{"id":4751,"date":"2022-09-14T01:23:46","date_gmt":"2022-09-14T01:23:46","guid":{"rendered":"https:\/\/www.pythontutorial.net\/?page_id=4751"},"modified":"2022-09-14T01:25:27","modified_gmt":"2022-09-14T01:25:27","slug":"python-any","status":"publish","type":"page","link":"https:\/\/www.pythontutorial.net\/python-built-in-functions\/python-any\/","title":{"rendered":"Python any"},"content":{"rendered":"\n

Summary: in this tutorial, you will learn how to use the Python any()<\/code> function to check if any element of an iterable is true.<\/p>\n\n\n\n

Introduction to the Python any() function #<\/a><\/h2>\n\n\n\n

The any()<\/code> function accepts an iterable and returns true if any element of the iterable is true:<\/p>\n\n\n

any(iterable)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
If the iterable is empty, the any()<\/code> function returns false. <\/p>\n\n\n\n
Technically, the any()<\/code> function is equivalent to the following:<\/p>\n\n\n
def<\/span> any<\/span>(iterable)<\/span>:<\/span>\n    for<\/span> elem in<\/span> iterable:\n        if<\/span> elem:\n            return<\/span> True<\/span>\n    return<\/span> False<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
By using the any()<\/code> function, you can avoid for<\/code> loops and make your code more concise.<\/p>\n\n\n\n
Python any() function examples #<\/a><\/h2>\n\n\n\n
Let’s take some examples of using the any()<\/code> function.<\/p>\n\n\n\n
1) Simple any() function examples #<\/a><\/h3>\n\n\n\n
The following example uses the any()<\/code> function the checks if a list has any number that is not zero:<\/p>\n\n\n
scores = [0<\/span>, 4<\/span>, 1<\/span>, 2<\/span>]\n\nprint(any(scores))  # True<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Since all non-zero numbers evaluate to true and the scores contain the none zero numbers, the result is true.<\/p>\n\n\n\n
The following example uses the any()<\/code> function to check if a list contains at least one non-empty string:<\/p>\n\n\n
names = [''<\/span>,''<\/span>,'Jane'<\/span>]\nprint(any(names))  # True<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Because the list contains a non-empty string, the any()<\/code> function returns true.<\/p>\n\n\n\n
The following example uses the any()<\/code> function to check if the list contains any truthy value:<\/p>\n\n\n
items = [''<\/span>, False<\/span>, 0<\/span>, ()]\nprint(any(items))  # False<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Because all the elements of the items are falsy, the any()<\/code> function returns false.<\/p>\n\n\n\n
2) Using Python any() function to check if a string contains digits #<\/a><\/h3>\n\n\n\n
The following example checks if a string contains any digit:<\/p>\n\n\n
message = 'Python 101'<\/span>\n\nhas_digit = False<\/span>\nfor<\/span> c in<\/span> message:\n    if<\/span> c.isdigit():\n        has_digit = True<\/span>\n        break<\/span>\n\nprint(has_digit)  # True<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
In this example, we iterate over characters of a string and check if each character is a digit. If so, set the has_digit<\/code> flag to false and exit the loop.<\/p>\n\n\n\n
First, use a list comprehension to check if each character of a string is a digit and store the result in a list:<\/p>\n\n\n
message = 'Python 101'<\/span>\n\ndigits = [c.isdigit() for<\/span> c in<\/span> message]\nprint(digits)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
[False<\/span>, False<\/span>, False<\/span>, False<\/span>, False<\/span>, False<\/span>, False<\/span>, True<\/span>, True<\/span>, True<\/span>]<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Second, pass the result list (digits) to the any()<\/code> function:<\/p>\n\n\n
message = 'Python 101'<\/span>\n\ndigits = [c.isdigit() for<\/span> c in<\/span> message]\nhas_digit = any(digits)\n\nprint(has_digit) # False<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
3) Using Python any() function to combine multiple conditions with logical OR #<\/a><\/h3>\n\n\n\n
Suppose you have many conditions c1, c2, .. cn and you need to check if one of these conditions is true like this:<\/p>\n\n\n
if<\/span> c1 or<\/span> c2 or<\/span> ... cn:\n   pass<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
To make the code cleaner, you can combine these conditions in an iterable and use the any()<\/code> function like this:<\/p>\n\n\n
conditions = (c1, c2, ...cn)\nif<\/span> any(conditions):\n   pass<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
For example,  instead of having this:<\/p>\n\n\n
x = 200<\/span>\n\nif<\/span> x > 10<\/span> or<\/span> x < 100<\/span> or<\/span> x%2<\/span> == 0<\/span>:\n    print(x)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
200<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
you can use the any()<\/code> as follows:<\/p>\n\n\n
x = 200<\/span>\n\nconditions = (x < 10<\/span>, x < 100<\/span>, x % 2<\/span> == 0<\/span>)\n\nif<\/span> any(conditions):\n    print(x)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
It returns the same result.<\/p>\n\n\n\n
Summary #<\/a><\/h2>\n\n\n\n
  • Use Python any()<\/code> function to check if any element of an iterable is true.<\/li><\/ul>\n
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To make it shorter, you can use the any()<\/code> method with a list comprehension<\/a>.<\/p>\n\n\n\n
Note that if you want to check if all elements of an iterable are true, you can use the all()<\/code><\/a> function.<\/p>\n\n\n\n