Python | Check if a list is contained in another list
Given two lists A and B, write a Python program to Check if list A is contained in list B without breaking A’s order.
Input : A = [1, 2], B = [1, 2, 3, 1, 1, 2, 2] Output : True Input : A = ['x', 'y', 'z'], B = ['x', 'a', 'y', 'x', 'b', 'z'] Output : False
Approach #1 : Naive Approach
A simple naive approach is to use two for loops and check if the whole list A is contained within list B or not. If such a position is met in list A, then break the loop and return true, otherwise false
Approach #2 : List comprehension
A more efficient approach is to use List comprehension. We first initialize ‘n’ with length of A. Now use a for loop till len(B)-n and check in each iteration if
A == B[i:i+n] or not.
Approach #3 : Using join and map module
Here we use join to join both lists to strings and then use in operator to check if list A is contained in B or not.