old_contents: #!/usr/bin/python2.4
  #
  # Copyright 2008 Google Inc.
  #
  # 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
  #
  #      http://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.
  
  """Backend which can generate charts using the Google Chart API."""
  
  from graphy import line_chart
  from graphy import bar_chart
  from graphy import pie_chart
  from graphy.backends.google_chart_api import encoders
  
  def _GetChartFactory(chart_class, display_class):
    """Create a factory method for instantiating charts with displays.
  
    Returns a method which, when called, will create & return a chart with
    chart.display already populated.
    """
    def Inner(*args, **kwargs):
      chart = chart_class(*args, **kwargs)
      chart.display = display_class(chart)
      return chart
    return Inner
  
  # These helper methods make it easy to get chart objects with display
  # objects already setup.  For example, this:
  #   chart = google_chart_api.LineChart()
  # is equivalent to:
  #   chart = line_chart.LineChart()
  #   chart.display = google_chart_api.LineChartEncoder()
  #
  # (If there's some chart type for which a helper method isn't available, you
  # can always just instantiate the correct encoder manually, like in the 2nd
  # example above).
  # TODO: fix these so they have nice docs in ipython (give them __doc__)
  LineChart = _GetChartFactory(line_chart.LineChart, encoders.LineChartEncoder)
  Sparkline = _GetChartFactory(line_chart.Sparkline, encoders.SparklineEncoder)
  BarChart  = _GetChartFactory(bar_chart.BarChart, encoders.BarChartEncoder)
  PieChart  = _GetChartFactory(pie_chart.PieChart, encoders.PieChartEncoder)
  
new_contents: #!/usr/bin/python2.4
  #
  # Copyright 2008 Google Inc.
  #
  # 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
  #
  #      http://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.
  
  """Backend which can generate charts using the Google Chart API."""
  
  from graphy import line_chart
  from graphy import bar_chart
  from graphy import pie_chart
  from graphy.backends.google_chart_api import encoders
  
  def _GetChartFactory(chart_class, display_class):
    """Create a factory method for instantiating charts with displays.
  
    Returns a method which, when called, will create & return a chart with
    chart.display already populated.
    """
    def Inner(*args, **kwargs):
      chart = chart_class(*args, **kwargs)
      chart.display = display_class(chart)
      return chart
    return Inner
  
  # These helper methods make it easy to get chart objects with display
  # objects already setup.  For example, this:
  #   chart = google_chart_api.LineChart()
  # is equivalent to:
  #   chart = line_chart.LineChart()
  #   chart.display = google_chart_api.encoders.LineChartEncoder(chart)
  #
  # (If there's some chart type for which a helper method isn't available, you
  # can always just instantiate the correct encoder manually, like in the 2nd
  # example above).
  # TODO: fix these so they have nice docs in ipython (give them __doc__)
  LineChart = _GetChartFactory(line_chart.LineChart, encoders.LineChartEncoder)
  Sparkline = _GetChartFactory(line_chart.Sparkline, encoders.SparklineEncoder)
  BarChart  = _GetChartFactory(bar_chart.BarChart, encoders.BarChartEncoder)
  PieChart  = _GetChartFactory(pie_chart.PieChart, encoders.PieChartEncoder)
  
subject: fix example in comment