data from vtk to python
So this should be a fast question to answer. I am parsing a *vtk file with a python script.
In this line I obtain a certain field like temperature:
field = vtk_to_numpy(data.GetPointData().GetArray("Temperature"))
straight after i want to obtain another field like nodal conductivity:
kappa = vtk_to_numpy(data.GetPointData().GetArray("Heat.conductivity"))
everything works ok for the temperature field, but for the conductivity field i get the following message:
kappa = vtk_to_numpy(data.GetPointData().GetArray("Heat.conductivity"))
File "~anaconda3/lib/python3.6/site-packages/vtk/util/numpy_support.py", line 215, in vtk_to_numpy
typ = vtk_array.GetDataType()
AttributeError: 'NoneType' object has no attribute 'GetDataType'
Can someone explain why it works for the temperature field, and not for the conductivity?
python vtk
asked Nov 21 '18 at 20:03
Andres ValdezAndres Valdez
537
add a comment |
So this should be a fast question to answer. I am parsing a *vtk file with a python script.
In this line I obtain a certain field like temperature:
field = vtk_to_numpy(data.GetPointData().GetArray("Temperature"))
straight after i want to obtain another field like nodal conductivity:
kappa = vtk_to_numpy(data.GetPointData().GetArray("Heat.conductivity"))
everything works ok for the temperature field, but for the conductivity field i get the following message:
kappa = vtk_to_numpy(data.GetPointData().GetArray("Heat.conductivity"))
File "~anaconda3/lib/python3.6/site-packages/vtk/util/numpy_support.py", line 215, in vtk_to_numpy
typ = vtk_array.GetDataType()
AttributeError: 'NoneType' object has no attribute 'GetDataType'
Can someone explain why it works for the temperature field, and not for the conductivity?
python vtk
asked Nov 21 '18 at 20:03
Andres ValdezAndres Valdez
537
The fact that it's saying aNoneTypeis being operated on makes me think that it's exiting out of one of the Get functions early. Are you sure "Heat.conductivity" is the right name of the field? I would check withGetNumberOfArrays()andGetArrayNameto make sure the fields you expect to see actually exist.
– ahota
Nov 21 '18 at 21:58
The field Heat.conductivity is included in the *.vtk file. is there any way to say "get fields number one and two"????? @ahota
– Andres Valdez
Nov 22 '18 at 16:50
Yes, there's also aGetArraysignature that takes an integer index: vtk.org/doc/nightly/html/…. It says it's not recommended (they prefer the polymorphic version), but it's still worth a try.
– ahota
Nov 22 '18 at 16:55
add a comment |
So this should be a fast question to answer. I am parsing a *vtk file with a python script.
In this line I obtain a certain field like temperature:
field = vtk_to_numpy(data.GetPointData().GetArray("Temperature"))
straight after i want to obtain another field like nodal conductivity:
kappa = vtk_to_numpy(data.GetPointData().GetArray("Heat.conductivity"))
everything works ok for the temperature field, but for the conductivity field i get the following message:
kappa = vtk_to_numpy(data.GetPointData().GetArray("Heat.conductivity"))
File "~anaconda3/lib/python3.6/site-packages/vtk/util/numpy_support.py", line 215, in vtk_to_numpy
typ = vtk_array.GetDataType()
AttributeError: 'NoneType' object has no attribute 'GetDataType'
Can someone explain why it works for the temperature field, and not for the conductivity?
python vtk
asked Nov 21 '18 at 20:03
Andres ValdezAndres Valdez
537
So this should be a fast question to answer. I am parsing a *vtk file with a python script.
In this line I obtain a certain field like temperature:
field = vtk_to_numpy(data.GetPointData().GetArray("Temperature"))
straight after i want to obtain another field like nodal conductivity:
kappa = vtk_to_numpy(data.GetPointData().GetArray("Heat.conductivity"))
everything works ok for the temperature field, but for the conductivity field i get the following message:
kappa = vtk_to_numpy(data.GetPointData().GetArray("Heat.conductivity"))
File "~anaconda3/lib/python3.6/site-packages/vtk/util/numpy_support.py", line 215, in vtk_to_numpy
typ = vtk_array.GetDataType()
AttributeError: 'NoneType' object has no attribute 'GetDataType'
Can someone explain why it works for the temperature field, and not for the conductivity?
python vtk
python vtk
asked Nov 21 '18 at 20:03
Andres ValdezAndres Valdez
537
asked Nov 21 '18 at 20:03
Andres ValdezAndres Valdez
537
asked Nov 21 '18 at 20:03
Andres ValdezAndres Valdez
537
asked Nov 21 '18 at 20:03
Andres ValdezAndres Valdez
537
asked Nov 21 '18 at 20:03
Andres ValdezAndres Valdez
537
537
The fact that it's saying aNoneTypeis being operated on makes me think that it's exiting out of one of the Get functions early. Are you sure "Heat.conductivity" is the right name of the field? I would check withGetNumberOfArrays()andGetArrayNameto make sure the fields you expect to see actually exist.
