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How to get the list of user defined variables

asked 2013-02-01 11:32:41 -0600

Edinah gravatar image

updated 2013-02-01 14:24:06 -0600

kcrisman gravatar image

How do I get the list of user defined variables in a sage session I just loaded using the load_session command ?

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answered 2013-02-04 19:03:39 -0600

benjaminfjones gravatar image

updated 2013-02-04 19:04:17 -0600

That's a good question. You can inspect the global variables that have been defined at any given point in a session, but most of those will be defined when various modules load on Sage startup. You can look just at those globals whose type is sage.symbolic.expression.Expression, there aren't too many at startup:

sage: G = globals()
sage: for k in G:
....:     if type(G[k]) == sage.symbolic.expression.Expression:
....:         print k
golden_ratio
log2
NaN
merten
I
twinprime
pi
catalan
brun
euler_gamma
x
khinchin
i
glaisher
mertens

Anything not on that list is a global symbolic expression that is defined in your loaded session. Variables will be among these.

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Thank you very much!

Edinah gravatar imageEdinah ( 2013-02-05 05:20:48 -0600 )edit
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answered 2016-01-28 07:29:29 -0600

stan gravatar image

There is another way, taken from a different post:

sage: show_identifiers()

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Asked: 2013-02-01 11:32:41 -0600

Seen: 544 times

Last updated: Jan 28 '16