Intersection python dict

Python 3.6.9 (default, Oct  8 2020, 12:12:24) 
[GCC 8.4.0] on linux
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>>> a = {'a': 123, 'c': 5}
>>> b = {'a': 2, 'b': 4}
>>> a.keys() & b.keys()  # intersection
{'a'}
>>> a.keys() ^ b.keys()  # difference
{'b', 'c'}
>>> a.keys() - b.keys()  # subtraction
{'c'}

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