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d = {k:v for k, v in ('a1', 'b2')} d['a1'] = 1 d['b2'] = 2 print(d) print(len(d))

Can some one explain this code

28th Aug 2021, 2:34 PM
Akash Yadav
Akash Yadav - avatar
2 odpowiedzi
+ 7
Akash Yadav , the first line is a dict comprehension that uses a tuple of strings as an iterable. these strings will be unpacked to the variables k = key and v = value, and thenn added to the dict. after this statement the result is: {'a': '1', 'b': '2'} in the next 2 steps 2 new key / value pairs will created in the dict then dict will be printed and also the length of the dict
28th Aug 2021, 2:54 PM
Lothar
Lothar - avatar
+ 5
d = {k:v for k, v in ('a1', 'b2')} # d == {'a': '1', 'b': '2'} # ("a1" is a string [or an array of chars] w/ 2 values: a & 1) d['a1'] = 1 # d == {'a': '1', 'b': '2', "a1": 1} d['b2'] = 2 # d == {'a': '1', 'b': '2', "a1": 1, "b2": 2} print(d) print(len(d)) # d has 4 keys so output: 4
28th Aug 2021, 2:47 PM
Slick
Slick - avatar