如何逐一循環python中兩個列表中的項目

Question

我試圖遍歷包含兩個不同用戶的兩個列表，當兩個列表中都有項目時，for 循環有效，但當其中一個列表沒有任何項目時，它不起作用。

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)

admin_list 中沒有項目

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

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

Answer 1

只需要實現一些如果。 例子

a=[]

if a:
  

放在您的列表之后，但在您的 for 之前

Answer 2

Zip function 將采用最短的數組長度。 您需要檢查 null 或在這種情況下為空。

請檢查參考。 如何並行遍歷兩個列表？

Answer 3

只需檢查是否為空

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)