How to concatenate element-wise two lists in Python

Question

I have two lists and I want to concatenate them element-wise. One of the list is subjected to string-formatting before concatenation.

For example :

a = [0, 1, 5, 6, 10, 11]  b = ['asp1', 'asp1', 'asp1', 'asp1', 'asp2', 'asp2'] 

In this case, a is subjected to string-formatting. That is, new a or aa should be :

aa = [00, 01, 05, 06, 10, 11] 

Final output should be :

c = ['asp100', 'asp101', 'asp105', 'asp106', 'asp210', 'asp211'] 

Can somebody please tell me how to do that?

Answer 1

Use zip:

>>> ["{}{:02}".format(b_, a_) for a_, b_ in zip(a, b)] ['asp100', 'asp101', 'asp105', 'asp106', 'asp210', 'asp211'] 

Answer 2

Using zip

[m+str(n) for m,n in zip(b,a)] 

output

['asp10', 'asp11', 'asp15', 'asp16', 'asp210', 'asp211']