Repairing Broken Code

[Ingo Dahn]

If your SageCell code broke recently, you may want to go to the SageCellDoctorPage for a suggestion to repair it.

If your problem isn't listed there, try to isolate the problem in a code snippet and submit that code and the resulting error message.

Initially, that site lists 6 problems and 3 solutions.

If you by chance have a solution for one of the open problems, please post it in this thread and I'll copy it over to the SageCellDoctorPage.

If you are available for regularly suggesting solutions (great!) I am happy to provide you with direct write access to the problem/solution spreadsheet.

I hope this is useful, in particular for non-expert users of SageCell.

[Samuel Lelièvre]

Tue 2020-02-18 17:24:07 UTC, Ingo Dahn:

Thanks for this excellent initiative!

The problem at line 5, where

    sage: show(plot(factorial(x), (x, 1, 5)))

raises

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

can be simplified to

    sage: plot(factorial(x), (x, 1, 5))

and even to

    sage: factorial(float(3.2))

That problem now has a proposed solution at

- Sage Trac ticket 26749
  Let `factorial` accept float arguments
  https://trac.sagemath.org/ticket/26749
 
Maybe columns E, F, G could have the following titles,

and be filled as follows for line 5:

- works in

    Sage <= 8.2

- fails in

    Sage 8.3 to 9.0

- Sage Trac ticket

    26749

Are you thinking of suppressing the issues once solved,

or of keeping lines unchanged so they can be referred to?

I'm interested in write access.

Samuel

[Ingo Dahn]

Thanks, I have adapted the sheet and sent a link for write access directly. 

I intend to strike through problems that are no longer problems, i.e. if that code is working again in the current version of SageMath.

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