refactor: cleanups from writing docstring (#1232)

go commit by commit
mostly things like making methods/classes internal

hugr-py/src/hugr/dfg.py

@@ -215,7 +215,7 @@ def _fn_sig(self, func: ToNode) -> PolyFuncType:
 
     def _wire_up(self, node: Node, ports: Iterable[Wire]) -> TypeRow:
         tys = [self._wire_up_port(node, i, p) for i, p in enumerate(ports)]
-        if isinstance(op := self.hugr[node].op, ops.PartialOp):
+        if isinstance(op := self.hugr[node].op, ops._PartialOp):
             op.set_in_types(tys)
         return tys
 

hugr-py/src/hugr/exceptions.py

@@ -34,8 +34,3 @@ def msg(self):
 
 class ParentBeforeChild(Exception):
     msg: str = "Parent node must be added before child node."
-
-
-@dataclass
-class IncompleteOp(Exception):
-    msg: str = "Operation is incomplete, may require set_in_types to be called."

hugr-py/src/hugr/hugr.py

@@ -32,8 +32,8 @@ class NodeData:
     _num_outs: int = 0
     children: list[Node] = field(default_factory=list)
 
-    def to_serial(self, node: Node, hugr: Hugr) -> SerialOp:
-        o = self.op.to_serial(node, self.parent if self.parent else node, hugr)
+    def to_serial(self, node: Node) -> SerialOp:
+        o = self.op.to_serial(self.parent if self.parent else node)
 
         return SerialOp(root=o)  # type: ignore[arg-type]
 
@@ -297,7 +297,7 @@ def _serialise_link(
         return SerialHugr(
             version="v1",
             # non contiguous indices will be erased
-            nodes=[node.to_serial(Node(idx), self) for idx, node in enumerate(node_it)],
+            nodes=[node.to_serial(Node(idx)) for idx, node in enumerate(node_it)],
             edges=[_serialise_link(link) for link in self._links.items()],
         )