Question

我第一次尝试使用flask和python来创建一个Web应用程序。我在Windows 10上使用Cygwin;出于某种原因，即使我已经使用pip成功安装了烧瓶：

$ pip install flask
Requirement already satisfied (use --upgrade to upgrade): flask in c:\python34\l                                                                                                                ib\site-packages
Requirement already satisfied (use --upgrade to upgrade): click>=2.0 in c:\pytho                                                                                                                n34\lib\site-packages (from flask)
Requirement already satisfied (use --upgrade to upgrade): Jinja2>=2.4 in c:\pyth                                                                                                                on34\lib\site-packages (from flask)
Requirement already satisfied (use --upgrade to upgrade): itsdangerous>=0.21 in                                                                                                                 c:\python34\lib\site-packages (from flask)
Requirement already satisfied (use --upgrade to upgrade): Werkzeug>=0.7 in c:\py                                                                                                                thon34\lib\site-packages (from flask)
Requirement already satisfied (use --upgrade to upgrade): MarkupSafe>=0.23 in c:                                                                                                                \python34\lib\site-packages (from Jinja2>=2.4->flask)
You are using pip version 7.1.2, however version 9.0.1 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' comm                                                                                                             and.

运行python app.py时仍然出现此错误：

$ python app.py
Traceback (most recent call last):
  File "app.py", line 1, in <module>
    from flask import Flask
ImportError: No module named flask

任何想法？很抱歉，如果这是一个愚蠢的问题，那就很新了。

Answer 1

您需要创建一个virtualenv，然后在其中安装pip。

virtualenv flasktest

下，

cd flasktest

然后，

source bin/activate

最后，

pip install flask

你应该善于运行烧瓶（仅在virtualenv中，它不会在它之外工作。）

Answer 2

如果您不想使用virtualenv，请尝试使用

python -m pip install --upgrade pip
python -m pip install flask

安装烧瓶成功，仍然导致导入错误

2 个答案: