Cobol in Python. Problem 1, p. 3, Principles of Program Design, 1975. M.A. Jackson.

mtable-v1.py

#!/usr/bin/env python
# coding: utf-8

"""
Problem 1. Multiplication table, Principles of program design (1975).

1 

2 4 

3 6 9 

4 8 12 16 

5 10 15 20 25 

6 12 18 24 30 36 

7 14 21 28 35 42 49 

8 16 24 32 40 48 56 64 

9 18 27 36 45 54 63 72 81 

10 20 30 40 50 60 70 80 90 100 

"""

from __future__ import print_function
import sys

lineno = 0
colno = 0
num = 0

def display_line():
    global num
    sys.stdout.write('%s ' % num)

def pstart():
    global lineno, num
    lineno = 1
    num = 1
    display_line()
    print('\n')
    while True:
        if lineno == 10:
            break
        pline()
        print('\n')

def pline():
    global lineno, colno
    lineno = lineno + 1
    colno = 0
    while True:
        if lineno == colno:
            break
        pnum()
        display_line()

def pnum():
    global lineno, colno, num
    colno = colno + 1
    num = lineno * colno

if __name__ == '__main__':
    pstart()

mtable-v2.py

#!/usr/bin/env python
# coding: utf-8

"""
Problem 1. Multiplication table, Principles of program design (1975).

Second version.

1 

2 4 

3 6 9 

4 8 12 16 

5 10 15 20 25 

6 12 18 24 30 36 

7 14 21 28 35 42 49 

8 16 24 32 40 48 56 64 

9 18 27 36 45 54 63 72 81 

10 20 30 40 50 60 70 80 90 100 


"""

from __future__ import print_function
import sys

lineno = 0
colno = 0
num = 0

def display_line():
    global num
    sys.stdout.write('%s ' % num)

def ptable():
    global lineno
    for lineno in range(1, 10 + 1, 1):
        pline()

def pline():
    global lineno, colno
    for colno in range(1, lineno + 1, 1):
        pnum()
        display_line()
    print('\n')

def pnum():
    global lineno, colno, num
    num = lineno * colno

if __name__ == '__main__':
    ptable()