Update app.py

app.py

@@ -1,14 +1,15 @@
 import copy
 import os
 import random
-
-os.system('pip install dashscope')
 import gradio as gr
 import dashscope
 from dashscope import VideoSynthesis
 from examples import t2v_examples, i2v_examples
 import time
 
+os.system('pip install pydantic dashscope')
+
+# Set API key
 DASHSCOPE_API_KEY = os.getenv('DASHSCOPE_API_KEY')
 dashscope.api_key = DASHSCOPE_API_KEY