Type hints are an optional extra bits of code that declare the intended types for function arguments and returns. Adding type hints to Python code is basically sharing the developers intentions in the code. It is stating something like “the person who wrote this code says that this variable is a String and should always remain a String. If you are writing code that interacts with this it is safe for you to assume this variable will be a String.”
Since Python is a dynamically-typed language, it is not required for us to declare types like this, but there are some benefits of doing so even though it isn’t required.
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