old_contents: from __future__ import (absolute_import, division, print_function,
                          unicode_literals)
  
  from copy import deepcopy
  from ..utils.exceptions import GgplotError
  
  
  class labs(object):
      """
      General class for all label adding classes
      """
      labels = {}
  
      def __init__(self, *args, **kwargs):
          if args and not isinstance(args, dict):
              raise GgplotError(
                  "'labs' excepts either a dictionary as",
                  "an argument or keyword arguments")
              self.labels = args
          else:
              self.labels = kwargs
  
      def __radd__(self, gg):
          gg = deepcopy(gg)
          gg.labels.update(self.labels)
          return gg
  
  
  class xlab(labs):
      """
      Create x-axis label
      """
  
      def __init__(self, xlab):
          if xlab is None:
              raise GgplotError("Arguments to",
                                self.__class__.__name__,
                                "cannot be None")
          self.labels = {'x': xlab}
  
  
  class ylab(labs):
      """
      Create y-axis label
      """
  
      def __init__(self, ylab):
          if ylab is None:
              raise GgplotError("Arguments to",
                                self.__class__.__name__,
                                "cannot be None")
          self.labels = {'y': ylab}
  
  
  class ggtitle(labs):
      """
      Create plot title
      """
      def __init__(self, title):
          if title is None:
              raise GgplotError("Arguments to",
                                self.__class__.__name__,
                                "cannot be None")
          self.label = {'title': title}
  
new_contents: from __future__ import (absolute_import, division, print_function,
                          unicode_literals)
  
  from copy import deepcopy
  from ..utils.exceptions import GgplotError
  
  
  class labs(object):
      """
      General class for all label adding classes
      """
      labels = {}
  
      def __init__(self, *args, **kwargs):
          if args and not isinstance(args, dict):
              raise GgplotError(
                  "'labs' excepts either a dictionary as",
                  "an argument or keyword arguments")
              self.labels = args
          else:
              self.labels = kwargs
  
      def __radd__(self, gg):
          gg = deepcopy(gg)
          gg.labels.update(self.labels)
          return gg
  
  
  class xlab(labs):
      """
      Create x-axis label
      """
  
      def __init__(self, xlab):
          if xlab is None:
              raise GgplotError("Arguments to",
                                self.__class__.__name__,
                                "cannot be None")
          self.labels = {'x': xlab}
  
  
  class ylab(labs):
      """
      Create y-axis label
      """
  
      def __init__(self, ylab):
          if ylab is None:
              raise GgplotError("Arguments to",
                                self.__class__.__name__,
                                "cannot be None")
          self.labels = {'y': ylab}
  
  
  class ggtitle(labs):
      """
      Create plot title
      """
      def __init__(self, title):
          if title is None:
              raise GgplotError("Arguments to",
                                self.__class__.__name__,
                                "cannot be None")
          self.labels = {'title': title}
  
subject: Fix plot title not showing up