Python for loops giving error

[Petrus]

Is the code you provided intended correctly?

It suspect that problem is that you overwriting combination value with every loop iteration and therefore you get only last result.

>>> combinations = list()
>>> for i in range(3):
...     combinations.append([1, 2, 3])
...
>>> combinations
[[1, 2, 3], [1, 2, 3], [1, 2, 3]]
>>> for row in combinations:
...     print(sequence_product(row))
...
6
6
6

I think the problem is when I tried the combinations in new code this does not work.
So what I do now is:
1 step)=> run the code until containing print(combinations), this will give me a result(see solution box above)

2 step )=> Use this code given

 
from functools import reduce
from operator import mul
 
def sequence_productx(combinations):
    """Return sequence elements product; if empty return zero."""
 
    if not combinations:
        return 0
    else:
        return reduce(mul, combinations)

3 step ) =>

sequence_productx(combinations)

sequence_productx(combinations) # this print out 32768

4 step ) = > problem is I don't get answer 96, 128, 192, 13824, 32768.