What are optional types in Python?
An example of an AI chatbot conversation about optional types in Python.
What are optional types in Python?
Optional types in Python allow you to specify that a variable can either hold a value of a certain type or be None.
Can you give me an example of how to use optional types?
Sure! You can use the Optional type from the typing module. For example: def greet(name: Optional[str]) -> str: allows name to be a string or None.
What happens if I don't use optional types?
If you don't use optional types, the type checker will assume the variable must always hold a value of the specified type, which can lead to errors if None is passed.
Are there any best practices for using optional types?
Yes, it's best to use optional types when a variable can genuinely be None, and to document the expected behavior clearly.
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