From b63ba2c3686c1d209aec940f19af0eb9101c53b4 Mon Sep 17 00:00:00 2001
From: Pengfei Chen <pengfeichen@google.com>
Date: Wed, 11 Oct 2023 14:18:15 -0700
Subject: [PATCH] remove raise

---
 .../examples/quantum_chinese_chess/chess.py   | 39 ++++++-------------
 1 file changed, 12 insertions(+), 27 deletions(-)

diff --git a/unitary/examples/quantum_chinese_chess/chess.py b/unitary/examples/quantum_chinese_chess/chess.py
index 78f35797..991cd8a8 100644
--- a/unitary/examples/quantum_chinese_chess/chess.py
+++ b/unitary/examples/quantum_chinese_chess/chess.py
@@ -295,10 +295,7 @@ def classify_move(
 
     def apply_move(self, str_to_parse: str) -> None:
         """Check if the input string is valid. If it is, determine the move type and variant and return the move."""
-        try:
-            sources, targets = self.parse_input_string(str_to_parse)
-        except ValueError as e:
-            raise e
+        sources, targets = self.parse_input_string(str_to_parse)
 
         # Additional checks based on the current board.
         for source in sources:
@@ -324,10 +321,7 @@ def apply_move(self, str_to_parse: str) -> None:
         classical_pieces_0, quantum_pieces_0 = self.board.path_pieces(
             sources[0], targets[0]
         )
-        try:
-            self.check_classical_rule(sources[0], targets[0], classical_pieces_0)
-        except ValueError as e:
-            raise e
+        self.check_classical_rule(sources[0], targets[0], classical_pieces_0)
 
         # Check if the second path (if exists) satisfies the classical rule.
         classical_pieces_1 = None
@@ -337,30 +331,21 @@ def apply_move(self, str_to_parse: str) -> None:
             classical_pieces_1, quantum_pieces_1 = self.board.path_pieces(
                 sources[1], targets[0]
             )
-            try:
-                self.check_classical_rule(sources[1], targets[0], classical_pieces_1)
-            except ValueError as e:
-                raise e
+            self.check_classical_rule(sources[1], targets[0], classical_pieces_1)
         elif len(targets) == 2:
             classical_pieces_1, quantum_pieces_1 = self.board.path_pieces(
                 sources[0], targets[1]
             )
-            try:
-                self.check_classical_rule(sources[0], targets[1], classical_pieces_1)
-            except ValueError as e:
-                raise e
+            self.check_classical_rule(sources[0], targets[1], classical_pieces_1)
         # Classify the move type and move variant.
-        try:
-            move_type, move_variant = self.classify_move(
-                sources,
-                targets,
-                classical_pieces_0,
-                quantum_pieces_0,
-                classical_pieces_1,
-                quantum_pieces_1,
-            )
-        except ValueError as e:
-            raise e
+        move_type, move_variant = self.classify_move(
+            sources,
+            targets,
+            classical_pieces_0,
+            quantum_pieces_0,
+            classical_pieces_1,
+            quantum_pieces_1,
+        )
 
         if move_type == MoveType.CLASSICAL:
             if source_0.type_ == Type.KING: