Reversing a Sequence in Python
To reverse all elements of a sequence, specify a step with a negative value:
txt = '123456789'
res = txt[::-1]
print(res) # '987654321'
Given a string:
txt = '12345'
Turn it over:
'54321'
Given a list:
lst = ['c', 'b', 'a']
Turn it over:
['a', 'b', 'c']
Given a string:
txt = '123456789'
Get a slice of all its symbols at even positions in reverse order:
'8642'
