cdsapi

import cdsapi import os # Your CDS API Key and URL are required for authentication. # These are typically stored in a file ~/.cdsapirc or as environment variables. # For this quickstart, we simulate fetching from environment variables. # In a real setup, ensure CDSAPI_URL and CDSAPI_KEY are properly configured. # Example: # export CDSAPI_URL="https://cds.climate.copernicus.eu/api/v2" # export CDSAPI_KEY="YOUR_UID:YOUR_API_KEY" cds_url = os.environ.get('CDSAPI_URL', 'https://cds.climate.copernicus.eu/api/v2') cds_key = os.environ.get('CDSAPI_KEY', '12345:some-dummy-key-for-test-validation') if 'some-dummy-key' in cds_key: print("WARNING: CDSAPI_URL and CDSAPI_KEY environment variables are not set, " "or ~/.cdsapirc is missing. This code will likely fail without proper credentials.") try: # Initialize the client. It will automatically look for .cdsapirc or environment variables. # Explicitly passing url/key is also an option. c = cdsapi.Client(url=cds_url, key=cds_key) print("Attempting to retrieve 2m temperature for Jan 1, 2023, 12:00 from ERA5 single levels...") c.retrieve( 'reanalysis-era5-single-levels', { 'product_type': 'reanalysis', 'variable': '2m_temperature', 'year': '2023', 'month': '01', 'day': '01', 'time': '12:00', 'format': 'grib', 'area': '50/-10/40/0' # N/W/S/E, e.g., for a small area over UK/France }, 'era5-2m-temperature-2023-01-01-subset.grib' # Output filename ) print("Retrieval request sent. Check for 'era5-2m-temperature-2023-01-01-subset.grib' file.") except Exception as e: print(f"An error occurred during data retrieval: {e}") print("Please ensure your CDS API credentials are correctly configured in ~/.cdsapirc or as environment variables.")