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Python

Joel Sprunger
Joel Sprunger
5,448 Points
Posted by Joel Sprunger
Joel Sprunger
5,448 Points

python comprehensions: range() or list(range())?

I was trying to follow along in python 3.8 and range() wasn't working. I searched the web and found after 3.4 you need to use list(range()) to get the list rather than an object returned. I think this could be updated, even with just a note.

4 Answers

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

It seems to work as expected for me:

>>> import sys
>>> sys.version
'3.8.0 (default, Nov 14 2019, 22:29:45)'
>>> [num * 2 for num in range(1, 6)]
[2, 4, 6, 8, 10]

Joel Sprunger
Joel Sprunger
5,448 Points
Joel Sprunger
Joel Sprunger
5,448 Points

I'm sorry I thought this was connected to the python comprehensions workshop. Basically the syntax is shown as follows...

[num * 2 for num in range(1, 6)]

This wasn't working in python 3.8.

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

It depends on what you are doing with it. By itself, "range" is not a list but it is usable as an iterable

For future questions, please show the actual code and provide a link to the course page you are working with.

Joel Sprunger
Joel Sprunger
5,448 Points
Joel Sprunger
Joel Sprunger
5,448 Points

Okay it is working now. I'm really not sure what was different about my setup that was giving errors using range() but working using [range()]. Thanks for the help.