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Catch warpx not being initialized in library loader #5567

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Catch warpx not being initialized in library loader #5567

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9 changes: 6 additions & 3 deletions Python/pywarpx/_libwarpx.py
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Original file line number Diff line number Diff line change
Expand Up @@ -40,9 +40,14 @@ def __getattr__(self, attribute):
# Once loaded, it gets added to the dictionary so this code won't be called again.
self.load_library()
return self.__dict__[attribute]
elif attribute == "warpx":
# A `warpx` attribute has not yet been assigned, so `initialize_warpx` has not been called.
raise AttributeError(
"Trying to access libwarpx.warpx before initialize_warpx has been called!"
)
else:
# For any other attribute, call the built-in routine - this should always
# return an AttributeException.
# return an AttributeError.
return self.__getattribute__(attribute)

def _get_package_root(self):
Expand Down Expand Up @@ -143,8 +148,6 @@ def initialize(self, argv=None, mpi_comm=None):
self.libwarpx_so.execute_python_callback("afterinit")
self.libwarpx_so.execute_python_callback("particleloader")

# self.libwarpx_so.warpx_init()

self.initialized = True

def finalize(self, finalize_mpi=1):
Expand Down
4 changes: 2 additions & 2 deletions Python/pywarpx/particle_containers.py
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Original file line number Diff line number Diff line change
Expand Up @@ -35,7 +35,7 @@ def particle_container(self):
self.name
)
except AttributeError as e:
msg = "This is likely caused by attempting to access a ParticleContainerWrapper before initialize_warpx has been called"
msg = "You must initialize WarpX before accessing a ParticleContainerWrapper's particle_container."
raise AttributeError(msg) from e

return self._particle_container
Expand Down Expand Up @@ -777,7 +777,7 @@ def particle_buffer(self):
try:
self._particle_buffer = libwarpx.warpx.get_particle_boundary_buffer()
except AttributeError as e:
msg = "This is likely caused by attempting to access a ParticleBoundaryBufferWrapper before initialize_warpx has been called"
msg = "You must initialize WarpX before accessing a ParticleBoundaryBufferWrapper's particle_buffer."
raise AttributeError(msg) from e

return self._particle_buffer
Expand Down
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