Python 3.7.1 properly print Enum str values

Author: davecom

Chapter1/calculating_pi.py

@@ -13,6 +13,8 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+
 def calculate_pi(n_terms: int) -> float:
     numerator: float = 4.0
     denominator: float = 1.0
@@ -26,4 +28,4 @@ def calculate_pi(n_terms: int) -> float:
 
 
 if __name__ == "__main__":
-    print(calculate_pi(1000000))
+    print(calculate_pi(1000000))

Chapter8/connectfour.py

@@ -33,6 +33,9 @@ def opposite(self) -> C4Piece:
         else:
             return C4Piece.E
 
+    def __str__(self) -> str:
+        return self.value
+
 
 def generate_segments(num_columns: int, num_rows: int, segment_length: int) -> List[List[Tuple[int, int]]]:
     segments: List[List[Tuple[int, int]]] = []

Chapter8/tictactoe.py

@@ -33,6 +33,9 @@ def opposite(self) -> TTTPiece:
         else:
             return TTTPiece.E
 
+    def __str__(self) -> str:
+        return self.value
+
 
 class TTTBoard(Board):
     def __init__(self, position: List[TTTPiece] = [TTTPiece.E] * 9, turn: TTTPiece = TTTPiece.X) -> None: