python dict question: what's behind "{...}"?

Question

trying to play around with dict:

>>> dic = {'a':1}
>>> dic['b'] = dic
>>> print(dic['a'])
1
>>> print(dic)
{'a': 1, 'b': {...}}
>>> print(dic['b'])
{'a': 1, 'b': {...}}

so, what's {...}? is it abbrevated list of {'a': 1, 'b': {{'a': 1, 'b': {{'a': 1, 'b': {...}}...}}...}}?

Answer 1

Interesting question. It means that you created an infinite dictionary nested inside itself, which can't be printed. "dic" contains "dic" which contains "dic"... and so on.

The "{...}" notation is a way to let you know this, and to inform that it can't be represented.

Slightly modified answer taken from
https://stackoverflow.com/questions/17160162/

Answer 2

thanks Diego! and the link worths clicking!