Python – function find list in list

I wrote the function to find list A is in List B, the code as below:

def isinlist(l1,l2):
    flag=1
    for i in range(0,len(l1)+1):
        if l1[i] not in l2:
            flag = 0
    return flag
a1 = ['hello','hi','123']
a2 = ['no worry','hello','hi','123'' ]# f1 = isinlist() 
print(isinlist(a1,a2)) 

it show the error as below

IndexError: list index out of range

I thought the error come from l1 and l2 wasn’t defined range in the function? Can someone help advise on this ?

>Solution :

the issue id in the line

for i in range(0,len(l1)+1):

in this loop i will eventually be larger than the length of l1 and thus l1[i] will be out of range

instead use

for i in range(len(l1)):

(range() starts at 0 by default)