Nested list comprehension

When dealing with 2D lists, it’s also possible to iterate over objects with a list comprehension.
grid = [
	[10, 20, 30],
	[40, 50, 60],
squared = [[i * i for i in row] for row in grid]
# [[100, 400, 900], [1600, 2500, 3600]]
Here the outer loop goes over the grid row-by-row. Then we iterate over each item in a row.
In case we don’t want to have a 2D list as a result, we can flatten out the grid by omitting the inner brackets and moving the for i in row out of the inner loop. We first iterate over the grid with for row in grid and then for i in row:
grid = [
	[10, 20, 30],
	[40, 50, 60],
squared = [i * i for row in grid for i in row]
# [100, 400, 900, 1600, 2500, 3600]


Can you use list comprehension to print out all the coordinates of a chessboard? The numbers go from 1 to 8, and the letters are A B C D E F G H. The numbering goes like A1 B1 C1 ... H1 the next line is A2 B2 C2 ... H2, etc. Print each line separately.
A1 B1 C1 D1 E1 F1 G1 H1
A2 B2 C2 D2 E2 F2 G2 H2
A3 B3 C3 D3 E3 F3 G3 H3
A4 B4 C4 D4 E4 F4 G4 H4
A5 B5 C5 D5 E5 F5 G5 H5
A6 B6 C6 D6 E6 F6 G6 H6
A7 B7 C7 D7 E7 F7 G7 H7
A8 B8 C8 D8 E8 F8 G8 H8
You can use a single-line condition to determine if you’re printing a newline as the end parameter of a print method


Time limit: 2 seconds

Memory limit: 512 MB

Output limit: 1 MB

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