Paul S. Paul S. - 2 months ago 10
Python Question

Python dictionary increment

In Python it's annoying to have to check whether a key is in the dictionary first before incrementing it:

if key in my_dict:
my_dict[key] += num
else:
my_dict[key] = num


Is there a shorter substitute for the four lines above?

Answer

An alternative is:

my_dict[key] = my_dict.get(key, 0) + num
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