[Bug]: Python typed-receiver calls get no edge inside a nested function or a nested class's method #4226

Pre-flight checks

• I have checked the Troubleshooting section in the README

What happened?

The typed-receiver arm of _resolve_python_member_calls (#4198) checks that the receiver's class is defined in, or imported into, the caller's file. It finds the caller's file with _file_node, which returns the caller's first contains parent. For a top-level function or a method that parent is the file, but for a nested function it is the enclosing function, and for a method of a nested class it is the outer class. The check then compares a function (or class) id with the file's imports, fails, and the call gets no edge, although the extractor stamped the right receiver_type.

Nested typed callbacks are common, e.g. click's option factories:

# click/decorators.py
def confirmation_option(*param_decls, **kwargs):
    def callback(ctx: Context, param: Parameter, value: bool) -> None:
        if not value:
            ctx.abort()            # receiver_type: Context, but no edge to Context.abort

Measured against jedi on 0.9.80: click has 10 such calls (ctx.exit(), ctx.abort(), ...), rich 4; all 14 are real calls jedi resolves to the same method.

Steps to reproduce

mkdir -p demo/pkg && cd demo
touch pkg/__init__.py
printf 'class Client:\n    def send(self):\n        return 1\n' > pkg/client.py
cat > pkg/use.py <<'EOF'
from .client import Client

def top(c: Client):
    return c.send()

def outer():
    def inner(c: Client):
        return c.send()
    return inner
EOF
graphify update . --no-cluster
python -c "import json; g=json.load(open('graphify-out/graph.json')); n={x['id']:x['label'] for x in g['nodes']}; [print(n[e['source']], '->', n[e['target']]) for e in g.get('links', g.get('edges', [])) if e['relation']=='calls']"

Error output or graph output

top() -> .send()

`inner() -> .send()` is missing. Same for `class Outer: class Inner: def go(self, c: Client): c.send()`.

Graphify version

0.9.80 (6478eb7)

Operating System

Windows

Python Version

3.12

Installation Method

built from source (git clone)

Additional Environment Details

No LLM keys; AST only. Clean checkout of v8 @ 6478eb7 reproduces.

Additional context

Follow-up to #4198 (where this arm was added). PR right after this issue.