vprops : dict (optional, default: None)
Dictionary with the vertex properties. Individual properties may also be given via the
vertex_<prop-name>parameters, where<prop-name>is the name of the property.
eprops : dict (optional, default: None)
Dictionary with the vertex properties. Individual properties may also be given via the
edge_<prop-name>parameters, where<prop-name>is the name of the property.