Sometimes, while working with Python, we can have a problem in which we have a record and we need to check if it contains all valid values i.e has any None value. This kind of problem is common in data preprocessing steps. Let’s discuss certain ways in which this task can be performed.
Method #1 : Using any() + map() + lambda Combination of above functions can be used to perform this task. In this, we check for any element using any(), and extension of logic is done by map() and lambda.
Python3
# Python3 code to demonstrate working of# Check if tuple has any None value# using any() + map() + lambda# initialize tupletest_tup = (10, 4, 5, 6, None)# printing original tupleprint("The original tuple : " + str(test_tup))# Check if tuple has any None value# using any() + map() + lambdares = any(map(lambda ele: ele is None, test_tup))# printing resultprint("Does tuple contain any None value ? : " + str(res)) |
The original tuple : (10, 4, 5, 6, None) Does tuple contain any None value ? : True
Method #2: Using not + all() This checks for the truthness of all elements of the tuple using all() and with not, returns True if there is no None element.
Python3
# Python3 code to demonstrate working of# Check if tuple has any None value# using not + all()# initialize tupletest_tup = (10, 4, 5, 6, None)# printing original tupleprint("The original tuple : " + str(test_tup))# Check if tuple has any None value# using not + all()res = not all(test_tup)# printing resultprint("Does tuple contain any None value ? : " + str(res)) |
The original tuple : (10, 4, 5, 6, None) Does tuple contain any None value ? : True
Method #3: Using in operator
Python3
# Python3 code to demonstrate working of# Check if tuple has any None value# initialize tupletest_tup = (10, 4, 5, 6, None)# printing original tupleprint("The original tuple : " + str(test_tup))# Check if tuple has any None valueres = None in test_tup# printing resultprint("Does tuple contain any None value ? : " + str(res)) |
The original tuple : (10, 4, 5, 6, None) Does tuple contain any None value ? : True
Method #4 : Using count() method
Python3
# Python3 code to demonstrate working of# Check if tuple has any None value# initialize tupletest_tup = (10, 4, 5, 6, None)# printing original tupleprint("The original tuple : " + str(test_tup))# Check if tuple has any None valueres = Falseif(test_tup.count(None) >= 1): res = True# printing resultprint("Does tuple contain any None value ? : " + str(res)) |
The original tuple : (10, 4, 5, 6, None) Does tuple contain any None value ? : True
Method #5 : Using filter()+list()+len()+ lambda functions
Python3
# Python3 code to demonstrate working of# Check if tuple has any None value# initialize tupletest_tup = (10, 4, 5, 6, None)# printing original tupleprint("The original tuple : " + str(test_tup))# Check if tuple has any None valueres = len(list(filter(lambda x: x == None, test_tup))) > 0# printing resultprint("Does tuple contain any None value ? : " + str(res)) |
The original tuple : (10, 4, 5, 6, None) Does tuple contain any None value ? : True
Time Complexity: O(N)
Auxiliary Space: O(N)
Method #6: Using itertools.filterfalse()
Python3
#Python3 code to demonstrate working of#Check if tuple has any None valueimport itertoolsimport itertools#initialize tupletest_tup = (10, 4, 5, 6, None)#printing original tupleprint("The original tuple : " + str(test_tup))#Check if tuple has any None valueres = len(list(itertools.filterfalse(lambda x: x is None, test_tup))) < len(test_tup)#printing resultprint("Does tuple contain any None value ? : " + str(res)) |
The original tuple : (10, 4, 5, 6, None) Does tuple contain any None value ? : True
a time complexity of O(n) where n is the number of elements in the tuple. The space complexity is also O(n) for the method which creates a new list or set from the tuple.
Method#7: Using recursion
Python3
# Python3 code to demonstrate working of# Check if tuple has any None valuedef CheckNone(test_tup,i): if len(test_tup) == i: return False if test_tup[i] == None: return True return CheckNone(test_tup,i+1)# initialize tupletest_tup = (10, 4, 5, 6, None)# printing original tupleprint("The original tuple : " + str(test_tup))# Check if tuple has any None valueres = CheckNone(test_tup,0)# printing resultprint("Does tuple contain any None value ? : " + str(res))#This code is contributed Vinay Pinjala. |
The original tuple : (10, 4, 5, 6, None) Does tuple contain any None value ? : True
Time Complexity: O(N)
Auxiliary Space: O(N)
Method#7: Using for loop and is operator.
Python3
#Python3 code to demonstrate working of#Check if tuple has any None value#initialize tupletest_tup = (10, 4, 5, 6, None)#initializing flag with False by defaultflag=False#printing original tupleprint("The original tuple : " + str(test_tup))#Check if tuple has any None value using for loop for i in test_tup: if i is None: flag=True break#printing resultprint("Does tuple contain any None value ? : " + str(flag))#This code contributed by tvsk |
The original tuple : (10, 4, 5, 6, None) Does tuple contain any None value ? : True
Time Complexity: O(N)
Auxiliary Space: O(1)
