Confused about logical operators (i.e. "comparison operators", or "boolean operators") in Python (lemmy.blahaj.zone)

submitted 3 weeks ago* (last edited 2 weeks ago) by EveryMuffinIsNowEncrypted to c/python@programming.dev

34 comments fedilink hide all child comments

Note: The attached image is a screenshot of page 31 of Dr. Charles Severance's book, Python for Everybody: Exploring Data Using Python 3 (2024-01-01 Revision).

I thought = was a mathematical operator, not a logical operator; why does Python use

>= instead of >==, or <= instead of <==, or != instead of !==?

Thanks in advance for any clarification. I would have posted this in the help forums of FreeCodeCamp, but I wasn't sure if this question was too.......unspecified(?) for that domain.

Cheers!

Edit: I think I get it now! Thanks so much to everyone for helping, and @FizzyOrange@programming.dev and @itslilith@lemmy.blahaj.zone in particular! ^_^

you are viewing a single comment's thread
view the rest of the comments

[-] sesenion@mastodon.social 1 points 3 weeks ago

@EveryMuffinIsNowEncrypted
Careful about "is" and "is not"
These compare identity of objects, which in CPython usually checks if objects are at the same memory address.

This works for some objects like True, False, None and small integer numbers, since they are created as unique objects when the interpreter starts.

Usually you would use == or != for these types of comparison. See below an example where "is" fails comparing two identical float numbers.