My goal is using Python 3 to check if there are any top 3 letters that overlap between List_A and List_B, and print the overlap data from List_B.
List_A = ["apple123","banana3","345banana","cat123","apple456"] List_B = ["apple123","345123","dog234","apple4","cat002345"]
The following is the for loop of printing the overlap data between List_A and List_B.
for i in List_A: if i in List_B: print(i)
The output is
Next, I try to select the first 3 letters and append them in the new List of A and B, then compare if there is any overlap.
List_A1 =  for i in List_A: List_A1.append(i[0:3]) List_B1 =  for i in List_B: List_B1.append(i[0:3]) # check if any top 3 letters overlap for i in List_A1: if i in List_B1: print(i)
the output is
app 345 cat app
However, my expected output is the original data in List_B, such as:
apple123 345123 apple4 cat002345
May I ask how could I modify the code?
The code was printing the elements in 3-letters list. You might first get its index and print the overlapped with same index in original list.
# for i in List_A1: # changes from here... for i in range(len(List_A1)): # per each index i in List_A1 if List_A1[i] in List_B1: # element i overlapped in List_B1 print(List_A[i]) # print the item in List_A by same index