python - 名称错误 : name 'flask' is not defined

Question

我在终端中运行这行代码时遇到问题:

$ sudo python app.py 

回溯是:

Traceback (most recent call last):

  File "app.py", line 7, in <module>

   APP = flask.Flask(__name__)

NameError: name 'flask' is not defined

须藤 pip 安装 flask

Requirement already satisfied (use --upgrade to upgrade): flask in 

/usr/local/lib/python2.7/dist-packages

Requirement already satisfied (use --upgrade to upgrade): Werkzeug>=0.7 in 

/usr/local/lib/python2.7/dist-packages (from flask)

Requirement already satisfied (use --upgrade to upgrade): Jinja2>=2.4 in 

/usr/local/lib/python2.7/dist-packages (from flask)

Requirement already satisfied (use --upgrade to upgrade): 

itsdangerous>=0.21 in /usr/local/lib/python2.7/dist-packages (from flask)

Requirement already satisfied (use --upgrade to upgrade): markupsafe in 

/usr/lib/python2.7/dist-packages (from Jinja2>=2.4->flask)

Cleaning up...

任何帮助，将不胜感激。

Answer 1

如果未安装 flask :

pip install flask

然后

import flask