old_contents: __all__ = [
      'EarthSource',
  ]
  
  import vtk
  # Import Helpers:
  from ..base import AlgorithmBase
  from .. import _helpers
  
  
  class EarthSource(AlgorithmBase):
      """A simple data source to produce a ``vtkEarthSource``
      """
      __displayname__ = 'GSLib Table Reader'
      __category__ = 'source'
      def __init__(self, radius=6371.0):
          AlgorithmBase.__init__(self,
              nInputPorts=0,
              nOutputPorts=1, outputType='vtkPolyData')
          self.__radius = radius
  
      def RequestData(self, request, inInfo, outInfo):
          pdo = self.GetOutputData(outInfo, 0)
          earth = vtk.vtkEarthSource()
          earth.SetRadius(self.__radius)
          earth.OutlineOn()
          earth.Update()
          pdo.ShallowCopy(earth.GetOutput())
          return 1
  
      def SetRadius(self, radius):
          if self.__radius != radius:
              self.__radius = radius
              self.Modified()
  
new_contents: __all__ = [
      'EarthSource',
  ]
  
  import vtk
  # Import Helpers:
  from ..base import AlgorithmBase
  from .. import _helpers
  
  
  class EarthSource(AlgorithmBase):
      """A simple data source to produce a ``vtkEarthSource``
      """
      __displayname__ = 'Earth Source'
      __category__ = 'source'
      def __init__(self, radius=6371.0):
          AlgorithmBase.__init__(self,
              nInputPorts=0,
              nOutputPorts=1, outputType='vtkPolyData')
          self.__radius = radius
  
      def RequestData(self, request, inInfo, outInfo):
          pdo = self.GetOutputData(outInfo, 0)
          earth = vtk.vtkEarthSource()
          earth.SetRadius(self.__radius)
          earth.OutlineOn()
          earth.Update()
          pdo.ShallowCopy(earth.GetOutput())
          return 1
  
      def SetRadius(self, radius):
          if self.__radius != radius:
              self.__radius = radius
              self.Modified()
  
subject: Fix typo