I want to turn a take two lists and create one long string by looping over each string in each list and concatenating the two separating them by a space:
listA = ["a","b"]
listb = ["1","2","3"]
new_string = "a1 a2 a3 b1 b2 b3"
4 Answers
It is really simple
print( ' '.join([ str(i)+str(j) for i in listA for j in listB]))
3 Comments
Rajan Chauhan
@whackamadoodle can you point out the mistake what it is specifically.
whackamadoodle3000
Sorry, I misinterpreted the question, mine does not work. I just deleted it
yupe
The method is great, but the result lacks the backspace.
' '.join([str(i)+str(j)+' ' for i in listA for j in listB]))Try this:
from itertools import product
listA = ["a","b"]
listb = ["1","2","3"]
new_string = " ".join(a + b for a, b in product(listA, listb))
print(new_string)
>>> a1 a2 a3 b1 b2 b3
Comments
In [14]: ' '.join([' '.join(x + i for i in listb) for x in listA])
Out[14]: 'a1 a2 a3 b1 b2 b3'
Comments
Here is a pretty simple solution to the problem, it is usually taught in the beginning of learning for loops (at least it was for me):
listA = ["a","b"]
listb = ["1","2","3"]
new_string = ""
for i in listA:
for j in listb:
#adding a space at the end of the concatenation
new_string = new_string+i+j+" "
print(new_string)
Coded in python 3.
' '.join(map(''.join, itertools.product(listA, listb)))