Question

from flask import Flask

app = Flask(__name__)

@app.route("/")
def index():
    return "This is the homepage"

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

在IDLE中运行此烧瓶程序时，收到以下错误消息：

Traceback (most recent call last):
  File "/Users/Arnav/Documents/flaskpractice.py", line 1, in <module>
    from flask import Flask
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/flask/__init__.py", line 21, in <module>
    from .app import Flask, Request, Response
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/flask/app.py", line 19, in <module>
    from werkzeug.routing import Map, Rule, RequestRedirect, BuildError
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/werkzeug/routing.py", line 103, in <module>
    from pprint import pformat
ImportError: cannot import name pformat

我正在使用Python 2.7.13并且我安装了烧瓶。我试过谷歌搜索错误，但没有得到修复。请帮帮我

Answer 1

为了从virtualenv运行一个烧瓶应用程序，您可以创建一个文件run_idle.py文件，并从与烧瓶应用程序相同的目录中启动它。将其放入run_idle.py并使用python run_idle.py：

运行它

from idlelib.PyShell import main

if __name__ == '__main__':
    main()

它将从virtualenv运行IDLE，以便它将看到安装了该烧瓶。请注意，您需要在使用以下命令运行IDLE之前激活virtualenv：

. env/bin/activate

获取ImportError：运行Flask App时无法导入名称pformat。我正在使用Python 2.7.13并安装了flask

1 个答案: