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Can't find module lie_algebras

asked 2018-09-14 18:05:34 +0200

Mingsy gravatar image

updated 2018-09-19 14:02:49 +0200

slelievre gravatar image


I am new to Sage and have been trying the Sage Notebook. I have been trying to run some of the example code from the lie_algebra class. But trying

"import sage.algebras.lie_algebras"

gives me

"ImportError: No module named lie_algebras".

I am trying to use the LieAlgebra module.


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It is unexpected. How did you install Sage ? Could you please give us some informations so that someone can try to reproduce your problem:

  • which version of Sage did you use ?
  • which OS ?
  • did you install Sage from the binaries, and which ones ?
  • did you compile Sage yourself ?
  • which notebook did you use (Sage notebook or jupyter notebook) ?
  • did you use the command line ?
  • which commands did you type precisely to get the error ?
  • which error message did you get ?
  • ... ?
tmonteil gravatar imagetmonteil ( 2018-09-15 10:32:27 +0200 )edit

In the title of the question the b and e in algebra are switched; you didn't do the same mistake when coding by any chance?

slelievre gravatar imageslelievre ( 2018-09-17 00:51:14 +0200 )edit

Thanks. No, it doesn't seem that way. I just typed the title of the question in a hurry. I am running Sage Notebook on a local host and it is supposed to be version 7.5.1. Might I need a rebuild?

Mingsy gravatar imageMingsy ( 2018-09-18 14:13:25 +0200 )edit

I am running Ubuntu 18.04 and here is a screenshot (link_text). I installed Sage from the Ubuntu Gnome software center which says that it is a pre-built binary for Ubuntu 14.04 (Sage ver. 7.5.1~aimsppa6).

I guess I just wanted to know if this was a known previous issue.

Mingsy gravatar imageMingsy ( 2018-09-18 14:20:25 +0200 )edit

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answered 2018-09-19 14:02:15 +0200

slelievre gravatar image

Lie algebras have only been introduced in Sage in recent versions.

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yes, you are right. I just tried in on the ver. 8.3 and its works.


Mingsy gravatar imageMingsy ( 2018-09-20 12:54:18 +0200 )edit

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Asked: 2018-09-14 18:05:02 +0200

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Last updated: Sep 19 '18