I can't understand reverse method. Help please

Question

x.reverse()

x = [1, 2, 6.06, 9]
print(x.reverse(x))

Why it's not right? How it to do?

Answer 1

Reverse is actually changing the array and returning nothing, so you get None. You can call it upfront and print(x).

But I guess what you are looking for is:
print(x[::-1])

It returns all elements in reversed order.
[from:to:iterationOffset]

Answer 2

Ok, let me discribe it.
both x.reverse() and reversed(x) works for strings and lists.

first remember, x.reverse() is a method but reversed(x) is a function. So, reverse does not return while reversed returns!

x = "Hello Roman!"
x.reverse() #It has no argument.
print(x)

output: !namoR olleH

x = "Hello Roman!"
print(reversed(x))

output: !namoR olleH

Hope it helped.
You can also check
docs.python.org/3/
they have it all for you.