Python | Test if all elements are present in list
Sometimes, while working with Python list, we have a problem in which we need to check for a particular list of values and want to be sure if a target list contains all the given values. This has it’s application in web development domain when required some type of filtering. Let’s discuss a way in which this task can be performed.
Method : Using list comprehension + all()
This task can be performed using the inbuilt functionality of all(). The all() can be fed with list comprehension logic to check if element of test list is present in target list and rest is done by all().
# Python3 code to demonstrate working of # Test if all elements are present in list # Using list comprehension + all() # initializing list target_list = [6, 4, 8, 9, 10] # initializing test list test_list = [4, 6, 9] # printing lists print("The target list : " + str(target_list)) print("The test list : " + str(test_list)) # Test if all elements are present in list # Using list comprehension + all() res = all(ele in target_list for ele in test_list) # Printing result print("Does every element of test_list is in target_list ? : " + str(res)) |
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Output :
The target list : [6, 4, 8, 9, 10] The test list : [4, 6, 9] Does every element of test_list is in target_list ? : True
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