Python – How to install pip for Python 3.9 on Ubuntu 20.04

pippythonUbuntuubuntu-20.04

Ubuntu 20.04 comes with Python 3.8. I cannot uninstall Python 3.8 but I need Python 3.9

I went ahead and installed Python 3.9 from:

sudo add-apt-repository ppa:deadsnakes/ppa

sudo apt install python3.9

How do I install pip for python 3.9?

Installing pip using
sudo apt-get install python3-pip does not work for me as it installs pip for python 3.8

Installing pip using python3.9 get-pip.py gives an error:

~/python_tools$ python3.9 get-pip.py 
Traceback (most recent call last):
  File "/home/ubuntu/python_tools/get-pip.py", line 23704, in <module>
    main()
  File "/home/ubuntu/python_tools/get-pip.py", line 198, in main
    bootstrap(tmpdir=tmpdir)
  File "/home/ubuntu/python_tools/get-pip.py", line 82, in bootstrap
    from pip._internal.cli.main import main as pip_entry_point
  File "<frozen zipimport>", line 259, in load_module
  File "/tmp/tmpkwyc8h7j/pip.zip/pip/_internal/cli/main.py", line 10, in <module>
  File "<frozen zipimport>", line 259, in load_module
  File "/tmp/tmpkwyc8h7j/pip.zip/pip/_internal/cli/autocompletion.py", line 9, in <module>
  File "<frozen zipimport>", line 259, in load_module
  File "/tmp/tmpkwyc8h7j/pip.zip/pip/_internal/cli/main_parser.py", line 7, in <module>
  File "<frozen zipimport>", line 259, in load_module
  File "/tmp/tmpkwyc8h7j/pip.zip/pip/_internal/cli/cmdoptions.py", line 18, in <module>
ModuleNotFoundError: No module named 'distutils.util'

Best Answer

You can install pip for python 3.9 the following way:

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python3.9 get-pip.py

It is important you use python3.9 instead of just python3, to ensure pip is installed for python 3.9.

If you see any permissions errors, you may need to use

python3.9 get-pip.py --user

If you get an error like No module named 'distutils.util' when you run python3.9 get-pip.py, and you are on a Debian-based Linux distribution, run

sudo apt install python3.9-distutils

and then rerun your get-pip.py command. If you are not on a Debian-based distribution, use the equivalent command for your distribution's package manager.

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The advantage of subprocess.run over os.system is that it is more flexible (you can get the stdout, stderr, the "real" status code, better error handling, etc...).

Even the documentation for os.system recommends using subprocess instead:

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Use:

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>>> print(datetime.datetime.now())
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