Скачать или смотреть Python contains function to check for an item in list or array

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sure! the `contains` function is not a built-in function in python. however, you can achieve the same functionality using the `in` keyword to check if an item exists in a list or an array.

here's a tutorial on how to use the `in` keyword to check for an item in a list or array in python:

1. **using `in` keyword**:
the `in` keyword is used to check if a value is present in a sequence (list, tuple, string, etc.).



in the code example above, we first create a list `my_list` and an array `my_array`, and then use the `in` keyword to check if certain items exist in them.

2. **using a function**:
if you want to encapsulate this logic into a function, you can create a simple function to check for the presence of an item in a list.



in this code snippet, the `check_item_in_list` function takes an item and a list as parameters and returns `true` if the item is in the list, and `false` otherwise.

that's how you can check for the presence of an item in a list or array in python using the `in` keyword.

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