introduced does_ticker_exist method to TickerFinder

src/ticker_finder.py

@@ -195,9 +195,25 @@ class TickerFinder():
               numalign='left',
               stralign='left')
         return pretty_string
+    
+    def does_ticker_exist(
+            self,
+            ticker: str
+            ) -> bool:
+        """
+        Check whether a given ticker exists in the ticker data.
+        Args:
+        ticker : str
+            The ticker to check
+        Returns:
+        exists : bool
+            True if the ticker exists, False otherwise
+        """
+        return ticker in self.df['ticker'].values
 
 
-if __name__ == "__main__":
-      # results = TickerFinder().download_ticker_data()
-      results = TickerFinder().find_best_matching_ticker_or_title("microsoft")
-      print(results)
+# if __name__ == "__main__":
+      # results = TickerFinder().find_best_matching_ticker_or_title("microsoft")
+      # print(results)
+      # exists = TickerFinder().does_ticker_exist('bbbbb')
+      # print(f'Ticker exists') if exists else print(f'Ticker does not exist')