sort() and reverse() functions do not work

Question

I was trying to test how the lists in python works according to a tutorial I was reading. When I tried to use list.sort() or list.reverse(), the in

Answer 1

This methods operate in place.

This code works (python 3.x)

a = [66.25, 333, 333, 1, 1234.5]
a.sort()
print(a)
a.reverse()
print(a)

>>> 
[1, 66.25, 333, 333, 1234.5]
[1234.5, 333, 333, 66.25, 1]