What's going on here? Repeating rows in random list of lists.
- by Jesse Aldridge
I expected to get a grid of unique random numbers. Instead each row is the same sequence of numbers. What's going on here?
from pprint import pprint
from random import random
nrows, ncols = 5, 5
grid = [[0] * ncols] * nrows
for r in range(nrows):
for c in range(ncols):
grid[r][c] = int(random() * 100)
pprint(grid)
Example output:
…
