# Time Varying with Python Programmable Source

**URL:** https://discourse.paraview.org/t/time-varying-with-python-programmable-source/6029
**Category:** ParaView Support
**Created:** [December 10, 2020, 6:31pm UTC](https://discourse.paraview.org/t/time-varying-with-python-programmable-source/6029 "2020-12-10T18:31:51Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![stevenrend](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/s/b487fb/32.png) [@stevenrend](https://discourse.paraview.org/u/stevenrend)
#### Post date: [December 10, 2020, 6:31pm UTC](https://discourse.paraview.org/t/time-varying-with-python-programmable-source/6029/1 "2020-12-10T18:31:51Z")

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Dear all,

I want to display Time Varying data in Paraview as explained in : [https://www.paraview.org/Wiki/ParaView/Simple\_ParaView\_3\_Python\_Filters#Producing\_Data\_with\_Timesteps\_.28Source.29](https://www.paraview.org/Wiki/ParaView/Simple_ParaView_3_Python_Filters#Producing_Data_with_Timesteps_.28Source.29)

The problem I am encountering is that the time is not being updated (it remains equal to 0) at each time step. What I am missing ?  
Also in the example I am reading there was the line : output = self.GetOutput() that I commented because it made Paraview crash. Is this line necessary ? (Sorry for the naive question but it’s the first time I am handling with Python Programmable Sources).

In below link there are three of my input files (001.data.h5, 002.data.h5 and 003.data.h5) and the python script : pvCylindrical.py :

> **[Paraview\_tests](https://nuage.osupytheas.fr/s/y3LAaL3KqsAb97R)**
>
> Nuage - le Nuage de l'OSU Pytheas

Thank you in advance,  
Steven

P-S : pvCylindrical.py comes from the solved topic : [Convert hdf5 files to a Paraview readable format](https://discourse.paraview.org/t/convert-hdf5-files-to-a-paraview-readable-format/6004) . I modified it in order to display time varying data.

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### Author: ![stevenrend](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/s/b487fb/32.png) [@stevenrend](https://discourse.paraview.org/u/stevenrend)
#### Post date: [March 9, 2021, 12:27pm UTC](https://discourse.paraview.org/t/time-varying-with-python-programmable-source/6029/2 "2021-03-09T12:27:30Z")

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Hello everyone,

I partially solved my problem and I provide you here the code, some test files and a short video : [Nuage](https://nuage.osupytheas.fr/s/j7CL7Kr7RzRWmJs)

What I don’t understand is why the first time step is not updated ? I am always forced to do the procedure that I show in the video of commenting and uncommenting some lines …  
So if someone can explain to me, please, how I can update the first time step without resorting to the procedure I do, I will be very grateful.

Thank you in advance,  
Steven