Method lookup_qualified

mypy/checker.py:7856–7885

(self, name: str)

            raise KeyError(f"Failed lookup: {name}")

    def lookup_qualified(self, name: str) -> SymbolTableNode:
        if "." not in name:
            return self.lookup(name)
        else:
            parts = name.split(".")
            n = self.modules[parts[0]]
            for i in range(1, len(parts) - 1):
                sym = n.names.get(parts[i])
                assert sym is not None, "Internal error: attempted lookup of unknown name"
                assert isinstance(sym.node, MypyFile)
                n = sym.node
            last = parts[-1]
            if last in n.names:
                return n.names[last]
            elif len(parts) == 2 and parts[0] in ("builtins", "typing"):
                fullname = ".".join(parts)
                if fullname in SUGGESTED_TEST_FIXTURES:
                    suggestion = ", e.g. add '[{} fixtures/{}]' to your test".format(
                        parts[0], SUGGESTED_TEST_FIXTURES[fullname]
                    )
                else:
                    suggestion = ""
                raise KeyError(
                    "Could not find builtin symbol '{}' (If you are running a "
                    "test case, use a fixture that "
                    "defines this symbol{})".format(last, suggestion)
                )
            else:
                msg = "Failed qualified lookup: '{}' (fullname = '{}')."
                raise KeyError(msg.format(last, name))

    @contextmanager
    def enter_partial_types(