List Diff - A Doff Tool for Lists. Perform a diff between a pair of lists.

listdiff.py

"""List Diff - A Doff Tool for Lists

Perform a diff between a pair of lists.

Usage:
	listdiff.py <file1> <file2>
	listdiff.py -h | --help
	listdiff.py --version

Arguments:
	<file1>			the file containing the first list
	<file2>			the file containing the second list

Options:
	-h --help		Show this screen
	--version		Show version

"""


from docopt import docopt

def print_list(mylist):
	'''Print a list, one element per line and indented by a tab'''
	for i in mylist:
		print '\t{}'.format(i)

if __name__ == '__main__':
	args = docopt(__doc__, version='List Diff v1.0')

	list1 = [ ]
	with open(args['<file1>'], 'r') as f1:	
		list1 = [line.strip() for line in f1]
	
	list2 = [ ]
	with open(args['<file2>'], 'r') as f2:	
		list2 = [line.strip() for line in f2]

	inL1notL2 = list(set(list1) - set(list2))
	inL2notL1 = list(set(list2) - set(list1))

	print 'In {}, but not in {}'.format(args['<file1>'], args['<file2>'])
	print_list(inL1notL2)
	print ''
	print 'In {}, but not in {}'.format(args['<file2>'], args['<file1>'])
	print_list(inL2notL1)