how to check if an array has a specific value in python code example

Example 1: how to check an array for a value in python

s = set(a)
if 7 in s:
  # do stuff

Example 2: python find if part of list is in list

'''    
    check if list1 contains all elements in list2
'''
result =  all(elem in list1  for elem in list2)
if result:
    print("Yes, list1 contains all elements in list2")    
else :
    print("No, list1 does not contains all elements in list2"