First of all, sorry about my english is not good. My problem is: I want to find products that can be sold together at one address by similar selling locations in using language Python pandas. For example, my dataframe like: PRODUCT SELLING LOCATIONS A 1, 2, 3 B 2,5 C 7,8,9,10 D 5,4 E 10,11 Result is: A,B,D C,E Reason: Product A and B has same similar selling locations is 2; Product B and D has same similar selling locations is 5. Therefor, A,B,D is can be sold together in one address. Similar to product C and E. Continue reading...