Question

I have the following issue:

I need to “mix” respectively two lists in python…

I have this:

names = open('contactos.txt')
numbers = open('numeros.txt')
names1 = []
numbers1= []
for line in numbers:
    numberdata = line.strip()
    numbers1.append(numberdata)
print numbers1

for line in names:  
    data = line.strip()
    names1.append(data)
print names1

names.close()
numbers.close()

This prints abot 300 numbers first, and the respective 300 names later, what I need to do is to make a new file (txt) that prints the names and the numbers in one line, separated by a comma (,), like this:

Name1,64673635
Name2,63513635
Name3,67867635
Name4,12312635
Name5,78679635
Name6,63457635
Name7,68568635
..... and so on...

I hope you can help me do this, I’ve tried with “for”s but I’m not sure on how to do it if I’m iterating two lists at once, thank you 🙂

Answer 1

Utilize zip:

for num, name in zip(numbers, names):
    print('{0}, {1}'.format(num, name))