Generate Content using Pydantic Function Calling

This sample demonstrates how to use Pydantic Function declaration to influence the content generated by Gemini MultiModal

Explore further

For detailed documentation that includes this code sample, see the following:

Function calling reference

Code sample

Python

Before trying this sample, follow the Python setup instructions in the Vertex AI quickstart using client libraries . For more information, see the Vertex AI Python API reference documentation .

To authenticate to Vertex AI, set up Application Default Credentials. For more information, see Set up authentication for a local development environment .

  from 
  
 google 
  
 import 
 genai 
 from 
  
 google.genai.types 
  
 import 
 GenerateContentConfig 
 , 
 HttpOptions 
 def 
  
 get_current_weather 
 ( 
 location 
 : 
 str 
 ) 
 - 
> str 
 : 
  
 """Example method. Returns the current weather. 
 Args: 
 location: The city and state, e.g. San Francisco, CA 
 """ 
 weather_map 
 : 
 dict 
 [ 
 str 
 , 
 str 
 ] 
 = 
 { 
 "Boston, MA" 
 : 
 "snowing" 
 , 
 "San Francisco, CA" 
 : 
 "foggy" 
 , 
 "Seattle, WA" 
 : 
 "raining" 
 , 
 "Austin, TX" 
 : 
 "hot" 
 , 
 "Chicago, IL" 
 : 
 "windy" 
 , 
 } 
 return 
 weather_map 
 . 
 get 
 ( 
 location 
 , 
 "unknown" 
 ) 
 client 
 = 
 genai 
 . 
 Client 
 ( 
 http_options 
 = 
 HttpOptions 
 ( 
 api_version 
 = 
 "v1" 
 )) 
 model_id 
 = 
 "gemini-2.5-flash" 
 response 
 = 
 client 
 . 
 models 
 . 
 generate_content 
 ( 
 model 
 = 
 model_id 
 , 
 contents 
 = 
 "What is the weather like in Boston?" 
 , 
 config 
 = 
 GenerateContentConfig 
 ( 
 tools 
 = 
 [ 
 get_current_weather 
 ], 
 temperature 
 = 
 0 
 , 
 ), 
 ) 
 print 
 ( 
 response 
 . 
 text 
 ) 
 # Example response: 
 # The weather in Boston is sunny.

What's next

To search and filter code samples for other Google Cloud products, see the Google Cloud sample browser .

Generate Content using Pydantic Function Calling Stay organized with collections Save and categorize content based on your preferences.

Explore further

Code sample

Python

What's next

Generate Content using Pydantic Function Calling