Python2.7.9以上、 Python3.4以上版本都自带pip工具。
pip下载地址：https://pypi.python.org/pypi/pip#downloads
通过命令判断是否已安装，可显示版本和路径：pip --version
D:pytest>pip --version pip 10.0.1 from D:pytestvenvlibsite-packagespip-10.0.1-py3.7.eggpip (python 3.7)
pip升级
D:pytest>pip install -U pip # 需要指定路径，系统给出了错误提示 ERROR: To modify pip, please run the following command: D:pytestvenvScriptspython.exe -m pip install -U pip
然而输入以上指令，仍然报错，解决方法：
D:pytest>D:pytestvenvScriptspython.exe -m pip install -U --force-reinstall pip
运行结果
(venv) D:pytest>D:pytestvenvScriptspython.exe -m pip install -U --force-reinstall pip Collecting pip Using cached https://files.pythonhosted.org/packages/5f/25/e52d3f31441505a5f3af41213346e5b6c221c9e086a166f3 703d2ddaf940/pip-18.0-py2.py3-none-any.whl Installing collected packages: pip Found existing installation: pip 18.0 Uninstalling pip-18.0: Successfully uninstalled pip-18.0 Successfully installed pip-18.0
安装包
pip install SomePackage # 最新版本 pip install SomePackage==1.0.4 # 指定版本 pip install 'SomePackage>=1.0.4' # 最小版本
列出已安装的包：pip list
D:pytest>pip list Package Version ---------- ------- pip 18.0 setuptools 39.1.0
查看可升级的包：pip list -o
D:pytest>pip list -o Package Version Latest Type ---------- ------- ------ ----- setuptools 39.1.0 40.0.0 wheel