Feb. 3, 2026
subprocess Polling subprocess module relies on busy-loop polling to determine whether a process has completed yet. Modern operating systems have callback mechanisms to do this, and Python 3.15 will now take advantage of these..__call__() \z Not $ With Python Regular Expressions $ in a regular expression is used to matching the end of a line, but in Python, it matches a line end both with and without a \n. Python 3.14 added support for \z, which is widely supported by other languages, to get around this problem.uv Cheatsheet uv cheatsheet that lists the most common and useful uv commands across project management, working with scripts, installing tools, and more!