When making requests to APIs, it's common to encounter rate limits that restrict the number of calls you can make within a certain time frame. GitHub Copilot Chat can help you handle these limits by suggesting code to detect rate limit responses and automatically retry requests after a delay.
Example scenario
The following Python code fetches weather data from an external API. If the API has rate limits, requests may fail when limits are exceeded, and your app may need a way to handle these responses gracefully by implementing retry logic.
from flask import Flask, request
import requests
app = Flask(__name__)
WEATHER_API_URL = "https://api.example.com/weather"
@app.route('/get_weather', methods=['GET'])
def get_weather():
city = request.args.get('city')
# Simulate an API request to the external weather service
response = requests.get(WEATHER_API_URL, params={"city": city})
weather_data = response.json()
return weather_data
Example prompt
How can I handle API rate limits within get_weather().
Example response
Note
La respuesta siguiente es un ejemplo. Las respuestas de Copilot Chat no son deterministas, por lo que puedes obtener una respuesta diferente a la aquí mostrada.
Copilot might suggest code that implements a retry mechanism with exponential backoff to limit the frequency of retry attempts.
For example:
import requests
from flask import Flask, request
from requests.adapters import HTTPAdapter
from requests.packages.urllib3.util.retry import Retry
app = Flask(__name__)
WEATHER_API_URL = "https://api.example.com/weather"
def requests_retry_session(
retries=3,
backoff_factor=0.3,
status_forcelist=(500, 502, 504),
session=None,
):
session = session or requests.Session()
retry = Retry(
total=retries,
read=retries,
connect=retries,
backoff_factor=backoff_factor,
status_forcelist=status_forcelist,
)
adapter = HTTPAdapter(max_retries=retry)
session.mount("http://", adapter)
session.mount("https://", adapter)
return session
@app.route('/get_weather', methods=['GET'])
def get_weather():
city = request.args.get('city')
try:
response = requests_retry_session().get(WEATHER_API_URL, params={"city": city})
response.raise_for_status()
weather_data = response.json()
except requests.exceptions.RequestException as e:
return {"error": str(e)}, 500
return weather_data
In this example, Copilot's suggestions include setting up a retry session that allows the code to automatically retry requests if they fail due to specific status codes (500, 502, 504). The backoff_factor
gradually increases the delay between retries, helping avoid exceeding the API's rate limit further.