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Python: useful error when initialize_warpx not called before creating ParticleContainerWrapper #5412

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Python: useful error when initialize_warpx not called before creating ParticleContainerWrapper #5412

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5050f2d
add useful error message when user forgets to call initialize_warpx i…
archermarx Oct 24, 2024
9023112
change wording
archermarx Oct 24, 2024
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9 changes: 8 additions & 1 deletion Python/pywarpx/particle_containers.py
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Original file line number Diff line number Diff line change
Expand Up @@ -26,7 +26,14 @@ def __init__(self, species_name):
self.name = species_name

# grab the desired particle container
mypc = libwarpx.warpx.multi_particle_container()
# if initialize_warpx() has not been called, libwarpx will not have a `warpx` attribute.
# We catch this error and provide the user with some useful information.
try:
mypc = libwarpx.warpx.multi_particle_container()
except AttributeError as e:
msg = "This may be caused by attempting to create a ParticleContainerWrapper before initialize_warpx has been called"
raise AttributeError(msg) from e

self.particle_container = mypc.get_particle_container_from_name(self.name)

def add_particles(
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