26th Mar 2019, 4:15 PM
Abdul S Ansari
Abdul S Ansari - avatar
3 odpowiedzi
+ 10
hi Samad, I will try to explain it: def custom_sort(t): return t[1] L = [("Alice", 25), ("Bob", 20), ("Alex", 5)] L.sort(key=custom_sort) print(L) Ouput of this code is: [('Alex', 5), ('Bob', 20), ('Alice', 25)] 1. A list ‘L’ is created with 3 pair of ‘name’ and ‘age’ information. 2. Next the ‘sort’ method is called, giving it one argument ‘key’ which means to which information the sort should work. 3. ‘key=custom_sort’ means that instead of giving the key argument directly to sort, a user function ‘custom_sort’ is called. User function id defined at the top of the code. 4. Function ‘custom_sort’ returns ‘[1]’ which is an index for the sort method. For sorting to ‘name’ the index has to be [0] as name is the first information. So sorting to [1] means its sorted to ‘age’ as the second information. Output with index [0] for ‘name’ is: [('Alex', 5), ('Alice', 25), ('Bob', 20)] Hope this helps.
26th Mar 2019, 4:37 PM
Lothar
Lothar - avatar
+ 3
Samad, I have attached to you a sample file py which I did a few says before to a very similar request like yours. https://code.sololearn.com/c5u83K00g9yO/?ref=app
26th Mar 2019, 6:06 PM
Lothar
Lothar - avatar
+ 1
Lothar Thank you so much for your explanation.
27th Mar 2019, 8:30 AM
Abdul S Ansari
Abdul S Ansari - avatar