'''

Created on 2017年4月8日

@author: weizhen

#to create data for testing

'''

import random

from numpy import maximum

def get_int(msg, minimum, default):

    while True:

        try:

            line = input(msg)

            if not line and default is not None:

                return default

            i = int(line)

            if i < minimum:

                print("must be >=", minimum)

            else:

                return i

        except ValueError as err:

            print(err)

rows = get_int("rows:", 1, None)

columns = get_int("columns", 1, None)

minimum = get_int("minimum (or Enter for 0):", -1000000, 0)

default = 1000

if default < minimum:

    default = 2 * minimum

maximum = get_int("maximum (or Enter for " + str(default) + "):", minimum, default)

row = 0

while row < rows:

    line = ""

    column = 0

    while column < columns:

        i = random.randint(minimum, maximum)

        s = str(i)

        while len(s) < 10:

            s = " " + s

        line += s

        column += 1

    print(line)

    row += 1