code: import stripe
  stripe.api_key = "sk_test_4eC39HqLyjWDarjtT1zdp7dc"
  
  stripe.CreditNote.modify(
    "cn_1LSdb92eZvKYlo2C0JdIQVHd",
    metadata={"order_id": "6735"},
  )
  '''Response {
    "id": "cn_1LSdb92eZvKYlo2C0JdIQVHd",
    "object": "credit_note",
    "amount": 857,
    "created": 1659517839,
    "currency": "usd",
    "customer": "cus_8TEMHVY5moxIPI",
    "customer_balance_transaction": null,
    "discount_amount": 0,
    "discount_amounts": [],
    "invoice": "in_1LSdb92eZvKYlo2CJvl4iJuW",
    "lines": {
      "object": "list",
      "data": [
        {
          "id": "cnli_1LSdb92eZvKYlo2Cu4lDIS7X",
          "object": "credit_note_line_item",
          "amount": 357,
          "amount_excluding_tax": 357,
          "description": "My First Invoice Item (created for API docs)",
          "discount_amount": 0,
          "discount_amounts": [],
          "invoice_line_item": "il_1LSdb92eZvKYlo2Cg5Kr2nEp",
          "livemode": false,
          "quantity": 1,
          "tax_amounts": [
            {
              "amount": 57,
              "inclusive": false,
              "tax_rate": "txr_1LSdb92eZvKYlo2CboQRs5G6"
            }
          ],
          "tax_rates": [
            {
              "id": "txr_1LSdb92eZvKYlo2CboQRs5G6",
              "object": "tax_rate",
              "active": true,
              "country": "DE",
              "created": 1659517839,
              "description": "VAT Germany",
              "display_name": "VAT",
              "inclusive": false,
              "jurisdiction": "DE",
              "livemode": false,
              "metadata": {},
              "percentage": 19.0,
              "state": null,
              "tax_type": "vat"
            }
          ],
          "type": "invoice_line_item",
          "unit_amount": null,
          "unit_amount_decimal": null,
          "unit_amount_excluding_tax": "357"
        },
        {
          "id": "cnli_1LSdb92eZvKYlo2C9yhKwMbp",
          "object": "credit_note_line_item",
          "amount": 500,
          "amount_excluding_tax": 500,
          "description": "Service credit",
          "discount_amount": 0,
          "discount_amounts": [],
          "livemode": false,
          "quantity": 1,
          "tax_amounts": [],
          "tax_rates": [],
          "type": "custom_line_item",
          "unit_amount": 500,
          "unit_amount_decimal": "500",
          "unit_amount_excluding_tax": "500"
        }
      ],
      "has_more": false,
      "url": "/v1/credit_notes/cn_1LSdb92eZvKYlo2C0JdIQVHd/lines"
    },
    "livemode": false,
    "memo": null,
    "metadata": {
      "order_id": "6735"
    },
    "number": "ABCD-1234-CN-01",
    "out_of_band_amount": null,
    "pdf": "https://pay.stripe.com/credit_notes/acct_1032D82eZvKYlo2C/cnst_123456789/pdf?s=ap",
    "reason": null,
    "refund": null,
    "status": "issued",
    "subtotal": 857,
    "subtotal_excluding_tax": 857,
    "tax_amounts": [
      {
        "amount": 57,
        "inclusive": false,
        "tax_rate": "txr_1LSdb92eZvKYlo2CboQRs5G6"
      }
    ],
    "total": 857,
    "total_excluding_tax": null,
    "type": "pre_payment",
    "voided_at": null
  }'''
nl: Update a credit noteUpdates an existing credit note.Parameters memo optional Credit note memo. metadata optional dictionary Set of key-value pairs that you can attach to an object. This can be useful for storing additional information about the object in a structured format. Individual keys can be unset by posting an empty value to them. All keys can be unset by posting an empty value to metadata.ReturnsReturns the updated credit note object if the call succeeded