Update app.py

app.py

@@ -19,7 +19,8 @@ buy_signals = []
 sell_signals = []
 
 class TradingEnv(gym.Env):
-    def _init_(self, data, window_size=50):
+    def __init__(self, data, window_size=50):
+        super(TradingEnv, self).__init__()
         super(TradingEnv, self).__init__()
         self.data = data
         self.window_size = window_size