CODEWITHSUNDEEP
pythonlistsorting
Yash Shringare
Yash Shringare

Reputation: 1

Can someone please explain this line of code for sorting list using key as parameter?

gIn = list()
egIn = [101, 'Python', 102, 'Machine Learning', 'Deep Learning', 1]
def function1 (lst1):
    lst1.sort(key=lambda e: (isinstance(e, str), e))
    return lst1
print(function1(egIn))

Why are we using (isinstance(e, str), e) in this function? i understood isinstance(e,str) but why is that other e ? what does it do and how the key parameter is used

Upvotes: 0

Views: 77

Answers (1)

ex4
ex4

Reputation: 2428

Here is explanation what does that piece of code do.

List method sort can have key as a parameter. It is a function which returns value and list is sorted according to that value.

(isinstance(e, str), e) is a tuple. For string "abc" it is (True, "abc") and for Integer 5 it is (False, 5).

So it sorts first strings to the end of the list and order strings in end of the list to alphabetical order.

Upvotes: 1

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