什么是pipenv

• pipenv是requests作者的一个项目, 整合了virtualenv, pip, pipfile, 用于更方便地为项目建立虚拟环境并管理虚拟环境中的第三方模块.
• 虚拟环境可以隔离各种python项目所需要的不同的环境，可以利用python2和python3分别创建虚拟环境，同时运行python2,3的项目

环境：

• python3.6.4
• win10

安装pipenv

• 启动win10终端，命令行输入 pip install pipenv ,过程大概需要一两分钟，具体网络情况而定
• 安装完成显示：

• Collecting pipenvUsing cached pipenv-11.9.0.tar.gz
  Requirement already satisfied: pip>=9.0.1 in d:\python\python3.6.4\lib\site-packages (from pipenv)
  Requirement already satisfied: certifi in d:\python\python3.6.4\lib\site-packages (from pipenv)
  Requirement already satisfied: setuptools>=36.2.1 in d:\python\python3.6.4\lib\site-packages (from pipenv)
  Requirement already satisfied: virtualenv-clone>=0.2.5 in d:\python\python3.6.4\lib\site-packages (from pipenv)
  Requirement already satisfied: virtualenv in d:\python\python3.6.4\lib\site-packages (from pipenv)
  Installing collected packages: pipenvRunning setup.py install for pipenv ... done
  Successfully installed pipenv-11.9.0
  复制代码

给项目安装虚拟环境

• 进入项目目录下面（安装pipenv的时候是在全局安装，此时安装项目虚拟环境需要到你的项目目录下面安装）
• 输入命令： pipenv install
• 安装完成后显示：

• Creating a virtualenv for this project…
  Using d:\python\python3.6.4\python.exe (3.6.4) to create virtualenv…
  Already using interpreter d:\python\python3.6.4\python.exe
  Using base prefix 'd:\\python\\python3.6.4'
  New python executable in D:\Python\virtualenv\envs\fisher-X6ixkNQM\Scripts\python.exe
  Installing setuptools, pip, wheel...done.Virtualenv location: D:\Python\virtualenv\envs\fisher-X6ixkNQM
  Creating a Pipfile for this project…
  Pipfile.lock not found, creating…
  Locking [dev-packages] dependencies…
  Locking [packages] dependencies…
  Updated Pipfile.lock (625834)!
  Installing dependencies from Pipfile.lock (625834)…================================ 0/0 - 00:00:00
  To activate this project's virtualenv, run the following:$ pipenv shell
  复制代码

激活虚拟环境

• 输入命令： pipenv shell （退出命令：exit）
• 一两秒后完成显示：

• Launching subshell in virtual environment. Type 'exit' to return.
  Microsoft Windows [版本 10.0.16299.309]
  (c) 2017 Microsoft Corporation。保留所有权利。
  复制代码

• 激活之后就可以在虚拟环境里面搭建项目所需要的环境，安装各种包了，下面以flask为例

安装flask

• 进入虚拟环境之后，输入命令：pipenv install flask
• 过程大概十秒左右，完成后显示：

• Installing flask…
  Collecting flaskDownloading Flask-0.12.2-py2.py3-none-any.whl (83kB)
  Collecting click>=2.0 (from flask)Downloading click-6.7-py2.py3-none-any.whl (71kB)
  Collecting Jinja2>=2.4 (from flask)Downloading Jinja2-2.10-py2.py3-none-any.whl (126kB)
  Collecting itsdangerous>=0.21 (from flask)Downloading itsdangerous-0.24.tar.gz (46kB)
  Collecting Werkzeug>=0.7 (from flask)Downloading Werkzeug-0.14.1-py2.py3-none-any.whl (322kB)
  Collecting MarkupSafe>=0.23 (from Jinja2>=2.4->flask)Downloading MarkupSafe-1.0.tar.gz
  Building wheels for collected packages: itsdangerous, MarkupSafeRunning setup.py bdist_wheel for itsdangerous: startedRunning setup.py bdist_wheel for itsdangerous: finished with status 'done'Stored in directory: C:\Users\储劲松\AppData\Local\pip\Cache\wheels\fc\a8\66\24d655233c757e178d45dea2de22a04c6d92766abfb741129aRunning setup.py bdist_wheel for MarkupSafe: startedRunning setup.py bdist_wheel for MarkupSafe: finished with status 'done'Stored in directory: C:\Users\储劲松\AppData\Local\pip\Cache\wheels\88\a7\30\e39a54a87bcbe25308fa3ca64e8ddc75d9b3e5afa21ee32d57
  Successfully built itsdangerous MarkupSafe
  Installing collected packages: click, MarkupSafe, Jinja2, itsdangerous, Werkzeug, flask
  Successfully installed Jinja2-2.10 MarkupSafe-1.0 Werkzeug-0.14.1 click-6.7 flask-0.12.2 itsdangerous-0.24Adding flask to Pipfile's [packages]…
  Pipfile.lock (625834) out of date, updating to (011179)…
  Locking [dev-packages] dependencies…
  Locking [packages] dependencies…
  Updated Pipfile.lock (011179)!
  Installing dependencies from Pipfile.lock (011179)…================================ 6/6 - 00:00:01
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• 可以使用 flask 命令查看是否安装成功，或者输入 pip list 查看该虚拟环境下所有安装的包

pipenv 常用命令：

• pipenv shell 激活虚拟环境
• exit 退出虚拟环境
• pipenv install *** 安装包
• pipenv uninstall *** 卸载包
• pipenv graph 查看安装包的依赖关系
• pipenv --venv 查看虚拟环境安装目录
• 更过的命令可以查看github 连接

小生刚刚入门python,以此记录学习的过程，如有错误之处，欢迎指出