nonetype object is not subscriptable python dictionary

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title: understanding and handling "nonetype' object is not subscriptable" in python dictionaries
introduction:
in python, the error message "nonetype' object is not subscriptable" is a common issue that arises when trying to access or manipulate a dictionary key that does not exist or when attempting to perform an operation on a variable with a value of none. this tutorial aims to provide a clear understanding of this error and guide you on how to handle it effectively.
error explanation:
the error typically occurs when you attempt to access or modify an element using square brackets ([]) on a variable that evaluates to none. in the context of dictionaries, this often happens when trying to access a key that is not present in the dictionary.
handling the error:
by incorporating these practices, you can effectively prevent and handle the "nonetype' object is not subscriptable" error in python dictionaries, ensuring more robust and error-resistant code.
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