Python: aliased to python3

Question

I tried to upgrade python 2.7 to python 3 and I modified the file ~/.bash_aliases but when I type python in elementary terminal I get this error

zsh: command not found: python3

and when I type which python

python: aliased to python3

actually I prefer return to python 2.7 or if someone know how can I fix this :c

You are using `zsh`. Does `zsh` read `.bash_aliases` or `.bashrc`? — Kevin, Dec 19 '14 at 15:48
If neither of those files, run a `grep python3 ~/.*` through all dot-files files in your home directory; possibly the alias turns up. — , Dec 19 '14 at 15:55
Please post the contents of your `~/.zshrc` file, if it exists. — Kevin, Dec 19 '14 at 16:20
Can you run the `python3` command successfully without the alias? — AlG, Dec 19 '14 at 16:24
i delete the file bash_aliases and i could run python. But im very intersted to update python 3.4 :c — ikenshu, Dec 19 '14 at 17:30

score 21 · Accepted Answer · answered Feb 16 '15 at 06:17

21

Go into your .zshrc file. Is there a line that reads:

alias python='python3'

If so, remove that line. Else, check if you can run python2, python2.7, or something like that. If so, then just hack and add the line

alias python='python2'

Or whatever your python2 is. Else, type

sudo apt-get install python2.7

Or whatever is the appropriate method for installing programs on your system.

answered Feb 16 '15 at 06:17

Accidental brine

On mac, when I do this, I can't run that came installed with Python3. See my answer below – Eyong Kevin Enowanyo Oct 05 '21 at 09:12
1

After you make changes to `~/.zshrc` and save the file, don't forget to run `source ~/.zshrc` to apply the changes. – mchid Feb 04 '22 at 23:13

score 1 · Answer 2 · answered Oct 05 '21 at 09:19

Follow this steps if you are using macOS.

Install Python with brew: brew install python. This will install the latest version of Python. If you want Python 2.7, do well to specify the version.
Check the path where this Python was installed: brew info python. You will see a path similar to: /usr/local/opt/python@3.9/libexec/bin
Make home brew Python default:

$ echo 'export PATH="/usr/local/opt/python@3.9/libexec/bin:$PATH"' >> ~/.zshrc

Source the file to apply changes without restarting the terminal: source ~/.zshrc

2 Answers2