how to check if something is a list in python code example

Example 1: check if list of list python

for item in list_of_lists:
      isinstance(item, list)

Example 2: Check if element in list Python

listA = [item1, item2, item3]
if item4 in listA:
  print('yes, item4 is in the list')
else:
  print('no, item4 is not in the list')

Example 3: 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)

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