old_contents: from decimal import Decimal
  
  from django.conf import settings
  from django.contrib.auth import get_user_model
  
  from go.config import billing_quantization_exponent
  
  SYSTEM_BILLER_NAME = getattr(
      settings, 'BILLING_SYSTEM_BILLER_NAME', 'Vumi')
  
  # 10 credits = 1 US cent
  CREDIT_CONVERSION_FACTOR = getattr(
      settings, 'BILLING_CREDIT_CONVERSION_FACTOR', Decimal('10.00'))
  
  ACCOUNT_FEE = getattr(
      settings, 'BILLING_ACCOUNT_FEE', Decimal('50.00'))
  
  # This is currently pulled in from `go.config` to avoid pulling a pile of
  # Django stuff into `go.vumitools.billing_worker` through `go.billing.utils`.
  QUANTIZATION_EXPONENT = billing_quantization_exponent()
  if hasattr(settings, 'BILLING_QUANTIZATION_EXPONENT'):
      raise ValueError(
          "BILLING_QUANTIZATION_EXPONENT cannot be configured in settings.py.")
  
  API_MIN_CONNECTIONS = getattr(settings, 'BILLING_API_MIN_CONNECTIONS', 10)
  
  ENDPOINT_DESCRIPTION_STRING = getattr(
      settings, 'BILLING_ENDPOINT_DESCRIPTION_STRING',
      "tcp:9090:interface=127.0.0.1")
  
  MONTHLY_STATEMENT_TITLE = getattr(
      settings, 'BILLING_MONTHLY_STATEMENT_TITLE', "Monthly Statement")
  
  STATEMENTS_PER_PAGE = getattr(
      settings, 'BILLING_STATEMENTS_PER_PAGE', 12)
  
  STATEMENTS_DEFAULT_ORDER_BY = getattr(
      settings, 'BILLING_STATEMENTS_DEFAULT_ORDER_BY', '-from_date')
  
  
  STATEMENT_CONTACT_DETAILS = {
      'tel': '27.11.482.8684',
      'email': 'http://accounts@praekelt.com',
      'website': 'www.praekeltfoundation.org',
  }
  
  
  def get_user_table():
      """Return the name of the table used by the user model."""
      user_model = get_user_model()
      return user_model._meta.db_table
  
  
  def get_connection_string():
      """Return the database connection string"""
      db = settings.DATABASES['default']
      if 'postgres' not in db['ENGINE']:
          raise ValueError("Billing API only supports PostGreSQL.")
      return "host='%s' dbname='%s' user='%s' password='%s'" \
          % (db.get('HOST', 'localhost'), db.get('NAME'), db.get('USER'),
             db.get('PASSWORD'))
  
new_contents: from decimal import Decimal
  
  from django.conf import settings
  from django.contrib.auth import get_user_model
  
  from go.config import billing_quantization_exponent
  
  SYSTEM_BILLER_NAME = getattr(
      settings, 'BILLING_SYSTEM_BILLER_NAME', 'Vumi')
  
  # 10 credits = 1 US cent
  CREDIT_CONVERSION_FACTOR = getattr(
      settings, 'BILLING_CREDIT_CONVERSION_FACTOR', Decimal('10.00'))
  
  ACCOUNT_FEE = getattr(
      settings, 'BILLING_ACCOUNT_FEE', Decimal('50.00'))
  
  # This is currently pulled in from `go.config` to avoid pulling a pile of
  # Django stuff into `go.vumitools.billing_worker` through `go.billing.utils`.
  QUANTIZATION_EXPONENT = billing_quantization_exponent()
  if hasattr(settings, 'BILLING_QUANTIZATION_EXPONENT'):
      raise ValueError(
          "BILLING_QUANTIZATION_EXPONENT cannot be configured in settings.py.")
  
  API_MIN_CONNECTIONS = getattr(settings, 'BILLING_API_MIN_CONNECTIONS', 10)
  
  ENDPOINT_DESCRIPTION_STRING = getattr(
      settings, 'BILLING_ENDPOINT_DESCRIPTION_STRING',
      "tcp:9090:interface=127.0.0.1")
  
  MONTHLY_STATEMENT_TITLE = getattr(
      settings, 'BILLING_MONTHLY_STATEMENT_TITLE', "Monthly Statement")
  
  STATEMENTS_PER_PAGE = getattr(
      settings, 'BILLING_STATEMENTS_PER_PAGE', 12)
  
  STATEMENTS_DEFAULT_ORDER_BY = getattr(
      settings, 'BILLING_STATEMENTS_DEFAULT_ORDER_BY', '-from_date')
  
  
  STATEMENT_CONTACT_DETAILS = getattr(
      settings, 'BILLING_STATEMENT_CONTACT_DETAILS', {
          'tel': '27.11.482.8684',
          'email': 'http://accounts@praekelt.com',
          'website': 'www.praekeltfoundation.org',
      })
  
  
  def get_user_table():
      """Return the name of the table used by the user model."""
      user_model = get_user_model()
      return user_model._meta.db_table
  
  
  def get_connection_string():
      """Return the database connection string"""
      db = settings.DATABASES['default']
      if 'postgres' not in db['ENGINE']:
          raise ValueError("Billing API only supports PostGreSQL.")
      return "host='%s' dbname='%s' user='%s' password='%s'" \
          % (db.get('HOST', 'localhost'), db.get('NAME'), db.get('USER'),
             db.get('PASSWORD'))
  
subject: Use getattr() trick for statement contact details billing setting