# How to get the list of user defined variables

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

How to get the list of user defined variables

add a comment

2

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.

0

There is another way, taken from a different post:

sage: show_identifiers()

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

Seen: **743 times**

Last updated: **Jan 28 '16**

Sage showed "TypeError: need a summation variable" when i used sum function with for loop

Converting expression to list of terms and back

What's a common way to save and load a list?

Is there a command to find the place of an element in an array?

frequency (count) in Numpy Array

Please Append 'solve' Help Documentation

Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.