<filename>plasmapy/plasma/sources/__init__.py
from plasmapy.plasma.sources.openpmd_hdf5 import HDF5Reader
from plasmapy.plasma.sources.plasma3d import Plasma3D
from plasmapy.plasma.sources.plasmablob import PlasmaBlob

<filename>plasmapy/plasma/sources/__init__.py
from plasmapy.plasma.sources.openpmd_hdf5 import HDF5Reader
from plasmapy.plasma.sources.plasma3d import Plasma3D
from plasmapy.plasma.sources.plasmablob import PlasmaBlob
