Wrap shared object in a class to control its loading (#2637)

* Wrap shared object in a class to control its loading

* Fix libwarpx attribute references

* Updated callbacks.py for updated libwarpx

* Removed the wx module plus other clean up

* Further revision of how to use the pywarpx module.

Now, _libwarpx should not be imported by external scripts except in special circumstances.

* Updated documentation

* Clean up end of line whitespace

* Added more wrapping routines plus some clean up

* Fixed use of pywarpx in two examples

* Fix for getistep

* Fixed for the EB Python interface

* Silence a warning for our wrapper

Co-authored-by: Axel Huebl <axel.huebl@plasma.ninja>

1 files changed, 4 insertions, 5 deletions

diff --git a/Examples/Tests/ParticleDataPython/PICMI_inputs_prev_pos_2d.py b/Examples/Tests/ParticleDataPython/PICMI_inputs_prev_pos_2d.py
index d8e37140f..d71aa3fea 100755
--- a/Examples/Tests/ParticleDataPython/PICMI_inputs_prev_pos_2d.py
+++ b/Examples/Tests/ParticleDataPython/PICMI_inputs_prev_pos_2d.py
@@ -3,6 +3,7 @@
 # --- Input file to test the saving of old particle positions
 
 import numpy as np
+import pywarpx
 from pywarpx import picmi
 
 constants = picmi.constants
@@ -109,12 +110,10 @@ sim.step(max_steps - 1)
 # exist
 ##########################
 
-from pywarpx import _libwarpx
+assert (pywarpx.get_particle_comp_index('electrons', 'prev_x') > 0)
+assert (pywarpx.get_particle_comp_index('electrons', 'prev_z') > 0)
 
-assert (_libwarpx.get_particle_comp_index('electrons', 'prev_x') > 0)
-assert (_libwarpx.get_particle_comp_index('electrons', 'prev_z') > 0)
-
-prev_z_vals = _libwarpx.get_particle_arrays(
+prev_z_vals = pywarpx.get_particle_arrays(
     'electrons', 'prev_z', 0
 )
 for z_vals in prev_z_vals: