Support py3.10 and remove py3.7

[Mdnaimulislam]

Fixes #368.

Description

Added new python version 3.10 and removed python version 3.7.

Status

Ready

Types of changes

• Non-breaking change (fix or new feature that would not break existing functionality).
• Breaking change (fix or new feature that would cause existing functionality to change).
• New tests added to cover the changes.
• In-line docstrings updated.
• Source for documentation at docs manually updated for new API.

[codecov-commenter]

Codecov Report

Merging #370 (8cf9573) into main (28964f0) will increase coverage by 0.00%.
The diff coverage is n/a.

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@@           Coverage Diff           @@
##             main     #370   +/-   ##
=======================================
  Coverage   91.52%   91.52%           
=======================================
  Files          49       49           
  Lines        5226     5228    +2     
=======================================
+ Hits         4783     4785    +2     
  Misses        443      443           

see 2 files with indirect coverage changes

[xianyuanliu]

It seems that Python 3.10 costs much more time in dependency installation than 3.8 and 3.9.

[Mdnaimulislam]

It looks like the sklearn package (not supported by Python 3.10) is being used by one of our dependencies. See this https://github.com/scikit-learn/sklearn-pypi-package, where it says to track down which dependency is using sklearn. I have tried to find it for the last couple of days but haven't been able to track it down. So, for the time being, I have set the environment variable SKLEARN_ALLOW_DEPRECATED_SKLEARN_PACKAGE_INSTALL=True to avoid this error (as provided by the above URL I mentioned).

[xianyuanliu]

Thanks and well done! There are some minor enhancements. This bypassing may be tracked, and removed once it becomes unnecessary.

[xianyuanliu]

It looks like the sklearn package (not supported by Python 3.10) is being used by one of our dependencies. See this https://github.com/scikit-learn/sklearn-pypi-package, where it says to track down which dependency is using sklearn. I have tried to find it for the last couple of days but haven't been able to track it down. So, for the time being, I have set the environment variable SKLEARN_ALLOW_DEPRECATED_SKLEARN_PACKAGE_INSTALL=True to avoid this error (as provided by the above URL I mentioned).

I may find one of the reasons. Installing nilearn-0.6.2 will raise this error, but nilearn>=0.7.0 won't. In the successful test with Python 3.10, only nilearn-0.10.1 is installed, so everything is fine. But in the failed test, 0.6.2 to 0.10.1 are installed . A pip upgrade causes installing all versions of nilearn in some situations, but I have not understood it yet. If you have any knowledge about it, please let me know. Thanks @Mdnaimulislam.

Considering that bypassing may also bypass other issues, I suggest fixing nilearn here to version nilearn>=0.7.0 and testing whether this error is resolved.

This installation error can be reproduced by the following codes.
SKLEARN_ALLOW_DEPRECATED_SKLEARN_PACKAGE_INSTALL=False pip install nilearn==0.6.2
SKLEARN_ALLOW_DEPRECATED_SKLEARN_PACKAGE_INSTALL=False pip install nilearn==0.7.0

[Mdnaimulislam]

I didn't have any idea that the error was being caused by the nilearn version. After my research, my assumption was that it was due to the setuptools version. I encountered a couple of places where the same problem arose because of setuptools. So yes, this problem is related to pip and setuptools. When I was trying to find the cause locally, I came across an error: "SetuptoolsDeprecation: setuptools.installer is deprecated. Requirements should be satisfied by a PEP 517 installer." I am not entirely sure if this is connected to the problem we are having. I have changed the nilearn version; let's see if this solves our problem.

[xianyuanliu]

There are still some Python 3.7 usages in workflow and description. We'd better update them.

[xianyuanliu]

LGTM