Attribute error when using [0..n] in a function

[Galen Dorpalen-Barry]

Hello Sage-Devel,

For each n, I want to create a list of numbers [0,..., binomial(n,2)-1]. When I use the "[0...3]" or "[0..5]" (or similar) in the terminal, everything is fine. When I put any of those into a function, I get an attribute error. For example, I can make the function

def error_maker(n):

    return [0..n]

When I run error_maker(3), I get:

AttributeError: 'float' object has no attribute 'n'

Does anyone know how I can avoid this problem?

Thanks in advance!

Galen

[Justin C. Walker]

A few details would help:
- what version of sage?
- what OS/version?
- build from source/download from sagemath.org/use package manager for some system?

FWIW, I tried your example on sage 9.3.rc4, with no complaints (macOS 10.15.7).

Justin

> On Apr 27, 2021, at 19:48, 'Galen Dorpalen-Barry' via sage-devel <sage-...@googlegroups.com> wrote:
>
> def error_maker(n):
>
> return [0..n]
>
>

[David Roe]

Are you writing this function in a .sage file or a .py file?  The latter won't work, since it doesn't preparse the input.

David

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[Galen Dorpalen-Barry]

Thank you so much!

I was using Sage 8.3.beta3. After reading your helpful comments, I went to update my Sage installation to version 9.2. That didn't solve the problem, but changing the file type from .py to .sage did!

Best,

Galen

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--

Galen Dorpalen-Barry (she/her/hers)

PhD Candidate

School of Mathematics
University of Minnesota