pattern.py

#!/usr/bin/env python

from random import shuffle


def generate(x_size, y_size):
    '''generates pattern in the form:
    [0,1,2]
    [1,2,0]
    [2,0,1]
    '''
    l = []
    for i in range(x_size):
        temp = []
        for j in range(y_size):
            temp.append((i + j) % x_size)
        l.append(temp)
    return l


def generate_from_list(l, y_size, n=1):
    ''' Generates a pattern from a given list, 
    the optional parameter n defines how much 
    the list gets rotated per line'''
    ret = []
    ret.append(l)
    for i in range(y_size):
        ret.append(rotate(l, (n * (i + 1)) % len(l)))
    return ret


def rotate(l, n):
    return l[n:] + l[:n]


def print_out(l, frmt='{} '):
    ''' Prints out a pattern, the opional frmt argument 
    is used to format the elements of the pattern'''
    for elem in l:
        elem_str = ''
        for ch in elem:
            elem_str += frmt.format(ch)
        print(elem_str)

pattern = generate(20, 20)
print_out(pattern, frmt='{:02} ')

shuffle(pattern)
print_out(pattern)

for i in range(len(pattern)):
    shuffle(pattern[i])
print_out(pattern)

pat = [' ', 'X', ' ', 'X', ' ', 'X', ' ', 'X']
pattern = generate_from_list(pat, 8, n=2)
print_out(pattern)