Flask第三篇——安装Flask

现在我们来安装Flask：

Windows系统安装Flask

如果你的系统是Windows，那安装起来非常方便——pip install flask

Mac系统安装Flask

Mac安装Flask一般为了不影响Python本身的功能会先下载一个虚拟环境，命令如下：

第一步：macbookdeMBP-2:~ macbook$ sudo easy_install virtualenv
第二步：macbookdeMBP-2:~ macbook$ virtualenv venv

会看到：

New python executable in /Users/macbook/venv/bin/python

Installing setuptools, pip, wheel...done.

第三步：激活虚拟环境

macbookdeMBP-2:~ macbook$ pwd

/Users/macbook

macbookdeMBP-2:~ macbook$ cd /Users/macbook

macbookdeMBP-2:~ macbook$ ls

Applications Downloads Music PycharmProjects

Desktop Library Pictures VirtualBox VMs

Documents Movies Public venv

macbookdeMBP-2:~ macbook$ cd venv

macbookdeMBP-2:venv macbook$ ls

bin lib

include pip-selfcheck.json

macbookdeMBP-2:venv macbook$ cd bin

macbookdeMBP-2:bin macbook$ ls

activate easy_install-2.7 python-config

activate.csh pip python2

activate.fish pip2 python2.7

activate_this.py pip2.7 wheel

easy_install python

macbookdeMBP-2:bin macbook$ source activate

至此，虚拟机已经激活

第四步：在虚拟环境下安装Flask

先回到venv目录下，然后安装

(venv) macbookdeMBP-2:bin macbook$ cd ..

(venv) macbookdeMBP-2:venv macbook$ cd..

(venv) macbookdeMBP-2:~ macbook$ ls

Applications Downloads Music PycharmProjects

Desktop Library Pictures VirtualBox VMs

Documents Movies Public venv

(venv) macbookdeMBP-2:~ macbook$ cd venv

(venv) macbookdeMBP-2:venv macbook$ ls

bin lib

include pip-selfcheck.json

(venv) macbookdeMBP-2:venv macbook$ pip install flask

安装后看到：

Collecting flask

  Downloading Flask-0.12.2-py2.py3-none-any.whl (83kB)

    100% |████████████████████████████████| 92kB 134kB/s

Collecting Jinja2>=2.4 (from flask)

  Downloading Jinja2-2.10-py2.py3-none-any.whl (126kB)

    100% |████████████████████████████████| 133kB 214kB/s

Collecting Werkzeug>=0.7 (from flask)

  Downloading Werkzeug-0.14.1-py2.py3-none-any.whl (322kB)

    100% |████████████████████████████████| 327kB 211kB/s

Collecting click>=2.0 (from flask)

  Downloading click-6.7-py2.py3-none-any.whl (71kB)

    100% |████████████████████████████████| 71kB 233kB/s

Collecting itsdangerous>=0.21 (from flask)

  Downloading itsdangerous-0.24.tar.gz (46kB)

    100% |████████████████████████████████| 51kB 492kB/s

Collecting MarkupSafe>=0.23 (from Jinja2>=2.4->flask)

  Downloading MarkupSafe-1.0.tar.gz

Building wheels for collected packages: itsdangerous, MarkupSafe

  Running setup.py bdist_wheel for itsdangerous ... done

  Stored in directory: /Users/macbook/Library/Caches/pip/wheels/fc/a8/66/24d655233c757e178d45dea2de22a04c6d92766abfb741129a

  Running setup.py bdist_wheel for MarkupSafe ... done

  Stored in directory: /Users/macbook/Library/Caches/pip/wheels/88/a7/30/e39a54a87bcbe25308fa3ca64e8ddc75d9b3e5afa21ee32d57

Successfully built itsdangerous MarkupSafe

Installing collected packages: MarkupSafe, Jinja2, Werkzeug, click, itsdangerous, flask

Successfully installed Jinja2-2.10 MarkupSafe-1.0 Werkzeug-0.14.1 click-6.7 flask-0.12.2 itsdangerous-0.24

至此，Flask安装完毕。

打开你的pycharm，新建项目，可以看到：

点击Create

就会生成Flask的模板了：

关于Mac安装Flask的方法大家可以看一下这篇帖子，或者自己百度一下：

http://blog.csdn.net/idoshi201109/article/details/79079572/

船长对Mac也不熟悉，说实话我自己安装的过程也是云里雾里，但是可以安装成功，具体原因我们不着急解释，毕竟影响不大，即使你不安装虚拟环境直接安装Flask也没有太大的影响（个人观点）。

如果你明白Mac安装虚拟环境和Flask的原理，还请不吝赐教！

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