Python Puzzle

Can anyone exlain what is going on in this Python3 session in the first division?

Python 3.8.0a3 (default, Jan 22 2020, 11:52:15)
[GCC 4.7.4] on riscos
Type “help”, “copyright”, “credits” or “license” for more information.

>>> 5*6
30
>>> 100/2.54
826.771653543307
>>> 4/2
2.0
>>> 100/2
50.0
>>> 100/2.5
40.0
>>> 100/2.54
39.37007874015748
>>> 7/4
1.75
>>>

And here is another. I am puzzzled by the result of 100%2.54.
>>> 100/2.54
39.37007874015748
>>> 7/4
1.75
>>>100//2.54
39.0
>>> 100%2.54
0.9399999999999986
>>>100/2.54
39.37007874015748
>>>

Prompted by your query I sourced the Python port – and it
didn’t happen here. However, I note that I have a later version here:
Python 3.8.0a4 (default, Feb 10 2020, 14:56:24) [GCC 4.7.4] on riscos

Perhaps that may be relevant?

Thanks John – I restarted Python and cannot now reproduce the odd result:
>>> 100/2.54
>>> 826.771653543307

The second puzzle
>>> 100%2.54
0.9399999999999986

shows the correct result. I had misunderstood how the remainder function works.

I note that I have a later version here:
Python 3.8.0a4 (default, Feb 10 2020, 14:56:24) [GCC 4.7.4] on riscos

I will update today.

I note that I have a later version here:
Python 3.8.0a4 (default, Feb 10 2020, 14:56:24) [GCC 4.7.4] on riscos

Where can it be found? The latest I can find is in the zip Python38a3

Where can it be found?

It’s probably worth checking out the following thread – Python 3.8 – alpha release

I followed the thread quoted immediately above to find the latest incarnation.

It’s probably worth checking out the following thread – Python 3.8 – alpha release

Or to save directing people to go to another thread and then scan all the way through to find this link (in full) https://github.com/c-jo/cpython/releases/tag/riscos-3.8.0-a4

From which a little logic gives you https://github.com/c-jo/cpython/releases

Which will always have the link to the specific part of that github repository with the actual release as well as the link to the source for those who like to play.

Which will always have the link …

A constant help in troubled times!

On my part it was a suggestion to look where the information will be, but, slightly obliquely, also to hint to the author that it would be less effort to point at the generic page rather than a specific version link

Thanks. I have added Python to my collection of RISC OS links.