Function findPythonModuleFile

src/resolution/import-resolver.ts:1766–1783

* Find the file node for a Python dotted module path `a.b.c` — a module file * ending in `a/b/c.py`, or a package `a/b/c/__init__.py` (suffix-matched, so a * package rooted under `src/` etc. still resolves). Returns null for * stdlib/external modules (no matching repo file node), so `import os` c

(
  mod: string,
  context: ResolutionContext,
  excludeFilePath: string
)

 * (where `c` is a submodule) resolution.
 */
function findPythonModuleFile(
  mod: string,
  context: ResolutionContext,
  excludeFilePath: string
): Node | null {
  if (!mod || mod.startsWith('.')) return null; // relative imports handled elsewhere
  const rel = mod.replace(/\./g, '/');
  const lastSeg = mod.split('.').pop()!;
  const endsWith = (p: string, want: string): boolean => p === want || p.endsWith('/' + want);
  const moduleFile = context
    .getNodesByName(`${lastSeg}.py`)
    .find((n) => n.kind === 'file' && n.filePath !== excludeFilePath && endsWith(n.filePath, `${rel}.py`));
  if (moduleFile) return moduleFile;
  const pkgFile = context
    .getNodesByName('__init__.py')
    .find((n) => n.kind === 'file' && n.filePath !== excludeFilePath && endsWith(n.filePath, `${rel}/__init__.py`));
  return pkgFile ?? null;
}

/**
 * Resolve a Python ABSOLUTE dotted module import (`import a.b.c`) to its file —