如何在 Linux Ubuntu 16.04 中使用 Pip3 为 Python 3.6 安装模块？

Question

I am running Linux Ubuntu 16.04, and my default version of python3 is Python 3.5.2.

I downloaded Python 3.6 to have a more recent version of Python. I can get it running on my command line using 'python3.6', while my default version of python3 remains Python 3.5.2.

I want to install the packages I had on Python 3.5.2 in Python 3.6. I tried to use the following command:

pip3 install numpy

But I get the following message:

Defaulting to user installation because normal site-packages is not writeable
Requirement already satisfied: numpy in ./.local/lib/python3.5/site-packages (1.18.5)

How do I get pip3 to install packages to Python 3.6 specifically?

This is my current version of pip3:

pip3 --version
pip 20.2.4 from /home/[username]/.local/lib/python3.5/site-packages/pip (python 3.5)

Answer 1

您必须使用精确版本，例如pip-3.5.2或pip-3.6

Answer 2

You can try pip3.6 or python3.6 -m pip .

If both don't work, pip is not installed for the new Python version. Follow the instructions at https://pip.pypa.io/en/stable/installing/ but make sure to use python3.6 instead of just python !

On some installations it might be necessary to use sudo before python / python3.6 .