{"id":12881,"date":"2020-05-19T00:53:58","date_gmt":"2020-05-19T07:53:58","guid":{"rendered":"https:\/\/careerkarma.com\/blog\/?p=12881"},"modified":"2023-12-01T02:47:32","modified_gmt":"2023-12-01T10:47:32","slug":"python-any-and-all","status":"publish","type":"post","link":"https:\/\/careerkarma.com\/blog\/python-any-and-all\/","title":{"rendered":"How to Use Python Any and All: A Step-By-Step Guide"},"content":{"rendered":"\n

The Python <\/em>any()<\/em><\/code> and <\/em>all()<\/em><\/code> functions evaluate the items in a list to see which are true. The <\/em>any()<\/em><\/code> method returns true if any of the list items are true, and the <\/em>all()<\/em><\/code> function returns true if all the list items are true.<\/em><\/p>\n\n\n\n

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Often, when you\u2019re programming, you may want to check whether any or all of the values in a list evaluate to True. For instance, if you\u2019re creating a program that tracks the racing history of a driver, you may want to calculate whether that driver has lost any or all of the races in a particular season. <\/p>\n\n\n\n

That\u2019s where the Python built-in functions any()<\/code> and all()<\/code> come in. any()<\/code> iterates through every item in an object and returns True if any item is equal to True. all()<\/code> goes through every item in an object and returns True only if every item in the object is equal to True.<\/p>\n\n\n\n

This tutorial will discuss how to use the any()<\/code> and all()<\/code> methods in Python, and explore an example of each of these methods in a program.<\/p>\n\n\n\n

Python Any<\/h2>\n\n\n\n

The Python any()<\/code> method calculates whether any value in an iterable object\u2014a list, string, or tuple\u2014is equal to True and returns True; otherwise, any()<\/code> returns False.<\/p>\n\n\n\n

The any()<\/code> method accepts one parameter: the object with the values you want to search. Here\u2019s the syntax for the any()<\/code> method:<\/p>\n\n\n\n

any(iterable_object)<\/pre><\/div>\n\n\n\n
any()<\/code> returns True if at least one item in an iterable is True.<\/p>\n\n\n\n
Otherwise, any()<\/code> will return False if all the elements are not True, or if an iterable object is empty.<\/p>\n\n\n\n
Any() With an Array<\/h3>\n\n\n\n
Let\u2019s say that we work for a data science company that is analyzing the scores for racers. We have been tasked to find out whether John Appleseed has ever ranked in the top 10 of an Indianapolis 500 race. We have a list of his entries in the race which stores True if he ranked in the top 10, and False if he did not.<\/p>\n\n\n\n
To find out whether he has ever ranked in the top 10 of an Indy 500 race, we could use the following code:<\/p>\n\n\n\n
race_wins_indy_500 = [False, False, True, False]\nprint(any(race_wins_indy_500))<\/pre><\/div>\n\n\n\n
Our code returns: True<\/code>.  <\/p>\n\n\n\n
n the first line of our code, we define a list of values that stores whether he ranked in the top 10 in each time he entered the Indy 500 race. Then, we use the any()<\/code> method to check if any item in the list is True. In this case, he has ranked in the top 10 for the Indy 500 race once, so the any()<\/code> method returned True.<\/p>\n\n\n\n
Any() With a Dictionary<\/h3>\n\n\n\n
We can also use the any()<\/code> method in a dictionary. Say that we have a record of John Appleseed\u2019s entry at an individual Indy 500 race\u2014the 2018 race\u2014and we want to see whether he ranked in the top 10 for the race. We could do so using this code:<\/p>\n\n\n\n
indy_500_2018_john = {\n\t'driver_name': 'John Appleseed',\n\t'race_year': 2018,\n\t'top_ten': True\n}\nprint(any(indy_500_2018_john))<\/pre><\/div>\n\n\n\n
Our code returns: True. Because our dictionary contains a True value, the any()<\/code> method returns True.<\/p>\n\n\n\n
Any() With a String<\/h3>\n\n\n\n
Similarly, any()<\/code> can be used with a string or a tuple. In the case of a string, the any()<\/code> method will return True if the string contains a value; otherwise, it will return False.<\/p>\n\n\n\n
Let\u2019s say that we want to check whether a string that stores the player\u2019s top 10 ranking for the latest Indy 500 race contains a value. We could use the following code to accomplish this task:<\/p>\n\n\n\n
top_10_ranking = \"\"\nprint(any(top_10_ranking))<\/pre><\/div>\n\n\n\n
Our code returns: False. Because John Appleseed did not win the latest Indy 500 race, the variable top_10_ranking<\/code> is empty. So, because the string is empty, our program evaluates to False.<\/p>\n\n\n\n
Python All<\/h2>\n\n\n\n
all()<\/code> is a built-in Python function that returns True when all items in an iterable object are True, and returns False otherwise. In addition, if the iterable object is empty, the all()<\/code> method will return True.<\/p>\n\n\n\n
The syntax for the all()<\/code> method is the same as the any()<\/code> method. all()<\/code> takes in a single parameter, which is the iterable object through which the all()<\/code> method should search. Here\u2019s the syntax for the all()<\/code> method:<\/p>\n\n\n\n
all(iterable_object)<\/pre><\/div>\n\n\n\n
all()<\/code> returns True when:<\/p>\n\n\n\n