如何在2系列中使用应用功能？

Question

s1=[[123,456,789...],[234,567,89],.....]
s2=[[123,...],[567,89],.....]
df=[s1,s2]

s2[i]是s1[i]的子列表，意思是set(s2[i])<set(s1[i])

我想添加cols3，使set(s3[i])=set(s1[i])-set(s2[i])

Answer 1

s3=[]
for i in range(len(s1)):
    s3.append(list(set(s1[i])-set(s2[i])))

或

s3=[list(set(s1[i])-set(s2[i]))for i in range(len(s1))]