How to loop through item in two list in python one by one

Question

I was trying to loop through two list which contain two different user, the for loops works when there's item in both list, but it won't works when one of the list doesn't have any item.

customer_list = [["ctm1","Jackson","abc"],["ctm2","Kaijun","edf"]]
  admin_list  = [["adm1","Jackson","martinez"],["adm2","Littsen","Lit"]]

for customer,admin in zip(customer_list, admin_list):
     print(customer,admin)

No item in admin_list

customer_list = [["ctm1","Jackson","abc"],["ctm2","Kaijun","edf"]]
admin_list = []

for customer,admin in zip(customer_list, admin_list):
     print(customer,admin)

It will be good to have an example code for `but it won't works when one of the list doesn't have any item` and the expected output. — shahkalpesh, May 04 '21 at 07:32
@shahkalpesh I have edited the post and provide the example code, I expected the for loop still able to print(customer) — Jackson Tai, May 04 '21 at 07:43
An option is to make both lists the same length when you want to use zip. — John Mommers, May 04 '21 at 07:47

score 2 · Accepted Answer · answered May 04 '21 at 07:34

2

Just need to implement some if’s. Example

a=[]

if a:

Put after your lists but before your for

answered May 04 '21 at 07:34

Mr Matthew Kevin Hutchins

145
11

Md. Mehedi Hasan · Answer 2 · 2021-05-04T07:53:12.433

2

Zip function will take the shortest length of array. You need to check null or empty in this case.

Please check reference. How to iterate through two lists in parallel?

edited May 04 '21 at 07:53

answered May 04 '21 at 07:37

Md. Mehedi Hasan

196
2
14

score 2 · Answer 3 · answered May 04 '21 at 07:47

2

just check if empty or not

l1 = [["ctm1","Jackson","abc"],["ctm2","Kaijun","edf"]]
l2 = [["adm1","Jackson","martinez"],["adm2","Littsen","Lit"]]


l3 = zip(l1, l2) if l1 and l2 else l1 if l1 else l2

for x in l3:
    print(x)

answered May 04 '21 at 07:47

Ali Aref

1,893
12
31

How to loop through item in two list in python one by one

3 Answers3