Bug report

Python removes negative ranges from dictionaries

Example to reproduce:

print({range(16, 1): 0.5, range(32, 16): 0.5})

The expected output:

{range(16, 1): 0.5, range(32, 16): 0.5}

The actual output:

{range(16, 1): 0.5}

Your environment

• CPython versions tested on: 3.10, 3.7.6
• Operating system and architecture: WIN11+linux