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pythonstringlistconcatenation

Concatenate elements from two lists into a third one in python

a = ['1', '2', '3']
b = ['a', 'b', 'c']
c = []

What can I do to get the third list to be the concatenation of the corresponding elements from lists a and b, as in:

c = ['1a', '2b', '3c']

Solution

  • Here is a simple while loop to do the trick:

    a = ['1', '2', '3']
b = ['a', 'b', 'c']
c = []

counter = 0
while counter < len(a):
    c.append(a[counter] + b[counter])
    counter += 1

print(c)

    Obviously, there are more elegant methods to do this, such as using the zip method:

    a = ['1', '2', '3']
b = ['a', 'b', 'c']
c = [x + y for x,y in zip(a, b)]

print(c)

    Both methods have the same output:

    ['1a', '2b', '3c']