I installed Python3.11 which is located usr/local/bin/python3, which came without pip. The old Python3.10 was located in usr/bin/python3. I tried to install pip with sudo apt-install python3-pip, but it seems to be attached to the old Python3.10. If I check pip --version, the output will be this: pip 22.0.2 from /usr/lib/python3/dist-packages/pip (python 3.10), but I need it for Python3.11. For example if I try to pip install requests now, I get Requirements already satisfied: requests in /usr/lib/python3/dist-packages (2.25.1), which is the Python3.10 folder.

CodePudding user response：

Maybe you need pyenv:

What pyenv does...

Lets you change the global Python version on a per-user basis.

Provides support for per-project Python versions.

Allows you to override the Python version with an environment variable.

Searches for commands from multiple versions of Python at a time. This may be helpful to test across Python versions with tox.

I'm using it to manage my virtual environments and my global environments

❯ pyenv global 3.10.5

❯ pyenv versions
  system
  3.7.10
* 3.10.5 (set by /home/xunjie/.pyenv/version)
  3.10.8

❯ which python
/home/xunjie/.pyenv/shims/python

❯ which pip   
/home/xunjie/.pyenv/shims/pip

CodePudding user response：

Your new python version(/usr/local/bin/python3) has pip. But your symbolic links has got twisted, you couldn't use it easily. Try this below.

/usr/local/bin/python3 -m pip install pip

Also before you change your symbolic links, you have to use pip like this below.

/usr/local/bin/python3 -m pip install <package>

If you want to use new python version as `python` OR `python3` command,

 whereis python3.11

the result will be like this. the second column is the binary (But in your case /usr/local/bin/python3).

> python3.11: /usr/local/bin/python3.11 /usr/local/share/man/man1/python3.11.1

Before changing all symbolic links to link new python3.11,

Let's find a newer pip binary

which pip3.11

the result of mine is

> /usr/local/bin/pip3.11

Let's find the old python and pip symbolic link path.

which python
which python3
which pip
which pip3

let's say the result is

which python
> /usr/bin/python
which python3
> /usr/bin/python3
which pip
> ~/.local/bin/pip
which pip3
> ~/.local/bin/pip3

Let's connect symbolic links to newer python.

ln -sf /usr/local/bin/python3.11 /usr/bin/python
ln -sf /usr/local/bin/python3.11 /usr/bin/python3
ln -sf /usr/local/bin/pip3.11 ~/.local/bin/pip
ln -sf /usr/local/bin/pip3.11 ~/.local/bin/pip3

ln -s creates a symbolic link. -f option of ln overwrites an existing symbolic link.

If you want to use new python version as python OR python3 command,

If you want to use new python version as `python` OR `python3` command,