Google Colab Python 版本不变

Question

I want to change the python version on my Google Colab. Currently, it's running python 3.7:

[In]: ! python --version
[Out]: Python 3.7.13

I want python 3.10, so I followed the instructions in this post :

! sudo apt-get update -y
! sudo apt-get install python3.10
! sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.10 1
! sudo update-alternatives --config python3

Here, a list is printed, and I choose python 3.10. Then

! sudo apt install python3-pip

Now, when I query the python version, it shows 3.10:

[In]: ! python --version
[Out]: Python 3.10.6

So far so good! BUT , now there are two problems:

1. pip seems to be completely broken ; I can't pip install anything, eg both !pip install gym and !pip3 install gym give the following error:

AttributeError: module 'collections' has no attribute 'MutableMapping'

2. Python version shows 3.10, but seems to be still 3.7, as newer syntax throws syntax error , eg:

[In]: (a := 3)
[Out]: SyntaxError: invalid syntax

[In]: a: list[int] = [1]
[Out]: TypeError: 'type' object is not subscriptable

Answer 1

you must downgrade python.

Deprecated since version 3.3, will be removed in version 3.10: Moved Collections Abstract Base Classes to the collections.abc module. For backwards compatibility, they continue to be visible in this module through Python 3.9.

Ref. https://docs.python.org/3.9/library/collections.html