diff --git a/python/tvm/contrib/relay_viz/__init__.py b/python/tvm/contrib/relay_viz/__init__.py
index 78bbe0e594932..32814b577d0d5 100644
--- a/python/tvm/contrib/relay_viz/__init__.py
+++ b/python/tvm/contrib/relay_viz/__init__.py
@@ -61,11 +61,11 @@ def __init__(
         graph_names = []
         # If we have main function, put it to the first.
         # Then main function can be shown on the top.
-        for gv in global_vars:
-            if gv.name_hint == "main":
-                graph_names.insert(0, gv.name_hint)
+        for gv_node in global_vars:
+            if gv_node.name_hint == "main":
+                graph_names.insert(0, gv_node.name_hint)
             else:
-                graph_names.append(gv.name_hint)
+                graph_names.append(gv_node.name_hint)
 
         node_to_id = {}
         # callback to generate an unique string-ID for nodes.
diff --git a/python/tvm/contrib/relay_viz/interface.py b/python/tvm/contrib/relay_viz/interface.py
index 5802574aa7b41..95beb4f32598c 100644
--- a/python/tvm/contrib/relay_viz/interface.py
+++ b/python/tvm/contrib/relay_viz/interface.py
@@ -158,25 +158,25 @@ def get_node_edges(
     ) -> Tuple[Union[VizNode, None], List[VizEdge]]:
         if isinstance(node, relay.Function):
             return self._function(node, node_to_id)
-        elif isinstance(node, relay.expr.Call):
+        if isinstance(node, relay.expr.Call):
             return self._call(node, node_to_id)
-        elif isinstance(node, relay.expr.Var):
+        if isinstance(node, relay.expr.Var):
             return self._var(node, relay_param, node_to_id)
-        elif isinstance(node, relay.expr.Tuple):
+        if isinstance(node, relay.expr.Tuple):
             return self._tuple(node, node_to_id)
-        elif isinstance(node, relay.expr.TupleGetItem):
+        if isinstance(node, relay.expr.TupleGetItem):
             return self._tuple_get_item(node, node_to_id)
-        elif isinstance(node, relay.expr.Constant):
+        if isinstance(node, relay.expr.Constant):
             return self._constant(node, node_to_id)
         # GlobalVar possibly mean another global relay function,
         # which is expected to in "Graph" level, not in "Node" level.
-        elif isinstance(node, (relay.expr.GlobalVar, tvm.ir.Op)):
+        if isinstance(node, (relay.expr.GlobalVar, tvm.ir.Op)):
             return None, []
-        else:
-            viz_node = VizNode(
-                node_to_id[node], UNKNOWN_TYPE, f"don't know how to parse {type(node)}"
-            )
-            viz_edges = []
+
+        viz_node = VizNode(
+            node_to_id[node], UNKNOWN_TYPE, f"don't know how to parse {type(node)}"
+        )
+        viz_edges = []
         return viz_node, viz_edges
 
     def _var(
diff --git a/python/tvm/contrib/relay_viz/terminal.py b/python/tvm/contrib/relay_viz/terminal.py
index 522e382ebfdf4..7b72d9da43333 100644
--- a/python/tvm/contrib/relay_viz/terminal.py
+++ b/python/tvm/contrib/relay_viz/terminal.py
@@ -131,7 +131,6 @@ class TermGraph(VizGraph):
     """
 
     def __init__(self, name: str):
-        # node_id: [ connected node_id]
         self._name = name
         # A graph in adjacency list form.
         # The key is source node, and the value is a list of destination nodes.
@@ -171,10 +170,10 @@ def edge(self, viz_edge: VizEdge) -> None:
             A `VizEdge` instance.
         """
         # Take CallNode as an example, instead of "arguments point to CallNode",
-        # we want "CallNode points to arguments" here.
+        # we want "CallNode points to arguments" in ast-dump form.
         #
         # The direction of edge is typically controlled by the implemented VizParser.
-        # We need reversion here simply because we leverage default parser implementation.
+        # Reverse start/end here simply because we leverage default parser implementation.
         if viz_edge.end in self._graph:
             self._graph[viz_edge.end].append(viz_edge.start)
         else: