setdefault python

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showing results for - "setdefault python"
Giovanni
18 Jan 2018
1newDict = {1:"One",
2           2:"Two",
3           3:"Three"}
4x=newDict.setdefault(4,"Four")
5print(newDict[4])
6#returns Four
7
8newDict2 = {1:"One",
9           2:"Two",
10           3:"Three",
11           "Hello":"World"}
12y=newDict.setdefault("Hello","Yellow")
13print(newDict2["Hello"])
14#returns World
15
16dict1 = {1:"One",2:"Two"}
17x=dict1.setdefault(3,"Three")
18x=dict1.setdefault(2,"Duo")
19print(dict1)
20#prints {1: 'One', 2: 'Two', 3: 'Three'}
21
22#Therefore if value doesn't exist it is given default value, else value of key is returned.
23
Brett
15 Jul 2020
1manga_names = {}
2with open('manga_list.txt', 'r') as file:
3    manga = file.readline()
4    file.readline()
5    manga_names.setdefault(manga, 0)
6    manga_names[manga] += 1
7
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