– ahota
Nov 21 '18 at 21:58
The field Heat.conductivity is included in the *.vtk file. is there any way to say "get fields number one and two"????? @ahota
– Andres Valdez
Nov 22 '18 at 16:50
Yes, there's also aGetArraysignature that takes an integer index: vtk.org/doc/nightly/html/…. It says it's not recommended (they prefer the polymorphic version), but it's still worth a try.
– ahota
Nov 22 '18 at 16:55
add a comment |
The fact that it's saying aNoneTypeis being operated on makes me think that it's exiting out of one of the Get functions early. Are you sure "Heat.conductivity" is the right name of the field? I would check withGetNumberOfArrays()andGetArrayNameto make sure the fields you expect to see actually exist.
– ahota
Nov 21 '18 at 21:58
The field Heat.conductivity is included in the *.vtk file. is there any way to say "get fields number one and two"????? @ahota
– Andres Valdez
Nov 22 '18 at 16:50
Yes, there's also aGetArraysignature that takes an integer index: vtk.org/doc/nightly/html/…. It says it's not recommended (they prefer the polymorphic version), but it's still worth a try.
– ahota
Nov 22 '18 at 16:55
The fact that it's saying a
NoneType is being operated on makes me think that it's exiting out of one of the Get functions early. Are you sure "Heat.conductivity" is the right name of the field? I would check with GetNumberOfArrays() and GetArrayName to make sure the fields you expect to see actually exist.– ahota
Nov 21 '18 at 21:58
The fact that it's saying a
NoneType is being operated on makes me think that it's exiting out of one of the Get functions early. Are you sure "Heat.conductivity" is the right name of the field? I would check with GetNumberOfArrays() and GetArrayName to make sure the fields you expect to see actually exist.– ahota
Nov 21 '18 at 21:58
The field Heat.conductivity is included in the *.vtk file. is there any way to say "get fields number one and two"????? @ahota
– Andres Valdez
Nov 22 '18 at 16:50
The field Heat.conductivity is included in the *.vtk file. is there any way to say "get fields number one and two"????? @ahota
– Andres Valdez
Nov 22 '18 at 16:50
Yes, there's also a
GetArray signature that takes an integer index: vtk.org/doc/nightly/html/…. It says it's not recommended (they prefer the polymorphic version), but it's still worth a try.– ahota
Nov 22 '18 at 16:55
Yes, there's also a
GetArray signature that takes an integer index: vtk.org/doc/nightly/html/…. It says it's not recommended (they prefer the polymorphic version), but it's still worth a try.– ahota
Nov 22 '18 at 16:55
add a comment |
1 Answer
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So after surfing on the web I found he next flag I was supposed to turn on while reading the *.vtk file,
reader.ReadAllScalarsOn()
Now everything works as planned.
answered Nov 23 '18 at 21:11
Andres ValdezAndres Valdez
537
add a comment |
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1 Answer
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So after surfing on the web I found he next flag I was supposed to turn on while reading the *.vtk file,
reader.ReadAllScalarsOn()
Now everything works as planned.
answered Nov 23 '18 at 21:11
Andres ValdezAndres Valdez
537
add a comment |
So after surfing on the web I found he next flag I was supposed to turn on while reading the *.vtk file,
reader.ReadAllScalarsOn()
Now everything works as planned.
answered Nov 23 '18 at 21:11
Andres ValdezAndres Valdez
537
add a comment |
So after surfing on the web I found he next flag I was supposed to turn on while reading the *.vtk file,
reader.ReadAllScalarsOn()
Now everything works as planned.
answered Nov 23 '18 at 21:11
Andres ValdezAndres Valdez
537
So after surfing on the web I found he next flag I was supposed to turn on while reading the *.vtk file,
reader.ReadAllScalarsOn()
Now everything works as planned.
answered Nov 23 '18 at 21:11
Andres ValdezAndres Valdez
537
answered Nov 23 '18 at 21:11
Andres ValdezAndres Valdez
537
answered Nov 23 '18 at 21:11
Andres ValdezAndres Valdez
537
answered Nov 23 '18 at 21:11
Andres ValdezAndres Valdez
537
537
add a comment |
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The fact that it's saying a
NoneTypeis being operated on makes me think that it's exiting out of one of the Get functions early. Are you sure "Heat.conductivity" is the right name of the field? I would check withGetNumberOfArrays()andGetArrayNameto make sure the fields you expect to see actually exist.– ahota
Nov 21 '18 at 21:58
The field Heat.conductivity is included in the *.vtk file. is there any way to say "get fields number one and two"????? @ahota
– Andres Valdez
Nov 22 '18 at 16:50
Yes, there's also a
GetArraysignature that takes an integer index: vtk.org/doc/nightly/html/…. It says it's not recommended (they prefer the polymorphic version), but it's still worth a try.– ahota
Nov 22 '18 at 16:55