So you have a list of tuples, created with the zip built-in function in Python. Like this:
z = [(1, 'a'), (2, 'b'), (3, 'c')]
And you want to reverse zip, to get these two lists:
x = [1, 2, 3] y = ['a', 'b', 'c']
You could invoke map in a wierd way:
x =  y =  map(lambda (a,b): x.append(a) or y.append(b), z) # Returns [None, None, None] # x: [1, 2, 3] # y: ['a', 'b', 'c']
It feels like there should be a solution in itertools. Just haven't found it yet...
2 thoughts on “Python: inverse of zip”