how to check if eleement is on the list code example

Example 1: check if list of list python

for item in list_of_lists:
      isinstance(item, list)

Example 2: how to check if element is in list python

'''    
    check if element NOT exist in list using 'in'
'''
if 'time' not in listOfStrings :
    print("Yes, 'time' NOT found in List : " , listOfStrings)