Работа со списками

ls3 = [2, 7, 5, 6, 9, 15]
for i in ls3:
    if i % 2 == 0:
        i / 4
    elif i % 2 != 0:
        i * 2
print(...)

ls3 = [2, 7, 5, 6, 9, 15]
for i in range(len(ls3)):
    if ls3[i] % 2 == 0:
        ls3[i] /= 4
    else:
        ls3[i] *= 2
print(ls3)

ls3 = [2, 7, 5, 6, 9, 15]
new_list = []
for i in range(len(ls3)):
    if ls3[i] % 2 == 0:
        new_list.append(ls3[i] / 4)
    else:
        new_list.append(ls3[i] * 2)
print(new_list)

ls3 = [2, 7, 5, 6, 9, 15]
new_list = []
for i in ls3:
    if i % 2 == 0:
        new_list.append(i / 4)
    else:
        new_list.append(i * 2)
print(new_list)

ls3 = [2, 7, 5, 6, 9, 15]
new_list = [i / 4 if i % 2 == 0 else i * 2 for i in ls3]
print(new_list)

numbers = [2, -5, 8, 9, -25, 25, 4]
result = [int(i) for i in range(max(numbers)) if int(i) ** 2 in numbers]
print(result)

import math
numbers = [2, -5, 8, 9, -25, 25, 4]
result = [int(math.sqrt(i)) for i in numbers if i > 0 and math.sqrt(i).is_integer()]
print(result)

ls3 = [2, 4, 7, 1, 2, 5, 4]
for i in ls3: 
    if ls3.count(i) >= 2:
        del ls3[i]      
print(ls3)

ls3 = [2, 4, 7, 1, 2, 5, 4]
print(set(ls3))

ls3 = [2, 4, 7, 1, 2, 5, 4]
print([i for i in ls3 if ls3.count(i) == 1])

ls3 = [2, 4, 7, 1, 2, 5, 4]
list_unikum = [i for i in ls3 if ls3.count(i) == 1]
for i in reversed(range(len(ls3))):
    if ls3[i] not in list_unikum:
        del ls3[i]
print(ls3)