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Release highlights

New syntax features: 

• A global or nonlocal statement must now textually appear before the first use of the affected name in the same scope. Previously this was a SyntaxWarning.
• PEP 498: Formatted string literals
• PEP 515: Underscores in Numeric Literals
• PEP 526: Syntax for Variable Annotations
• PEP 525: Asynchronous Generators
• PEP 530: Asynchronous Comprehensions

Security improvements: 

• On Linux, os.urandom() now blocks until the system urandom entropy pool is initialized to increase the security. See the PEP 524for the rationale.
• hashlib and ssl now support OpenSSL 1.1.0.
• The default settings and feature set of the ssl have been improved.
• The hashlib module has got support for BLAKE2, SHA-3 and SHAKE hash algorithms and scrypt() key derivation function.

 Windows improvements:

• PEP 529: Change Windows filesystem encoding to UTF-8
• PEP 528: Change Windows console encoding 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 when the 260 character path limit may no longer apply. See removing the MAX_PATH limitation for details.
• A sys.path file can be added to force isolated mode and fully specify all search paths to avoid registry and environment lookup. Seethe documentation for more information.
• A python36.zip file now works as a landmark to infer PYTHONHOME. See the documentation for more information.
• PEP 520: Preserving Class Attribute Definition Order
• PEP 468: Preserving Keyword Argument Order 

The next planned release of Python 3.6 will be 3.6.0b2, currently scheduled for 2016-10-03.

More information about the release schedule can be found here: https://www.python.org/dev/peps/pep-0494/

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