This is the third in a series of summarizations of what’s in each release of Python. The first two were What’s in which Python 2.x? and What’s in which Python 3.0–3.3?.

Update: I’ve now collected all the “What’s in which Python”s onto a single page: What’s in which Python.

3.4: March 16, 2014

• pip is always available, via ensurepip
• asyncio (provisional API)
• enum
• Other stdlib modules: statistics, pathlib, and tracemalloc

Full list of 3.4 changes.

3.5: September 13, 2015

• async and await syntax
• matrix multiplication operator @
• more unpacking generalizations
• The typing module for type hints
• subprocess.run()
• os.scandir()

Full list of 3.5 changes.

3.6: December 23, 2016

• f-strings
• kwargs and class attributes order is preserved
• dicts happen to be (but are not guaranteed to be) ordered
• underscores in numeric literals
• variable annotations
• secrets module in stdlib

Full list of 3.6 changes.