Major new features of the 3.4 series, compared to 3.3

Python 3.4 includes a range of improvements of the 3.x series, including hundreds of small improvements and bug fixes. Among the new major new features and changes in the 3.4 release series are

• PEP 428, a "pathlib" module providing object-oriented filesystem paths
• PEP 435, a standardized "enum" module
• PEP 436, a build enhancement that will help generate introspection information for builtins
• PEP 442, improved semantics for object finalization
• PEP 443, adding single-dispatch generic functions to the standard library
• PEP 445, a new C API for implementing custom memory allocators
• PEP 446, changing file descriptors to not be inherited by default in subprocesses
• PEP 450, a new "statistics" module
• PEP 451, standardizing module metadata for Python's module import system
• PEP 453, a bundled installer for the pip package manager
• PEP 454, a new "tracemalloc" module for tracing Python memory allocations
• PEP 456, a new hash algorithm for Python strings and binary data
• PEP 3154, a new and improved protocol for pickled objects
• PEP 3156, a new "asyncio" module, a new framework for asynchronous I/O

More resources

• Change log for this release.
• Online Documentation
• What's new in 3.4?
• 3.4 Release Schedule
• Report bugs at https://bugs.python.org.
• Help fund Python and its community.