text: #!/usr/bin/env python
  # Copyright 2021 Google LLC
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     https://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  """Retrieves the invoices issued last month for a given billing setup."""
  
  
  import argparse
  from datetime import date, timedelta
  import sys
  
  from google.ads.googleads.client import GoogleAdsClient
  from google.ads.googleads.errors import GoogleAdsException
  
  
  def main(client, customer_id, billing_setup_id):
      """The main method that creates all necessary entities for the example.
  
      Args:
          client: an initialized GoogleAdsClient instance.
          customer_id: a client customer ID.
          billing_setup_id: a billing setup ID.
      """
  
      # The last day of last month.
      last_month = date.today().replace(day=1) - timedelta(days=1)
      # [START get_invoices]
      # Issues a request to list invoices.
      response = client.get_service("InvoiceService").list_invoices(
          customer_id=customer_id,
          billing_setup=client.get_service("GoogleAdsService").billing_setup_path(
              customer_id, billing_setup_id
          ),
          # The year needs to be 2019 or later, per the docs:
          # https://developers.google.com/google-ads/api/docs/billing/invoice?hl=en#retrieving_invoices
          issue_year=str(last_month.year),
          issue_month=last_month.strftime("%B").upper(),
      )
      # [END get_invoices]
  
      # [START get_invoices_1]
      for invoice in response.invoices:
          print(
              f"""
  - Found the invoice {invoice.resource_name}
      ID (also known as Invoice Number): '{invoice.id}'
      Type: {invoice.type_}
      Billing setup ID: '{invoice.billing_setup}'
      Payments account ID (also known as Billing Account Number): '{invoice.payments_account_id}'
      Payments profile ID (also known as Billing ID): '{invoice.payments_profile_id}'
      Issue date (also known as Invoice Date): {invoice.issue_date}
      Due date: {invoice.due_date}
      Currency code: {invoice.currency_code}
      Service date range (inclusive): from {invoice.service_date_range.start_date} to {invoice.service_date_range.end_date}
      Adjustments:
          subtotal {_micros_to_currency(invoice.adjustments_subtotal_amount_micros)}
          tax {_micros_to_currency(invoice.adjustments_tax_amount_micros)}
          total {_micros_to_currency(invoice.adjustments_total_amount_micros)}
      Regulatory costs:
          subtotal {_micros_to_currency(invoice.regulatory_costs_subtotal_amount_micros)}
          tax {_micros_to_currency(invoice.regulatory_costs_tax_amount_micros)}
          total {_micros_to_currency(invoice.regulatory_costs_total_amount_micros)}
      Replaced invoices: {invoice.replaced_invoices.join(", ") if invoice.replaced_invoices else "none"}
      Amounts:
          subtotal {_micros_to_currency(invoice.subtotal_amount_micros)}
          tax {_micros_to_currency(invoice.tax_amount_micros)}
          total {_micros_to_currency(invoice.total_amount_micros)}
      Corrected invoice: {invoice.corrected_invoice or "none"}
      PDF URL: {invoice.pdf_url}
      Account budgets:
      """
          )
          for account_budget_summary in invoice.account_budget_summaries:
              print(
                  f"""
                    - Account budget '{account_budget_summary.account_budget}':
                        Name (also known as Account Budget): '{account_budget_summary.account_budget_name}'
                        Customer (also known as Account ID): '{account_budget_summary.customer}'
                        Customer descriptive name (also known as Account): '{account_budget_summary.customer_descriptive_name}'
                        Purchase order number (also known as Purchase Order): '{account_budget_summary.purchase_order_number}'
                        Billing activity date range (inclusive):
                          from #{account_budget_summary.billable_activity_date_range.start_date}
                          to #{account_budget_summary.billable_activity_date_range.end_date}
                        Amounts:
                          subtotal '{_micros_to_currency(account_budget_summary.subtotal_amount_micros)}'
                          tax '{_micros_to_currency(account_budget_summary.tax_amount_micros)}'
                          total '{_micros_to_currency(account_budget_summary.total_amount_micros)}'
                  """
              )
              # [END get_invoices_1]
  
  
  def _micros_to_currency(micros):
      return micros / 1000000.0 if micros is not None else None
  
  
  if __name__ == "__main__":
      # GoogleAdsClient will read the google-ads.yaml configuration file in the
      # home directory if none is specified.
      googleads_client = GoogleAdsClient.load_from_storage(version="v6")
  
      parser = argparse.ArgumentParser(
          description="Retrieves the invoices issued last month for a given billing setup."
      )
      # The following argument(s) should be provided to run the example.
      parser.add_argument(
          "-c",
          "--customer_id",
          type=str,
          required=True,
          help="The Google Ads customer ID.",
      )
      parser.add_argument(
          "-b",
          "--billing_setup_id",
          type=str,
          required=True,
          help="The billing setup ID.",
      )
      args = parser.parse_args()
  
      try:
          main(googleads_client, args.customer_id, args.billing_setup_id)
      except GoogleAdsException as ex:
          print(
              f'Request with ID "{ex.request_id}" failed with status '
              f'"{ex.error.code().name}" and includes the following errors:'
          )
          for error in ex.failure.errors:
              print(f'\tError with message "{error.message}".')
              if error.location:
                  for field_path_element in error.location.field_path_elements:
                      print(f"\t\tOn field: {field_path_element.field_name}")
          sys.exit(1)
  