ParseError: Invalid type comment: (__main__:f.<locals>.A) -> None

[blueyed]

Given t-pyannotate.py:

from pyannotate_runtime import collect_types


collect_types.init_types_collection()
collect_types.start()


def c(obj):
    pass


def f():
    class A:
        pass

    c(A())


f()

collect_types.stop()
collect_types.dump_stats("type_info.json")

Produces:

[
    {
        "path": "t-pyannotate.py",
        "line": 8,
        "func_name": "c",
        "type_comments": [
            "(__main__:f.<locals>.A) -> None"
        ],
        "samples": 1
    },
    {
        "path": "t-pyannotate.py",
        "line": 12,
        "func_name": "f",
        "type_comments": [
            "() -> None"
        ],
        "samples": 1
    },
    {
        "path": "t-pyannotate.py",
        "line": 13,
        "func_name": "A",
        "type_comments": [
            "() -> None"
        ],
        "samples": 1
    }
] 

Running pyannotate -w then crashes:

Traceback (most recent call last):
  File "…/Vcs/pytest/.venv/bin/pyannotate", line 11, in <module>
    load_entry_point('pyannotate', 'console_scripts', 'pyannotate')()
  File "…/Vcs/pyannotate/pyannotate_tools/annotations/__main__.py", line 125, in main
    data = generate_annotations_json_string(
  File "…/Vcs/pyannotate/pyannotate_tools/annotations/main.py", line 60, in generate_annotations_json_string
    signature = unify_type_comments(item.type_comments)
  File "…/Vcs/pyannotate/pyannotate_tools/annotations/main.py", line 27, in unify_type_comments
    arg_types, return_type = infer_annotation(type_comments)
  File "…/Vcs/pyannotate/pyannotate_tools/annotations/infer.py", line 45, in infer_annotation
    arg_types, return_type = parse_type_comment(comment)
  File "…/Vcs/pyannotate/pyannotate_tools/annotations/parse.py", line 216, in parse_type_comment
    return Parser(comment).parse()
  File "…/Vcs/pyannotate/pyannotate_tools/annotations/parse.py", line 225, in __init__
    self.tokens = tokenize(comment)
  File "…/Vcs/pyannotate/pyannotate_tools/annotations/parse.py", line 193, in tokenize
    raise ParseError(original)
pyannotate_tools.annotations.parse.ParseError: Invalid type comment: (__main__:f.<locals>.A) -> None

This is likely due to the "" in there I guess?

pyannotate b7f96ca (current master)

[JukkaL]

The nested class seems to cause the trouble. We could use a short name for the nested class type, or perhaps just filter them out at some point.

[hofrob]

Is it safe to assume that this project is abandoned? This is a major bug which makes this tool unusable. At least I can't figure out a way around this without just manually processing the generated json.

Please archive it and adapt the readme to prevent further headaches.