The lists in Python can handle different type of datatypes in it. The manipulation of such lists is complicated. Let’s say we have a problem in which we need to find the min/max integer value in which the list can contain string as a data type i.e heterogenous. Let’s discuss certain ways in which this can be performed.
Method #1 : Using list comprehension + min()/max() + isinstance()
This particular problem can be solved by filtering our search of min/max using the isinstance method, we can filter out the integer value and then can use min/max function to get required min/max value.
# Python3 code to demonstrate # Min / Max in heterogenous list # using list comprehension + min()/max() + isinstance() # initializing list test_list = [3, 'computer', 5, 'geeks', 6, 7] # printing original list print ("The original list is : " + str(test_list)) # using list comprehension + min()/max() + isinstance() # Min / Max in heterogenous list res = min(i for i in test_list if isinstance(i, int)) # printing result print ("The minimum value in list is : " + str(res)) |
The original list is : [3, 'computer', 5, 'geeks', 6, 7] The minimum value in list is : 3
Method #2 : Using lambda + key + max()/min() + isinstance()
The above problem can also be solved using the lambda function as a key in the min()/max() along with the isinstance method which performs the task of checking for integer values.
# Python3 code to demonstrate # Min / Max in heterogenous list # using lambda + key + max()/min() + isinstance() # initializing list test_list = [3, 'computer', 5, 'geeks', 6, 7] # printing original list print ("The original list is : " + str(test_list)) # using lambda + key + max()/min() + isinstance() # Min / Max in heterogenous list res = max(test_list, key = lambda i: (isinstance(i, int), i)) # printing result print ("The maximum value in list is : " + str(res)) |
The original list is : [3, 'computer', 5, 'geeks', 6, 7] The maximum value in list is : 7
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