did not match C++ signature

[Mo Shan]

Hi, I am trying to run the python examples in Ubuntu 16.04 with python 3.6 and boost version 1.58, but I have the following error, is there a fix to this?

File "testScenarioRunner.py", line 22, in test_loop_runner runner = gtsam.ScenarioRunner(gtsam.ScenarioPointer(scenario), params, dt) Boost.Python.ArgumentError: Python argument types in ScenarioRunner.init(ScenarioRunner, ConstantTwistScenario, PreintegrationParams, float) did not match C++ signature: init(_object, gtsam::Scenario const, boost::shared_ptr<gtsam::PreintegrationParams>, double, gtsam::imuBias::ConstantBias)

[Frank Dellaert]

Try to fix, look in gtsam.h, which directs creation of wrapper. Submit PR. Thanks !

[Mo Shan]

Hi, there's a similar issue but I am not sure whether it was resolved. Any advice?

https://bitbucket.org/gtborg/gtsam/pull-requests/258/fix-python_install/diff

[Frank Dellaert]

Ah, so, I think you're working with the old python wrapper. That relies on handwritten boost python code, not gtsam.h. We are not going to address any issues there ourselves, as the new cython-based wrapper is vastly more comprehensive. If you feel strongly about it, please figure out the wrapper and fix it in a PR. Otherwise, switch to the cython wrapper, try python ../cython/gtsam/examples/ImuFactorExample2.py. Note ScenarioRunner is unfortunately not yet supported as it uses pointers, might need to be refactored.

[Frank Dellaert]

Old python wrapper, will be deprecated

[Mo Shan]

I see, thanks for the info! I have tried the example, but there is an error, any suggestion?

Traceback (most recent call last): File "ImuFactorExample2.py", line 16, in <module> import gtsam.utils.plot as gtsam_plot ModuleNotFoundError: No module named 'gtsam.utils'

[Frank Dellaert]

Did you do all steps in cython README?

[Mo Shan]

I am reading it, thanks for the advice!