text: import os
  
  
  class Constants:
      base_url = "https://cdn-api.co-vin.in/api/v2"
  
      states_list_url = f"{base_url}/admin/location/states"
      districts_list_url = f"{base_url}/admin/location/districts"
  
      availability_by_pin_code_url = f"{base_url}/appointment/sessions/public/calendarByPin"
      availability_by_district_url = f"{base_url}/appointment/sessions/public/calendarByDistrict"
  
      centers_by_lat_long = f"{base_url}/appointment/centers/public/findByLatLong"
  
      DD_MM_YYYY = "%d-%m-%Y"
  
      default_filters = {
          'min_age_limit': 18,
          'fee_type': ['Free', 'Paid'],
          'vaccine': ['COVISHIELD', 'COVAXIN', 'Sputnik V'],
          'available_capacity': 0,
          'available_capacity_dose1': 0,
          'available_capacity_dose2': 0
      }
  
      tests_data_dir = os.path.join('tests', 'data')
  