How do I reverse a sublist in a list in place?

Question

I\'m supposed to create a function, which input is a list and two numbers, the function reverses the sublist which its place is indicated by the two numbers. for example this is

Answer 1

Not sure if you have a similar problem as mine, but i needed to reverse a list in place.

The only piece I was missing was [:]

exStr = "String"

def change(var):
  var[:] = var[::-1] # This line here

print(exStr) #"String"
change(exStr)
print(exStr) #"gnirtS"