Python double for function [duplicate]

Question

I built this Python code with the intent to match each first name with the last name:

first_names = ['Jane','Sam','Deborah']
last_names = ['Simmons','Kaybone','Stone']

for f_name in first_names:
    for l_name in last_names:
        print(f_name.title() + " " + l_name.title())

But apparently my code prints out all first names with all last_names instead of just (1,1), (2,2), (3,3). How do I tweak this code? Thanks!

If you wanted to print out (1, 1), (1, 2), (1, 3), (2, 1), (2, 2), (2, 3), (3, 1), (3, 2), (3, 3) how would you expect to do it? — Open AI - Opting Out
– Open AI - Opting Out, Commented Dec 12, 2019 at 9:41
Does this answer your question? Problem in looping two for loops at the same time in python — peer
– peer, Commented Dec 12, 2019 at 9:42

Sayandip Dutta · Accepted Answer · 2019-12-12 09:53:15Z

2

You are looking for zip:

first_names = ['Jane','Sam','Deborah']
last_names = ['Simmons','Kaybone','Stone']
for f, l in zip(first_names, last_names):
    print(f.title(),l.title())

Output:

Jane Simmons
Sam Kaybone
Deborah Stone

One-liner:

print(*(f'{f.title()} {l.title()}' for f, l in zip(first_names, last_names)),sep='\n')

EDIT: As pointed correctly by Peter Wood:

print(*(f'{f} {l}'.title() for f, l in zip(first_names, last_names)),sep='\n')

edited Dec 12, 2019 at 9:53

answered Dec 12, 2019 at 9:39

Sayandip Dutta

15.9k4 gold badges27 silver badges57 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Open AI - Opting Out Over a year ago

Why not call str.title once?

Sayandip Dutta Over a year ago

Just slipped my mind. Edited.

mrhd · Accepted Answer · 2019-12-12 09:42:32Z

2

What you want is zip():

first_names = ['Jane','Sam','Deborah']
last_names = ['Simmons','Kaybone','Stone']

for f_name, l_name in zip(first_names, last_names):
  print(f_name + " " + l_name)

answered Dec 12, 2019 at 9:42

mrhd

1,0867 silver badges16 bronze badges

Collectives™ on Stack Overflow

Python double for function [duplicate]

2 Answers 2

2 Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Linked

Related