Answers for "how to move from an index backwards in a list python"

7

reverse index in for loop python

my_list = [1, 2, 3]
my_list.reverse()           # my_list is modified
print(my_list)              # '[3, 2, 1]'
my_revert = my_list[::-1]   # my_list stays [3, 2, 1]
print(my_revert)            # '[1, 2, 3]'
# Item by item reverse with range(<start>, <end>, <step>)
for i in range(len(my_list), 0, -1):		# my_list is [3, 2, 1]
    print(my_list[i-1])		# '1' '2' '3'
for i in reversed(range(len(my_list))):
    print(my_list[i])       # '1' '2' '3'
Posted by: Guest on May-15-2021
0

index and reversing a sub list in python list

def reverse_sublist(lst,start,end):
    lst[start:end] = lst[start:end][::-1]
    return lst
Posted by: Guest on August-16-2020

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