How can one use standard functions for filter and map?

Question

see code
https://code.sololearn.com/cz4OZA0F91J0/?ref=app

Answer 1

print(list(map(str.lower,"abx")))
print(filter(str.isalpha,list("123abc")))

Answer 2

Shaxzoda Sherzodovna
May you not answer like that in discussion forum.
Let it be to those who knows.
Follow community guidelines of the forum from here-
https://googleweblight.com/i?u=https://www.sololearn.com/Content-Creation-Guidelines/&hl=en-IN

Answer 3

Kevin Star it works!
Great. Thank you! But why as method of str?
Lambdas are pure functions.

oh wait...
there is a difference between len(str) and str. lower().
Is it that?

Answer 4

got it
from functools import reduce
import string
print(reduce(str.__add__,filter(lambda c: c.isalpha() or c == " ",(list(input())[::-1]))))

🕷️🕷️

Answer 5

I dont know