[Paraview] hidden python methods??

[David Fuentes]

working through one of the examples on the wiki

http://paraview.org/Wiki/ParaView/Python_Scripting#Animating


   reader = sources.ExodusIIReader(“.../can.ex2”)
     .
     .
     .
   reader.UpdatePipelineInformation()

However

   dir(reader)


does Not return a method by the name of "UpdatePipelineInformation"
However, the call still works??

How are you able to call a method that is not returned by dir()?
Are there any python debuggers available that will let you step
into the function reader.UpdatePipelineInformation()
to see what is actually being called?






thank you,
df