syntax warning of literal

[wyli]

Describe the bug
command:

./runtests.sh --clean; python -W error -c "import monai"

outcome:

  File "/Users/Documents/MONAI/monai/transforms/spatial/array.py", line 176
    if spatial_size is not -1 and spatial_size is not None:
       ^
SyntaxError: "is not" with a literal. Did you mean "!="?

[wyli]

patch included in #3773

[Nic-Ma]

Hi @wyli ,

Thanks for your issue report, I also saw this warning yesterday, it's a warning from python 3.8+.
There is also another warning: "is" with a literal. Did you mean "=="?
Could you please help also identify and update it in your PR?

Here is the raw warnings I saw yesterday when testing the save_state PR:

root@apt-sh-ai:/workspace/data/medical/MONAI# python tests/test_save_state.py
"is not" with a literal. Did you mean "!="?
"is" with a literal. Did you mean "=="?
..........
----------------------------------------------------------------------
Ran 10 tests in 0.010s

OK

Thanks.