Question

I am trying to generate a list using list comprehension and I want to do an operation on each generated entity. Something like:

a=['1','2','3']
b=['a','b','c']
temp = [[x,y] for x in a for y in b]
c=[]
for t in temp:
    c.append("".join(t))        

I tried something like:

a=['1','2','3']
b=['a','b','c']
c = ",".join([x,y] for x in a for y in b)

I know this won’t work because the split function has been given a list of lists instead of list of strings. Is there any better way to do this in one go?

The output I am trying to get is ['1a','1b','1c','2a','2b','2c','3a','3b','3c']

Answer 1

>>> [x + y for x in a for y in b]
['1a', '1b', '1c', '2a', '2b', '2c', '3a', '3b', '3c']