New to python and I´m trying to create a list from the lists created on for loop:
A = [[1,2,3],[4,3,2],[8,5,6]]
for l in range(len(A)):
resultado = []
A2 = A[l][::-1]
resultado.append(A2)
print(resultado)
The current output is:
[[3, 2, 1]]
[[2, 3, 4]]
[[6, 5, 8]]
I´m trying to make this:
[[3, 2, 1],[2, 3, 4],[6, 5, 8]]
Use a list comprehension:
[x[::-1] for x in A]
# [[3, 2, 1], [2, 3, 4], [6, 5, 8]]
You can also reverse the list in place:
for x in A:
x.reverse()
A
# [[3, 2, 1], [2, 3, 4], [6, 5, 8]]
A list comprehension would work as well:
resultado = [l[::-1] for l in A]
Then use this following code
A = [[1,2,3],[4,3,2],[8,5,6]]
B=[]
for l in range(len(A)):
A2 = A[l][::-1]
B.append(A2)
print(B)
Answer : [[3, 2, 1],[2, 3, 4],[6, 5, 8]]
Adjust like below:
A = [[1,2,3],[4,3,2],[8,5,6]]
resultado = []
for l in range(len(A)):
A2 = A[l][::-1]
resultado.append(A2)
print(resultado)
resultado = [] inside your for loop, means for each iteration, you initialize resultado to []
Output:
>>> print(resultado)
[[3, 2, 1], [2, 3, 4], [6, 5, 8]]
Note: You can achieve the same result with a list comprehension and reversed():
>>> [list(reversed(item)) for item in A]
[[3, 2, 1], [2, 3, 4], [6, 5, 8]]
