Python 3.5
Below is a list of finalised/accepted PEPs for Python 3.5 grouped into their impact to MicroPython.
Extensions to the syntax
Status
Property docstrings are now writable. This is especially useful for collections.namedtuple() docstrings
Circular imports involving relative imports are now supported.
New Modules:
Changes to built-in modules:
OrderedDict.items() , OrderedDict.keys() , OrderedDict.values() views now support reversed()
iteration.
The deque class now defines index(), insert(), and copy(), and supports the + and * operators.
Docstrings produced by namedtuple() can now be updated.
The UserString class now implements the __getnewargs__(), __rmod__(), casefold(), format_map(),
isprintable(), and maketrans() methods to match the corresponding methods of str.
A new function isclose() provides a way to test for approximate equality.
A new gcd() function has been added. The fractions.gcd() function is now deprecated.
The urandom() function now uses the getrandom() syscall on Linux 3.17 or newer, and getentropy() on
OpenBSD 5.6 and newer, removing the need to use /dev/urandom and avoiding failures due to potential file
descriptor exhaustion.
New get_blocking() and set_blocking() functions allow getting and setting a file descriptor's blocking
mode (O_NONBLOCK.)
There is a new os.path.commonpath() function returning the longest common sub-path of each passed
pathname
The number of capturing groups in regular expressions is no longer limited to 100.
The sub() and subn() functions now replace unmatched groups with empty strings instead of raising an
exception.
The re.error exceptions have new attributes, msg, pattern, pos, lineno, and colno, that provide better
context information about the error
A new socket.sendfile() method allows sending a file over a socket by using the high-performance
os.sendfile() function on UNIX, resulting in uploads being from 2 to 3 times faster than when using
plain socket.send()
The socket.sendall() method no longer resets the socket timeout every time bytes are received or sent.
The socket timeout is now the maximum total duration to send all data.
The backlog argument of the socket.listen() method is now optional. By default it is set to SOMAXCONN or
to 128, whichever is less.
Complete
Application-Layer Protocol Negotiation Support
There is a new SSLSocket.version() method to query the actual protocol version in use.
The SSLSocket class now implements a SSLSocket.sendfile() method.
The SSLSocket.send() method now raises either the ssl.SSLWantReadError or ssl.SSLWantWriteError
exception on a non-blocking socket if the operation would block. Previously, it would return 0.
The cert_time_to_seconds() function now interprets the input time as UTC and not as local time, per RFC
5280. Additionally, the return value is always an int.
New SSLObject.shared_ciphers() and SSLSocket.shared_ciphers() methods return the list of ciphers sent
by the client during the handshake.
The SSLSocket.do_handshake(), SSLSocket.read(), SSLSocket.shutdown(), and SSLSocket.write()
methods of the SSLSocket class no longer reset the socket timeout every time bytes are received or sent.
The match_hostname() function now supports matching of IP addresses.
A new is_finalizing() function can be used to check if the Python interpreter is shutting down.
Notes
[1]
The MicroPython parser correct ignores all type hints. However, the
typing module is not built-in.