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

sudo pip install 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...

任何帮助都将不胜感激。

Answer 1

如果没有安装烧瓶：

pip install flask

然后

import flask

Answer 2

就我而言，我已经安装了烧瓶。我遇到了同样的错误，但这对我有用：

import flask
from flask import Flask

只是发布此内容，以防它可以帮助其他人。：）

Answer 3

问题的答案是：

如果您的导入语句是这样-
```
from flask import Flask

app = flask.Flask(name)
```
然后它将给出错误：

NameError：名称“ flask”未定义
如果您的导入语句是这样-

导入烧瓶

app = Flask（name）

然后它将给出错误：

NameError：名称“ Flask”未定义

* *上述错误的解决方案-* *

如果未安装，请通过pip install flask安装flask。

下面的代码将解决您的问题。

from flask import Flask
app = Flask(name)

OR

import flask
app = flask.Flask(name)

NameError：未定义名称'flask'

3 个答案: