code: import stripe
  stripe.api_key = "sk_test_your_key"
  
  stripe.SubscriptionItem.retrieve(
    "si_MAzroazQBGguLd",
  )
  '''Response {
    "id": "si_MAzroazQBGguLd",
    "object": "subscription_item",
    "billing_thresholds": null,
    "created": 1659518859,
    "metadata": {},
    "price": {
      "id": "price_1LSTX02eZvKYlo2CrKMGl6Dy",
      "object": "price",
      "active": true,
      "billing_scheme": "per_unit",
      "created": 1659479142,
      "currency": "usd",
      "custom_unit_amount": null,
      "livemode": false,
      "lookup_key": null,
      "metadata": {},
      "nickname": null,
      "product": "prod_MApBpixJvIPdF1",
      "recurring": {
        "aggregate_usage": null,
        "interval": "month",
        "interval_count": 1,
        "usage_type": "licensed"
      },
      "tax_behavior": "unspecified",
      "tiers_mode": null,
      "transform_quantity": null,
      "type": "recurring",
      "unit_amount": 1200,
      "unit_amount_decimal": "1200"
    },
    "quantity": 1,
    "subscription": "sub_1LSdra2eZvKYlo2CbANuqqoc",
    "tax_rates": []
  }'''
nl: Retrieve a subscription itemRetrieves the subscription item with the given ID.ParametersNo parameters.ReturnsReturns a subscription item if a valid subscription item ID was provided. Raises an error otherwise