How to install pip with Python 3?

Question

I want to install pip. It should support Python 3, but it requires setuptools, which is available only for Python 2.

How can I install pip with Python 3?

Answer 1

Below video is how I did in cygwin:

https://asciinema.org/a/hSu4kmJ6wb7b2UiuvxiXqtgGK

There is weirdness in python's pip, pip2, pip3 craziness. In crazy situations like these, it is imperative that there is less talking or explanations, but instead demonstrate things out.

Answer 2

I was able to install pip for python 3 on Ubuntu just by running sudo apt-get install python3-pip.

Answer 3

Single Python in system

To install packages in Python always follow these steps:

1. If the package is for python 2.x: sudo python -m pip install [package]
2. If the package is for python 3.x: sudo python3 -m pip install [package]

Note: This is assuming no alias is set for python

Through this method, there will be no confusion regarding which python version is receiving the package.

Multiple Pythons

Say you have python3 ↔ python3.6 and python3.7 ↔ python3.7

1. To install for python3.6: sudo python3 -m pip install [package]
2. To instal for python3.7: sudo python3.7 -m pip install [package]

This is essentially the same method as shown previously.

Note 1

How to find which python, your python3 command spawns:

ganesh@Ganesh:~$ python3 # Type in terminal
Python 3.6.6 (default, Sep 12 2018, 18:26:19) # Your python3 version
[GCC 8.0.1 20180414 (experimental) [trunk revision 259383]] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>

Notice python 3.6.6 in the second line.

Note 2

Change what python3 or python points to: https://askubuntu.com/questions/320996/how-to-make-python-program-command-execute-python-3

Answer 4

python3 -m ensurepip

I'm not sure when exactly this was introduced, but it's installed pip3 for me when it didn't already exist.

Answer 5

Assuming you are in a highly restricted computer env (such as myself) without root access or ability to install packages...

I had never setup a fresh/standalone/raw/non-root instance of Python+virtualenv before this post. I had do quite a bit of Googling to make this work.

1. Decide if you are using python (python2) or python3 and set your PATH correctly. (I am strictly a python3 user.) All commands below can substitute python3 for python if you are python2 user.
2. wget https://pypi.python.org/packages/source/v/virtualenv/virtualenv-x.y.z.tar.gz
3. tar -xzvf virtualenv-x.y.z.tar.gz
4. python3 virtualenv-x.y.z/virtualenv.py --python $(which python3) /path/to/new/virtualenv
5. source /path/to/new/virtualenv/bin/activate
   • Assumes you are using a Bourne-compatible shell, e.g., bash
   • Brilliantly, this virtualenv package includes a standalone version of pip and setuptools that are auto-magically installed into each new virtualenv. This solves the chicken and egg problem.
   • You may want to create an alias (or update your ~/.bashrc, etc.) for this final command to activate the python virtualenv during each login. It can be a pain to remember all these paths and commands.
6. Check your version of python now: which python3 should give: /path/to/new/virtualenv/bin/python3
7. Check pip is also available in the virtualenv via which pip... should give: /path/to/new/virtualenv/bin/pip

Then... pip, pip, pip!

Final tip to newbie Pythoneers: You don't think you need virtualenv when you start, but you will be happy to have it later. Helps with "what if" installation / upgrade scenarios for open source / shared packages.

Ref: https://virtualenv.pypa.io/en/latest/installation.html

Answer 6

If your Linux distro came with Python already installed, you should be able to install PIP using your system’s package manager. This is preferable since system-installed versions of Python do not play nicely with the get-pip.py script used on Windows and Mac.

Advanced Package Tool (Python 2.x)

sudo apt-get install python-pip

Advanced Package Tool (Python 3.x)

sudo apt-get install python3-pip

pacman Package Manager (Python 2.x)

sudo pacman -S python2-pip

pacman Package Manager (Python 3.x)

sudo pacman -S python-pip

Yum Package Manager (Python 2.x)

sudo yum upgrade python-setuptools
sudo yum install python-pip python-wheel

Yum Package Manager (Python 3.x)

sudo yum install python3 python3-wheel

Dandified Yum (Python 2.x)

sudo dnf upgrade python-setuptools
sudo dnf install python-pip python-wheel

Dandified Yum (Python 3.x)

sudo dnf install python3 python3-wheel

Zypper Package Manager (Python 2.x)

sudo zypper install python-pip python-setuptools python-wheel

Zypper Package Manager (Python 3.x)

sudo zypper install python3-pip python3-setuptools python3-wheel