Python 3.9: What's new in the latest version of Python

The video tutorial covers new features in Python 3.9, focusing on language changes. It introduces the Union operator for merging dictionaries without modifying them in place, new string methods for removing prefixes and suffixes, and enhancements in type hinting that simplify syntax by removing the need for imports from the typing module. These updates aim to make Python programming more efficient and powerful.

What is the main advantage of the new Union operator for dictionaries in Python 3.9?

• It enables recursive merging of dictionary values.

• It automatically sorts dictionary keys.

• It improves the performance of dictionary operations.

• It allows merging dictionaries without modifying the originals.

How does the 'remove prefix' method in Python 3.9 improve string manipulation?

• It reverses the string.

• It changes the case of the string.

• It removes specific substrings from the start of a string without slicing.

• It allows adding prefixes to strings.

Which of the following is NOT a feature of the new string methods in Python 3.9?

• Simplifying string manipulation without slicing.

• Removing prefixes from strings.

• Removing suffixes from strings.

• Changing the case of strings.

What is a key benefit of the new type hinting enhancements in Python 3.9?

• They improve the speed of the Python interpreter.

• They automatically convert types during execution.

• They allow annotations without importing from the typing module.

• They enforce type checking at runtime.

In Python 3.9, what happens if you try to use the new type hinting syntax in Python 3.8?

• It will require imports from the typing module to be recognized.

• It will work without any issues.

• It will cause a runtime error.

• It will automatically convert to the old syntax.