Python 3.6.2 released

Second maintenance release with many new features and optimizations
24 July 2017   921
Python

Multi-paradigm programming language with easy-to-use syntax and many features including the support of the object-oriented and structured programming.

Great news for all Python developers. Python 3.6.2 is now available.

Python 3.6.2 is the second maintenance release of Python 3.6, which was initially released in 2016-12 to great interest. With the release of 3.6.2, developers provide the second set of bugfixes and documentation updates to 3.6. The next maintenance release is expected to follow in about 3 months, around the end of 2017-09. Let's see what's inside.

Major new features of the 3.6 series, compared to 3.5

Among the new major new features in Python 3.6 are:

  • PEP 468, Preserving Keyword Argument Order
  • PEP 487, Simpler customization of class creation
  • PEP 495, Local Time Disambiguation
  • PEP 498, Literal String Formatting
  • PEP 506, Adding A Secrets Module To The Standard Library
  • PEP 509, Add a private version to dict
  • PEP 515, Underscores in Numeric Literals
  • PEP 519, Adding a file system path protocol
  • PEP 520, Preserving Class Attribute Definition Order
  • PEP 523, Adding a frame evaluation API to CPython
  • PEP 524, Make os.urandom() blocking on Linux (during system startup)
  • PEP 525, Asynchronous Generators (provisional)
  • PEP 526, Syntax for Variable Annotations (provisional)
  • PEP 528, Change Windows console encoding to UTF-8
  • PEP 529, Change Windows filesystem encoding to UTF-8
  • PEP 530, Asynchronous Comprehensions

New library modules:

  • secrets: PEP 506 – Adding A Secrets Module To The Standard Library.

 CPython implementation improvements:

  • The dict type has been reimplemented to use a more compact representation based on a proposal by Raymond Hettinger and similar to the PyPy dict implementation. This resulted in dictionaries using 20% to 25% less memory when compared to Python 3.5.
  • Customization of class creation has been simplified with the new protocol.
  • The class attribute definition order is now preserved.
  • The order of elements in **kwargs now corresponds to the order in which keyword arguments were passed to the function.
  • DTrace and SystemTap probing support has been added.
  • The new PYTHONMALLOC environment variable can now be used to debug the interpreter memory allocation and access errors.

Significant improvements in the standard library:

  • The asyncio module has received new features, significant usability and performance improvements, and a fair amount of bug fixes. Starting with Python 3.6 the asyncio module is no longer provisional and its API is considered stable.
  • A new file system path protocol has been implemented to support path-like objects. All standard library functions operating on paths have been updated to work with the new protocol.
  • The datetime module has gained support for Local Time Disambiguation.
  • The typing module received a number of improvements.
  • The tracemalloc module has been significantly reworked and is now used to provide better output for ResourceWarning as well as provide better diagnostics for memory allocation errors.

Security improvements:

  • The new secrets module has been added to simplify the generation of cryptographically strong pseudo-random numbers suitable for managing secrets such as account authentication, tokens, and similar.
  • On Linux, os.urandom() now blocks until the system urandom entropy pool is initialized to increase the security. See the PEP 524 for the rationale.
  • The hashlib and ssl modules now support OpenSSL 1.1.0.
  • The default settings and feature set of the ssl module have been improved.
  • The hashlib module received support for the BLAKE2, SHA-3 and SHAKE hash algorithms and the scrypt() key derivation function.

Windows improvements:

  • PEP 528 and PEP 529, Windows filesystem and console encoding changed to UTF-8.
  • The py.exe launcher, when used interactively, no longer prefers Python 2 over Python 3 when the user doesn’t specify a version (via command line arguments or a config file). Handling of shebang lines remains unchanged - “python” refers to Python 2 in that case.
  • python.exe and pythonw.exe have been marked as long-path aware, which means that the 260 character path limit may no longer apply.
  • ._pth file can be added to force isolated mode and fully specify all search paths to avoid registry and environment lookup.
  • python36.zip file now works as a landmark to infer PYTHONHOME.

Related links

What's new in IntelliJ IDEA 2018.2?

New version of popular IDE improved Spring and Spring Boot support
18 July 2018   78

The new version of IDE IntelliJ IDEA from JetBrains under the number 2018.2 has introduced several functions for developers using Spring and Spring Boot frameworks. Among the innovations: support for Spring Integration, runtime diagrams, library bin management and many minor fixes and improvements.

New features of IntelliJ IDEA

Now you can visualize the components in the system using the new Spring Integration diagram. All versions above 5.0 are supported.

Spring Integratio Diagram
Spring Integration Diagram

It shows all the gateways, channels and bridges of the application, regardless of whether they are configured using Java or XML annotations.

The IDE also received code completion and navigation for such integration annotations as @BridgeTo/From and @EnablePublisher:

Integration Annotations
Integration Annotations

In the new version of IntelliJ IDEA, you can view the dependencies during the execution of the Spring Boot application as a diagram through the control panel. To do this, go to the "Endpoints" section and enable the "Diagram Mode" function:

Runtime Dependencies
Runtime Dependencies

If there are too many beans in the project, the non-user codes can be disabled using the new "Show / Hide Library Beans" switch:

Show / Hide library beans
Show / Hide library beans

In addition, in 2018.2, you can start, modify, and test the display of HTTP requests in the "Endpoints" tab:

HTTP request
HTTP request

A complete list of improvements and changes is available in the technical update document. According to the developers, a lot of work has been done to improve performance in large projects.