What new features are added in Python 3.10 version?

In this article, we will learn the new features in Python 3.10, compared to 3.9. Let’s see the features −

Parenthesized context managers

Now supports using parentheses to continue context managers across multiple lines. This formats a long collection of context managers into multiple lines in a similar manner to the previous import statement.

User-Defined Type Guards

TypeGuard has been added to the typing module to annotate type guard functions and improve information provided to static type checkers during type narrowing.

Enhanced error messages

If you encounter an error when running a Python program, the error message will now be more accurate and provide the exact error message

The Chinese translation of

SyntaxError

is:

SyntaxError

When parsing code that contains unclosed parentheses or brackets, the interpreter now includes the location of the unclosed parentheses or brackets, rather than displaying SyntaxError: unexpected EOF while parsing or pointing to the wrong location

SyntaxError exceptions raised by the interpreter will now highlight the full error range of the expression that constitutes the syntax error itself, instead of just where the problem is detected.

IndentationErrors

is translated as:

Indentation Errors

Many IndentationError exceptions now provide more contextual information about the type of block that is expected to be indented

Exact line numbers for debugging

More precise and reliable line numbers for debugging, profiling and coverage tools. Tracing events, with the correct line number, are generated for all lines of code executed and only for lines of code that are executed.

Structural Pattern Matching

Structural pattern matching has been added via match statements and case statements with patterns of associated operations. Patterns include sequences, maps, primitive data types, and class instances. Pattern matching enables programs to extract information from complex data types, branch based on the structure of the data, and apply specific operations based on different forms of data.

Enhancement module

The following modules add new functions, new methods, etc.

array − The index() method of array.array now has optional start and stop parameters.

base64 − Added base64.b32hexencode() and base64.b32hexdecode() to support the Base32 Encoding with Extended Hex Alphabet.

bisect − Added the possibility of providing a key function to the APIs in the bisect module.

contextlib − Added a contextlib.aclosing() context manager for safely closing asynchronous generators and objects representing asynchronously releasing resources.

distutils − The distutils package is deprecated, to be removed in Python 3.12.

encodings − The encodings.normalize_encoding() now ignores non-ASCII characters.

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