los.py

#!/usr/bin/python3
from random import shuffle

def filter_list(lst, nums):
	return list( filter( lambda x: x not in nums, lst ) )

excludes = [7,10,13]

sources = filter_list( range( 1, 32 ), excludes)
targets = sources[:]
shuffle(targets)

result = [
	(7, 10),
	(10, 7)
]

result.extend( zip( sources, targets ) )

result = sorted( result, key=lambda x: x[0] )

for i in result:
	print(i)