Question #250783 on Yade changed: https://answers.launchpad.net/yade/+question/250783
Jan Stránský proposed the following answer: Hello Fu, > > (2). The second question is about using ‘PyRunner’ to output some > important simulation data for post process. The general use of ‘PyRunner’ > in ‘O.engines’is just like that > > > #################################################################################### > output_unit_step = constant int > ... > PyRunner(command='postprocess()', iterPeriod = output_unit_step) > > #################################################################################### > > Now, I expect that ‘output_unit_step’ can be changed by stages in whole > process of simulation and the key factor of determining these different > stages is the ‘O.iter’. So the codes above can be modified as: > > > #################################################################################### > if O.iter <= certain stage range 1 : > output_unit_steps = constant int 1 > elif certain stage range 1 < O.iter <= certain stage range 2: > output_unit_steps = constant int 2 > ..... > PyRunner(command='postprocess()', iterPeriod = output_unit_step) > > #################################################################################### > > I hoped ‘iterPeriod’ in ‘PyRunner’ can be updated in accordance with the > variable ‘output_unit_steps’ but failed. The invariable ‘iterPeriod’ is > always equal to ‘constant int 1’. This is because at the beginning of > simulation, ‘O.iter = 0’ and the ‘if’ condition is ‘True’. > ‘output_unit_steps’ is assigned by ‘constant int 1’ and may not be changed > any more in the whole process. I wish there are some other codes can > replace my codes above to achieve my purpose. Please tell me these. > use label for the PyRunner O.engines = [ ... PyRunner(command='postprocess()', iterPeriod = output_unit_step, label='postprocessorEngine') ] and change its iterPeriod after certain number of time steps using this label: O.run(certain stage range 1,True) postprocessorEngine.iterPeriod = whatever # [1] HTH Jan [1] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.PyRunner -- You received this question notification because you are a member of yade-users, which is an answer contact for Yade. _______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : [email protected] Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
