How do I reverse a part (slice) of a list in Python?

Question

Why doesn't this work?

# to reverse a part of the string in place  a = [1,2,3,4,5] a[2:4] = reversed(a[2:4])  # This works! a[2:4] = [0,0]             # This works too. a[2:4].reverse()           # But this doesn't work 

Answer 1

Just use the slice and reverse it.

a[2:4] = a[2:4][::-1]