LibCST
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A concrete syntax tree parser and serializer library for Python that preserves many aspects of Python's abstract syntax tree
Below I've attached a real file that has been published on PyPI. It contains an impressively gigantic expression. [huge.txt](https://github.com/Instagram/LibCST/files/12445264/huge.txt) Parsing this file with the current libcst master branch causes a...
Hi, since decorators are sub nodes of `FunctionDef` and `ClassDef` I expected the code range to cover them. Is this intended? ```python import libcst import libcst.metadata as l_metadata metadata_wrapper =...
https://peps.python.org/pep-0586/#shortening-unions-of-literals The parser is trying to see if the string "r+" refers to some stringified-type and fails to parse it as an expression, but it should just take "r+" as...
The library can be built on musl with no issues currently. Confirmed by building it using `alpine:3.17` as a base image: ```dockerfile FROM alpine:3.17 AS build WORKDIR /tmp RUN apk...
Here is a full repro: ``` python import libcst as cst def f(node: cst.Call) -> cst.Call: arg = node.args[0] new_arg = arg.with_changes(value=cst.Integer(value="2")) return node.deep_replace(arg, new_arg) node = cst.ensure_type(cst.parse_expression("func(1)"), cst.Call) print(f(node))...
```python handcrafted = [ # escaped indentation of some kind? 'fr"\\\n"', 'if _:\n _\n\\\nif _:\ _', # mixed tabs and spaces; many variations here 'if _:\n if _:\n\t _', ]...
## Summary Fixes #532 ## Test Plan Unit tests added/tweaked for this case, also the remove imports codemod tests serve as an integration test.
Having access to type information of a node would be hugely beneficial to refactoring. LibCST offers this to [Pyre users via the Pyre Query API](https://libcst.readthedocs.io/en/latest/metadata.html#type-inference-metadata), but not to projects using...
Not sure if this should be considered incorrect, but it was surprising for me. With code like this `vmap(a)(b)`, and the tree like this: ``` Call( func=Call( func=Name( value='vmap', ```...
```python handcrafted = [ # various ways to look like you're calling a keyword '(_ if _ else _)in _', '_ if _ else(lambda:_)', '_ if(_ if _ else _)...