specified exceptions

main.py

@@ -56,7 +56,11 @@ def main(subreddit_=None, background=None, filename=None, thread_link_=None):
 
     try:
         float(os.getenv("OPACITY"))
-    except:
+    except (
+            ValueError,
+            FloatingPointError,
+            TypeError,
+        ):
         console.print(
             f"[bold red]Please ensure that OPACITY is between 0 and 1 in .env file.[/bold red]"
         )