typed-astunparse is to typed-ast as astunparse is to ast
The typed-astunparse is to typed-ast as astunparse is to ast. In short: unparsing of Python 3 abstract syntax trees (AST) with type comments.
The built-in ast module can parse Python source code into AST. It can’t, however, generate source code from the AST. That’s where astunparse comes in. Using a refactored version of an obscure script found in official Python repository, it provides code generation capability for native Python AST.
The ast and astunparse modules, however, completely ignore type comments introduced in
PEP 484. They treat them like all other comments, so when you parse the code using
compile(), your type comments will be lost. There is no place for them in the AST, so
obviously they also cannot be unparsed.
The typed-ast module provides an updated AST including type comments defined in PEP 484 and a parser for Python code that contains such comments.
Unfortunately, typed-ast doesn’t provide any means to go from AST back to source code with type comments. This is where this module, typed-astunparse, comes in. It provides unparser for AST defined in typed-ast.
This package is intended for Python 3.3 and later. It is tested on Linux (Travis CI) and Windows (AppVeyor), but it might work on other systems too.
typed-astunparse mainly depends on:
For simplest installation use
pip install typed-astunparse
You can also build your own version:
git clone https://github.com/mbdevpl/typed-astunparse cd typed-astunparse python -m unittest discover # make sure the tests pass python setup.py bdist_wheel ls -1tr dist/*.whl | tail -n 1 | xargs pip install
Example of roundtrip from code through AST to code:
import typed_ast.ast3 import typed_astunparse code = 'my_string = None # type: str' roundtrip = typed_astunparse.unparse(typed_ast.ast3.parse(code)) print(roundtrip)
for more examples see
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|File Name & Checksum SHA256 Checksum Help||Version||File Type||Upload Date|
|typed_astunparse-2.0.0-py3-none-any.whl (13.5 kB) Copy SHA256 Checksum SHA256||py3||Wheel||Mar 17, 2017|
|typed-astunparse-2.0.0.tar.gz (16.3 kB) Copy SHA256 Checksum SHA256||–||Source||Mar 17, 2017|