\AppData\Local\Programs\Python\Python38-32\lib\site-packages\dash\dash.py", line 268, in __init__

self.server = flask.Flask(name) if server else None

  File "C:\Users\oefel\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flask\app.py", line 559, in __init__

self.add_url_rule(

  File "C:\Users\oefel\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flask\app.py", line 67, in wrapper_func

    return f(self, *args, **kwargs)

  File "C:\Users\oefel\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flask\app.py", line 1217, in add_url_rule

    self.url_map.add(rule)

  File "C:\Users\oefel\AppData\Local\Programs\Python\Python38-32\lib\site-packages\werkzeug\routing.py", line 1388, in 

add

    rule.bind(self)

  File "C:\Users\oefel\AppData\Local\Programs\Python\Python38-32\lib\site-packages\werkzeug\routing.py", line 730, in bind

    self.compile()

  File "C:\Users\oefel\AppData\Local\Programs\Python\Python38-32\lib\site-packages\werkzeug\routing.py", line 794, in compile

    self._build = self._compile_builder(False).__get__(self, None)

  File "C:\Users\oefel\AppData\Local\Programs\Python\Python38-32\lib\site-packages\werkzeug\routing.py", line 951, in _compile_builder

    code = compile(module, "<werkzeug routing>", "exec")

TypeError: required field "type_ignores" missing from Module"

在运行 Dash 应用程序时。这是我的代码：

import dash

from dash.dependencies import Input, Output

import dash_renderer

import dash_html_components as html  # div_tags

import dash_core_components as dcc  # graphs

import plotly

app = dash.Dash()

colors = {

    'background': '#111111',

    'text': '#7FDBFF'

}

app.layout = html.Div(style={'backgroundColor': colors['background']}, children=[

    html.H1(

        children='Hello Dash',

        style={

            'textAlign': 'center',

            'color': colors['text']

        }

    ),

我进行了一些搜索，但没有发现任何可以表明此错误含义的信息。谁能提供任何见解？谢谢你！

Answer 1

您需要更新您的 Werkzeug 版本以兼容 Python 3.8。