sourya varenya <souryavare...@gmail.com> added the comment:
Here's a sample run for reproducibility:
---
Python 3.6.9(Ubuntu 18.04) & 3.7.4(Windows)
---
>>> a = {1:{5:8},2:{5:8}}
>>> b = dict.fromkeys([1,2],{5:8})
>>> a
{1: {5: 8}, 2: {5: 8}}
>>> b
{1: {5: 8}, 2: {5: 8}}
>>> a[1].update({6:9})
>>> b[1].update({6:9})
>>> a
{1: {5: 8, 6: 9}, 2: {5: 8}}
>>> b
{1: {5: 8, 6: 9}, 2: {5: 8, 6: 9}}
----------
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue38934>
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