AttributeError: LineLogic instance has no attribute 'probe'

Cameron Simpson cs at
Tue Jul 28 03:44:28 CEST 2015

On 27Jul2015 13:43, John Gordon <gordon at> wrote:
>In <mailman.1024.1437982246.3674.python-list at> Abder-Rahman Ali <abder.rahman.ali at> writes:
>> In the class ---> LineLogic
>> def __init__(self):
>>       self.probe = vtk.vtkProbeFilter()
>> In another class ---> LineLogicTest
>> logic = LineLogic()
>> probe = logic.probe
>> data = probe.GetOutput().GetPointData().GetScalars()
>> When I try running the program, I get the following error:
>> AttributeError: LineLogic instance has no attribute 'probe'
>Since you haven't posted the actual complete code, we can only guess
>at the problem.
>My guess is that you have two different definitions of the LineLogic
>class, one of them lacking the probe attribute.

Alternatively, if the code he did quote is accurate, he may have not indented 
the definition of __init__. Example:

  class LineLogic(object):
      ''' doc string

  def __init__(self):

This is legal, but wrong. It will result in LineLogic having the default 
initialisation i.e. nothing, as the __init__ function is not part of the class.

But yes, this would all be clearer had the OP posted the code instead of a tiny 
out of context snippet.

Cameron Simpson <cs at>
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