How would I accomplish the following in python:
first = ['John', 'David', 'Sarah']
last = ['Smith', 'Jones']
combined = ['John Smith', 'John Jones', 'David Smith', 'David Jones', 'Sarah Smith', 'Sarah Jones']
Is there a method to combine all permutations?
import itertools
combined = [f + ' ' + l for f, l in itertools.product(first, last)]
Not sure if there is a more elegant solution, but this should work:
[x + " " + y for x in first for y in last]
product from itertools will do the trick.
product(first, last)
will give return a generator with all possible combinations of first and last. After that, all you need to do is concatenate the first and last names. You can do this in one expression:
combined = [" ".join(pair) for pair in product(first, last)]
It's also possible to do this with string concatenation:
combined = [pair[0] + " " + pair[1] for pair in product(first, last)]
This method is slower though, as the concatenation done in the interpreter. It's always recommended to use the "".join() method as this code is executed in C.
I am not aware of any python utility method for this, however following will achieve the same:
def permutations(first, second):
result = []
for i in range(len(first)):
for j in range(len(second)):
result.append(first[i] + ' ' + second[j])
return result
