Array output for shifting left cell isn't matching the verifier even though my answer seems to-CodePudding

So I've been trying to solve this code. However, running this code, you'd see that the output says I'm getting the wrong answer. What am I doing wrong here? I'm getting the answer they want but the code is still saying I'm wrong.

k=3
source = [10,20,30,40,50,60]
def shift_left(source,k):
    length = len(source)
    for first in range(k):
        for second in range(0,length-1):
            source[second] = source[second 1]
        source[length-1] = 0
    print(source)
    return None

shift_left(source,k)

print("///  Test 01: Shift Left k cell  ///")
source = [10,20,30,40,50,60]
returned_value = shift_left(source,3) # This should return [40, 50, 60, 0, 0, 0]
unittest.output_test(returned_value, [40, 50, 60, 0, 0, 0])

This is the code I tried. Could someone tell me what I'm doing wrong?

CodePudding user response：

The only return statement in the function is return None.

CodePudding user response：

Instead of:

print(source)
return None

Try:

return source

You are only printing out the correct answer, not returning it. You need to return it.