Recommended way to install pip(3) on centos7

问题

I am interrested in knowing the recommended way to install pip3 for python3.6 (as of today, may 2018) on current version of centos7 (7.5.1804) and the accepted answer of How to install pip in CentOS 7? seems to be outdated because:

yum search -v pip

outputs (among other things):

python2-pip.noarch : A tool for installing and managing Python 2 packages
Repo        : epel

python34-pip.noarch : A tool for installing and managing Python3 packages
Repo        : epel

and python34-pip seems to be a (newer?) simpler way than the accepted answer of How to install pip in CentOS 7? :

sudo yum install python34-setuptools

sudo easy_install-3.4 pip

But since the versions of python installed on my machine are 2.7.5 and 3.6.3 why is it python34-pip and not python36-pip ? Is pip the same for 3.4+ (up to current 3.6.3) ?

回答1:

Is pip the same for 3.4+

No, it's not. A single pip installation serves a single Python distribution (pip2.7/pip3.4/pip3.5 etc).
Since Python 3.5, pip is already bundled with the python distribution, so you can just run python3.6 -m pip instead of pip.
Python 3.6 is not available in CentOS 7 vanilla repo. I usually resort to IUS repo when needing to install a fresh Python on CentOS. It always has the most recent Python version, the current one being 3.6.5. It also offers a correspondent pip package.
```
$ yum install https://centos7.iuscommunity.org/ius-release.rpm
$ yum install python36u python36u-devel python36u-pip
```
Unfortunately, IUS doesn't offer a package for Python 3.7 yet so if you are looking for Python 3.7 on CentOS 7, building from source is your only option.

Edit: when `yum` is not an option

You should prefer the bootstrapping solution described in this answer as it is the most reliable way to get a working pip installed.

回答2:

To install pip for python 3.6 on CentOS 7 you need to run

$ python3.6 -m ensurepip

回答3:

Follow these commands in Centos 7

yum install python36
yum install python36-devel
yum install python36-setuptools
easy_install-3.6 pip

to check the pip version:

pip3 -V
pip 18.0 from /usr/local/lib/python3.6/site-packages/pip-18.0-py3.6.egg/pip (python 3.6)

回答4:

There is now a python3-pip package in the CentOS 7 base repository as of 2019-08-22. There is no longer a need for third-party repositories or packages.

Installing python3-pip will also install libtirpc, python3, python3-libs, and python3-setuptools:

yum install --assumeyes python3-pip

You can now verify the version (yes, it is old, but it's what is coming from the base repository):

$ pip3 --version
pip 9.0.3 from /usr/lib/python3.6/site-packages (python 3.6)

If you don't want to stray from the files provided by the python3-pip package, and you don't want to see warnings about pip being old, see https://stackoverflow.com/a/46288945/534275 for silencing the messages.

回答5:

Pip is not bundled in the EPEL version of python 3.6 for some reason. I assume a decent amount of people (such as me) will find this page because of that.

$ sudo yum install -y python36
...
$ python36 -m pip
/usr/bin/python36: No module named pip

So in this case, the setuptools package was the easiest solution.

$ sudo yum install python36-setuptools
$ sudo easy_install-3.6 pip
...
$ python36 -m pip --version
pip 18.0 from /usr/local/lib/python3.6/site-packages/pip-18.0-py3.6.egg/pip (python 3.6)

回答6:

In case you're seeing that pip3 is linked to python2 path:

$ pip3 -V

pip 8.1.2 from /usr/lib/python2.7/site-packages/pip (python 2.7)

You'll probably get:

$ pip3 install --upgrade pip

TypeError: parse() got an unexpected keyword argument 'transport_encoding'

Then try to clear commands cache with hash -r. This has worked for me:

# Install Python 3:
sudo yum install python36 -y

# Install & Upgrade pip3
sudo python36 -m pip install --upgrade pip

# Validate pip3 installation:
sudo python3.6 -m ensurepip
#  Successfully installed pip-10.0.1 setuptools-39.0.1

# Clear commands cache
hash -r
# might be required if getting in bash: /usr/bin/pip3: No such file or directory)

pip3 -V
# pip 19.0.3 from /usr/local/lib/python3.6/site-packages/pip (python 3.6)

which pip3
# /usr/local/bin/pip3

pip2 -V
# pip 8.1.2 from /usr/lib/python2.7/site-packages (python 2.7)

which pip2
# /usr/local/bin/pip2

# Install your Python3 module:
sudo /usr/local/bin/pip3 install {required module for python3}

回答7:

Try This::

sudo yum update
sudo yum install -y python36u python36u-libs python36u-devel python36u-pip

Working for me perfectly.

来源：https://stackoverflow.com/questions/50408941/recommended-way-to-install-pip3-on-centos7

标签

python

python-3.x

pip

python-3.6

centos7