python利用pip安装包注意事项

1.需要把pip升级后再安装

相关命令

python -m pip install --upgrade pip

pip install --upgrade pip
pip install --upgrade wheel

注：部分软件需要使用pip3安装

eg:

pip3 install aiohttp

例如安装图像包

pip install Pillow

安装mysql

pip install mysql-connector-python-rf --allow-external mysql-connector-python

安装sqlalchemy--ORM数据库

 pip install sqlalchemy

C:\Users\basycai>python -m pip install --upgrade pip
Collecting pip
  Downloading pip-8.1.2-py2.py3-none-any.whl (1.2MB)
    100% |████████████████████████████████| 1.2MB 379kB/s
Installing collected packages: pip
  Found existing installation: pip 7.1.2
    Uninstalling pip-7.1.2:
      Successfully uninstalled pip-7.1.2
Successfully installed pip-8.1.2

C:\Users\basycai>pip install Pillow
Collecting Pillow
  Downloading Pillow-3.3.1-cp35-cp35m-win_amd64.whl (1.5MB)
    100% |████████████████████████████████| 1.5MB 144kB/s
Installing collected packages: Pillow
Successfully installed Pillow-3.3.1