Numeric Concentric Squares Pattern

# Numeric concentric squares pattern by @CodingComputing

max_num = 4  # given parameter

# Construct the central row
inc_nums = list(range(1, max_num+1))
centre_row = inc_nums[:0:-1] + inc_nums
size = len(centre_row)  # infer the size

for num in centre_row:
    row = centre_row.copy()  # Each row is derived from centre row
    # Replace a middle slice by repeated num
    slice_start = max_num - num
    slice_stop = size - slice_start
    row[slice_start:slice_stop] = [num]*(num*2-1)
    print(' '.join([str(item) for item in row]))  # format and print

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