my_list = [91, 75, 15, 45, 69, 78, 23, 71, 36, 72]

print("The list is : " )
print(my_list)

print("The list after sorting is : " )
my_list.sort()
print(my_list)

index_list = [2, 4, 5, 7]
print("The index values stored in the list are :")
print(index_list)

my_result = []
for index, element in enumerate(my_list):
   if index not in index_list:
      my_result.append(element)

print("The resultant list is : ")
print(my_result)

print("The list after sorting is : " )
my_result.sort()
print(my_result)

The list is :
[91, 75, 15, 45, 69, 78, 23, 71, 36, 72]
The list after sorting is :
[15, 23, 36, 45, 69, 71, 72, 75, 78, 91]
The index values stored in the list are :
[2, 4, 5, 7]
The resultant list is :
[15, 23, 45, 72, 78, 91]
The list after sorting is :
[15, 23, 45, 72, 78, 91]