Assigning value to specific cell in 2d list not working as expected

Question

I have the below code, which im expecting to cycle over each cell in the 2d list and assign a random value, however looking at the list once complete it seems to assign the same value value for a whole column... For the life i me i cant see whats wrong.

    rows, cols = (32, 16) 
    ADCResult = [[0]*cols]*rows

    vChannel = 0
    while vChannel < 16:
        hChannel = 0
        while hChannel < 16:
            ADCResult[hChannel][vChannel] = round(random.uniform(0.2,10.0), 2)
            hChannel += 1

        h2Channel = 0
        while h2Channel < 16:
            ADCResult[h2Channel+16][vChannel] = round(random.uniform(0.2,10.0), 2)
            h2Channel += 1

        vChannel += 1


    for row in ADCResult:
        for element in row:
            print(element ,end='\t')
        print('\n')

However this outputs for example

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

7.14 0.42 4.53 2.68 6.55 3.71 7.43 9.05 5.6 3.84 5.62 7.12 0.73 1.38 1.72 3.14

`ADCResult = [[0]*cols]*rows` - root of the problem. – sanyassh Sep 25 '19 at 18:38 — sanyassh, Sep 25 '19 at 18:38

Assigning value to specific cell in 2d list not working as expected

0 Answers0