Update app.py

app.py

@@ -1,5 +1,5 @@
 '''
-AWS Exam Simulator v.03.1
+AWS Exam Simulator v.03.2
 Program Developed by Ruslan Magana Vsevolovna
 The purpose of this program is help to practice the questions of AWS Exams.
 '''
@@ -31,18 +31,53 @@ def select_exam_vce(exam_name):
         print(f"File {file_path} not found.")
         return []  # Return an empty list to indicate no questions were found
 
-# Text-to-speech function
-client = Client("ruslanmv/text-to-speech-fast")
-def text_to_speech(text):
-    result = client.predict(
-            language="English",
-            repo_id="csukuangfj/vits-piper-en_US-hfc_female-medium|1 speaker",
-            text=text,
-            sid="0",
-            speed=0.8,
-            api_name="/process"
-    )
-    return result  # result is already the path to the audio file
+import time
+import httpx
+# Text-to-speech clients 
+client_1 = Client("ruslanmv/text-to-speech-fast")
+client_2 = Client("ruslanmv/Text-To-Speech")
+client_3 = Client("ruslanmv/Text-to-Voice-Transformers")
+clients = [client_1, client_2, client_3]
+# Text-to-speech function with rate limiting, retry mechanism, and client rotation
+def text_to_speech(text, retries=3, delay=5):
+    client_index = 0  # Start with the first client
+    
+    for attempt in range(retries):
+        try:
+            client = clients[client_index]
+            print(f"Attempt {attempt + 1}")
+
+            if client_index == 0:
+                result = client.predict(
+                    language="English",
+                    repo_id="csukuangfj/vits-piper-en_US-hfc_female-medium|1 speaker",
+                    text=text,
+                    sid="0",
+                    speed=0.8,
+                    api_name="/process"
+                )
+            else:
+                result = client.predict(
+                    text=text,
+                    api_name="/predict"
+                )
+
+            return result
+
+        except httpx.HTTPStatusError as e:
+            if e.response.status_code == 429:
+                print(f"Rate limit exceeded. Retrying in {delay} seconds...")
+                client_index = (client_index + 1) % len(clients)  # Rotate to the next client
+                time.sleep(delay)
+            else:
+                raise e
+
+    print("Max retries exceeded. Could not process the request.")
+    return None
+
+
+
+
 
 # Global variable to store selected questions
 selected_questions = []
@@ -188,11 +223,3 @@ demo.launch()
 
 ### Notes revision v0.3.1
 #In this revised code, JavaScript is used to stop any currently playing audio when a new audio is about to be played. The _js parameter is added to the click function of the buttons that play audio (answer_button, next_button, and prev_button) to ensure that no multiple audios are played simultaneously
-#In this revised code we have removed  the following apis
-#client = Client("ruslanmv/Text-To-Speech")
-#client = Client("ruslanmv/Text-to-Voice-Transformers")
-#result = client.predict(
-#    text=text,
-#    api_name="/predict"
-#)
-# and added client = Client("ruslanmv/text-to-speech-fast")