All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

• Support for Python 3.9, including:
  • PEP 614 - Relaxing Grammar Restrictions On Decorators

• await keyword can now be used in f-string expression parts

• args and kwargs could have been renamed incorrectly in Python 2.6/2.7, particularly when reminifying a file

• Optional source transform:
  • convert positional arguments to normal arguments, enabled by default

• Unnecessary spaces after ',' in tuple values
• Removing annotations for positional-only arguments (Thanks luk3yx!)
• --no-remove-annotations argument to pyminify had no effect

• Unnecessary spaces after ';' in minified output have been removed
• Fixed PendingDeprecationWarnings

• Support for Python 3.8 language features:
  • Assignment expressions
  • Positional parameters
  • f-string = specifier

• Removed unnecessary parenthesis around yield statements

• Reading from stdin

• Improved renaming performance

• Removed redundant parentheses from comprehension iteration values

• Optional source transforms:
  • remove object base, enabled by default

• Return statements no longer wrap tuples in extraneous parentheses
• Duplicated literals are only raised to the lowest common function namespace

• Optional source transformations:
  • Rename locals, enabled by default
  • Rename globals, disabled by default

• Minified code will no longer have leading or trailing whitespace
• Generated names for hoisted literals will have an initial underscore if rename globals is disabled
• Suites of simple statements won't create an indented block
• All transforms are now functional on all supported python versions
• The module docstring is not removed by the remove literal statements transformation if there is a name bound for it

• Python 3.7 dataclass field annotations are no longer removed when the remove annotation transformation is enabled

• Optional source transformations:
  • Combine import statements
  • Remove annotations
  • Remove pass statements
  • Remove unused literals, including docstrings
  • Move duplicated literals into module level variables

• python-minifier package
• pyminify command