old_contents: from __future__ import absolute_import
  
  import datetime
  
  from graphql.language import ast
  
  from .scalars import Scalar
  
  try:
      import iso8601
  except:
      raise ImportError(
          "iso8601 package is required for DateTime Scalar.\n"
          "You can install it using: pip install iso8601."
      )
  
  
  class DateTime(Scalar):
      '''
      The `DateTime` scalar type represents a DateTime
      value as specified by
      [iso8601](https://en.wikipedia.org/wiki/ISO_8601).
      '''
  
      @staticmethod
      def serialize(dt):
          assert isinstance(dt, (datetime.datetime, datetime.date)), (
              'Received not compatible datetime "{}"'.format(repr(dt))
          )
          return dt.isoformat()
  
      @classmethod
      def parse_literal(cls, node):
          if isinstance(node, ast.StringValue):
              return cls.parse_value(node.value)
  
      @staticmethod
      def parse_value(value):
          return iso8601.parse_date(value)
  
  
  class Time(Scalar):
      '''
      The `Time` scalar type represents a Time value as
      specified by
      [iso8601](https://en.wikipedia.org/wiki/ISO_8601).
      '''
      epoch_date = '1970-01-01'
  
      @staticmethod
      def serialize(time):
          assert isinstance(time, datetime.time), (
              'Received not compatible time "{}"'.format(repr(time))
          )
          return time.isoformat()
  
      @classmethod
      def parse_literal(cls, node):
          if isinstance(node, ast.StringValue):
              return cls.parse_value(node.value)
  
      @classmethod
      def parse_value(cls, value):
          dt = iso8601.parse_date('{}T{}'.format(cls.epoch_time, value))
          return datetime.time(dt.hour, dt.minute, dt.second, dt.microsecond, dt.tzinfo)
  
new_contents: from __future__ import absolute_import
  
  import datetime
  
  from graphql.language import ast
  
  from .scalars import Scalar
  
  try:
      import iso8601
  except:
      raise ImportError(
          "iso8601 package is required for DateTime Scalar.\n"
          "You can install it using: pip install iso8601."
      )
  
  
  class DateTime(Scalar):
      '''
      The `DateTime` scalar type represents a DateTime
      value as specified by
      [iso8601](https://en.wikipedia.org/wiki/ISO_8601).
      '''
  
      @staticmethod
      def serialize(dt):
          assert isinstance(dt, (datetime.datetime, datetime.date)), (
              'Received not compatible datetime "{}"'.format(repr(dt))
          )
          return dt.isoformat()
  
      @classmethod
      def parse_literal(cls, node):
          if isinstance(node, ast.StringValue):
              return cls.parse_value(node.value)
  
      @staticmethod
      def parse_value(value):
          return iso8601.parse_date(value)
  
  
  class Time(Scalar):
      '''
      The `Time` scalar type represents a Time value as
      specified by
      [iso8601](https://en.wikipedia.org/wiki/ISO_8601).
      '''
      epoch_date = '1970-01-01'
  
      @staticmethod
      def serialize(time):
          assert isinstance(time, datetime.time), (
              'Received not compatible time "{}"'.format(repr(time))
          )
          return time.isoformat()
  
      @classmethod
      def parse_literal(cls, node):
          if isinstance(node, ast.StringValue):
              return cls.parse_value(node.value)
  
      @classmethod
      def parse_value(cls, value):
          dt = iso8601.parse_date('{}T{}'.format(cls.epoch_date, value))
          return datetime.time(dt.hour, dt.minute, dt.second, dt.microsecond, dt.tzinfo)
  
subject: add time query test