old_contents: import datetime
  import decimal
  
  from django.core.exceptions import ImproperlyConfigured
  from django.utils import importlib, timezone
  
  
  def convert_tstamp(response, field_name=None):
      try:
          if field_name and response[field_name]:
              return datetime.datetime.fromtimestamp(
                  response[field_name],
                  timezone.utc
              )
          if not field_name:
              return datetime.datetime.fromtimestamp(
                  response,
                  timezone.utc
              )
      except KeyError:
          pass
      return None
  
  
  def get_user_model():  # pragma: no cover
      try:
          # pylint: disable=E0611
          from django.contrib.auth import get_user_model as django_get_user_model
          return django_get_user_model()
      except ImportError:
          from django.contrib.auth.models import User
          return User
  
  
  def load_path_attr(path):  # pragma: no cover
      i = path.rfind(".")
      module, attr = path[:i], path[i + 1:]
      try:
          mod = importlib.import_module(module)
      except ImportError as e:
          raise ImproperlyConfigured("Error importing {0}: '{1}'".format(module, e))
      try:
          attr = getattr(mod, attr)
      except AttributeError:
          raise ImproperlyConfigured(
              "Module '{0}' does not define a '{1}'".format(
                  module,
                  attr
              )
          )
      return attr
  
  
  # currencies those amount=1 means 100 cents
  # https://support.stripe.com/questions/which-zero-decimal-currencies-does-stripe-support
  ZERO_DECIMAL_CURRENCIES = [
      "bif", "clp", "djf", "gnf", "jpy", "kmf", "krw",
      "mga", "pyg", "rwf", "vuv", "xaf", "xof", "xpf",
  ]
  
  
  def convert_amount_for_db(amount, currency="usd"):
      return (amount / decimal.Decimal("100")) if currency.lower() not in ZERO_DECIMAL_CURRENCIES else decimal.Decimal(amount)
  
  
  def convert_amount_for_api(amount, currency="usd"):
      return int(amount * 100) if currency.lower() not in ZERO_DECIMAL_CURRENCIES else int(amount)
  
new_contents: import datetime
  import decimal
  import importlib
  
  from django.core.exceptions import ImproperlyConfigured
  from django.utils import timezone
  
  
  def convert_tstamp(response, field_name=None):
      try:
          if field_name and response[field_name]:
              return datetime.datetime.fromtimestamp(
                  response[field_name],
                  timezone.utc
              )
          if not field_name:
              return datetime.datetime.fromtimestamp(
                  response,
                  timezone.utc
              )
      except KeyError:
          pass
      return None
  
  
  def get_user_model():  # pragma: no cover
      try:
          # pylint: disable=E0611
          from django.contrib.auth import get_user_model as django_get_user_model
          return django_get_user_model()
      except ImportError:
          from django.contrib.auth.models import User
          return User
  
  
  def load_path_attr(path):  # pragma: no cover
      i = path.rfind(".")
      module, attr = path[:i], path[i + 1:]
      try:
          mod = importlib.import_module(module)
      except ImportError as e:
          raise ImproperlyConfigured("Error importing {0}: '{1}'".format(module, e))
      try:
          attr = getattr(mod, attr)
      except AttributeError:
          raise ImproperlyConfigured(
              "Module '{0}' does not define a '{1}'".format(
                  module,
                  attr
              )
          )
      return attr
  
  
  # currencies those amount=1 means 100 cents
  # https://support.stripe.com/questions/which-zero-decimal-currencies-does-stripe-support
  ZERO_DECIMAL_CURRENCIES = [
      "bif", "clp", "djf", "gnf", "jpy", "kmf", "krw",
      "mga", "pyg", "rwf", "vuv", "xaf", "xof", "xpf",
  ]
  
  
  def convert_amount_for_db(amount, currency="usd"):
      return (amount / decimal.Decimal("100")) if currency.lower() not in ZERO_DECIMAL_CURRENCIES else decimal.Decimal(amount)
  
  
  def convert_amount_for_api(amount, currency="usd"):
      return int(amount * 100) if currency.lower() not in ZERO_DECIMAL_CURRENCIES else int(amount)
  
subject: Use importlib from standard library