Fix for issues related to mypy

[sayantan1410]

Fixes #2361

Check list:

• Bug Fix

Let me know if there is any mistake @vfdev-5

[vfdev-5]

Thanks for the PR @sayantan1410
I left a question

[sayantan1410]

@vfdev-5 I have tried to look at each of the error codes in the lines where the errors where generating, Let me know if I have made some mistake.

[vfdev-5]

LGTM, thanks for the update @sayantan1410 !
Let's see if mypy is passing and we can merge it.

[vfdev-5]

@sayantan1410 can you fix flake8 error:

+ flake8 ignite tests examples --config setup.cfg
ignite/handlers/checkpoint.py:721:36: W291 trailing whitespace

• https://github.com/pytorch/ignite/runs/4882332288?check_suite_focus=true#step:11:57

[sayantan1410]

@vfdev-5 Sorry, probably there were two white spaces and I removed one and that's why it failed again, actually the extra white space did not show in my code editor.

[vfdev-5]

@sayantan1410 if you are using VSCode, you can trim extra white spaces with this option:

• https://stackoverflow.com/questions/30884131/remove-trailing-spaces-automatically-or-with-a-shortcut

[sayantan1410]

@vfdev-5 Thank you so much for merging the PR.
Just a question, I saw this https://github.com/pytorch/ignite/runs/4883179036 test failing, can you tell me why it failed and why it was merged instead of a test failing ? Just curious to know.

[vfdev-5]

@sayantan1410 failing test is codecov patch, this one is not always reliable indicator and we ignore it sometimes

[sayantan1410]

@vfdev-5 Okay, thank you, also yes I was using VS Code and I changed the settings for trimming white spaces to true.