Ask HN: Website listing/explaining common Python pitfalls&tricks?

Is there any site which has a good list of things that programmers that come from other languages have to pay attention to, respectively, that lists some (useful) tricks that are commonly used?

Examples:

1) I think that I remember (I might be wrong) that once I was passing a "list" to a function and that when I manipulated the "list" in the function itself (by removing/adding items) the "list"-variable outside of the function got the same changes (I didn't expect that as I thought that the list-variable would be copied when passing it to the function).

2) When using the "multiprocessing"-module I thought that I managed to create a shared "list"-variable that could be read by all sub-processes, by declaring it outside of the function which was linked to the sub-processes. I'm sure that technically it did work, but I'm not sure if it was just by luck or what (anyway I think that Python v3.8 now officially supports shared memory/variables?).

3) I kept creating strings like 'The value of the variable is " + str(myvar) + "blablah"' and I read all the time that that was a performance problem but recently I read as well that that's not the case anymore => conflict :(

4) I recently read in an article referenced in HN that doing "my_str = str" in a function and that then using "my_str()" instead of "str()" is faster (somehow because "my_str()" is then "local", but didn't understand the exact implications) => is this something normal to do?

Thanks :)