# Python - Check if a list is contained in another list

PythonServer Side ProgrammingProgramming

Given two different python lists we need to find if the first list is a part of the second list.

## With map and join

We can first apply the map function to get the elements of the list and then apply the join function to cerate a comma separated list of values. Next we use the in operator to find out if the first list is part of the second list.

## Example

Live Demo

listA = ['x', 'y', 't']
listB = ['t', 'z','a','x', 'y', 't']
print("Given listA elemnts: ")
print(', '.join(map(str, listA)))
print("Given listB elemnts:")
print(', '.join(map(str, listB)))

res = ', '.join(map(str, listA)) in ', '.join(map(str, listB))
if res:
print("List A is part of list B")
else:
print("List A is not a part of list B")

## Output

Running the above code gives us the following result −

Given listA elemnts:
x, y, t
Given listB elemnts:
t, z, a, x, y, t
List A is part of list B

## With range and len

We can design a for loop to check the presence of elements form one list in another using the range function and the len function.

## Example

Live Demo

listA = ['x', 'y', 't']
listB = ['t', 'z','a','x', 'y', 't']
print("Given listA elemnts: \n",listA)
print("Given listB elemnts:\n",listB)

n = len(listA)
res = any(listA == listB[i:i + n] for i in range(len(listB) - n + 1))

if res:
print("List A is part of list B")
else:
print("List A is not a part of list B")

## Output

Running the above code gives us the following result −

Given listA elemnts:
['x', 'y', 't']
Given listB elemnts:
['t', 'z', 'a', 'x', 'y', 't']
List A is part of list B