The TensorFlow import is pretty slow. Right now we import it just to check if it's there, so that we can set the HAS_TF variable accordingly. Ideally, we would only be doing anything with TensorFlow/NengoDL if the user does something that asks for it. For example, if the user instantiates a LoihiSpikingRectifiedLinear neuron, then we might want to make sure the nengo_dl builders get added then (I feel like I've done this somewhere, but it's not in master).
The TensorFlow import is pretty slow. Right now we import it just to check if it's there, so that we can set the
HAS_TFvariable accordingly. Ideally, we would only be doing anything with TensorFlow/NengoDL if the user does something that asks for it. For example, if the user instantiates aLoihiSpikingRectifiedLinearneuron, then we might want to make sure thenengo_dlbuilders get added then (I feel like I've done this somewhere, but it's not inmaster).