Do I need to install pip?

pip is already installed if you are using Python 2 >=2.7.9 or Python 3 >=3.4 downloaded from python.org or if you are working in a Virtual Environment created by virtualenv or pyvenv. Just make sure to upgrade pip.

Installing with get-pip.py

To install pip, securely download get-pip.py. [1]:

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py

Inspect get-pip.py for any malevolence. Then run the following:

　到这一步的时候，如果python2的pip坏了，就运行：python2 get-pip.py

　如果是python3的pip坏了，升级就运行：python3 get-pip.py

python get-pip.py

get-pip.py also installs setuptools [2] and wheel if they are not already. setuptools is required to install source distributions. Both are required in order to build a Wheel Cache (which improves installation speed), although neither are required to install pre-built wheels.

python get-pip.py --no-index --find-links=/local/copies

python get-pip.py --user

python get-pip.py --proxy="http://[user:passwd@]proxy.server:port"

Using Linux Package Managers

See Installing pip/setuptools/wheel with Linux Package Managers in the Python Packaging User Guide.

Upgrading pip

On Linux or macOS:

pip install -U pip

On Windows [4]:

python -m pip install -U pip

Python and OS Compatibility

pip works with CPython versions 2.7, 3.3, 3.4, 3.5, 3.6 and also pypy.

This means pip works on the latest patch version of each of these minor versions. Previous patch versions are supported on a best effort approach.

pip works on Unix/Linux, macOS, and Windows.