How can I view all of the variables that refer to an object?

Question

In my understanding of Python, when I assign

A = 1

the variable A is a reference to an object with value 1 that could also be referred to by other variables.

How can I view/print/return all of the variables that refer to this object?

Answer 1

First, get a dictionary of all variables currently in scope and their values.

d = dict(globals(), **locals())

Then create a list of all references in the dictionary where the value matches the object you are interested in:

[ref for ref in d if d[ref] is obj]

e.g:

A = [1,2,3]
B = A
C = B
d = dict(globals(), **locals())
print [ref for ref in d if d[ref] is C]

output:

['A', 'C', 'B']