Merge pull request #74 from isacdaavid/feature/iit-4.0

Small workaround to coerce working with ExplicitTPMs at Subsystem

pyphi/subsystem.py

@@ -312,7 +312,7 @@ def _single_node_cause_repertoire(self, mechanism_node_index, purview):
         mechanism_node = self._index2node[mechanism_node_index]
         # We're conditioning on this node's state, so take the TPM for the node
         # being in that state.
-        tpm = mechanism_node.tpm[..., mechanism_node.state]
+        tpm = ExplicitTPM.enforce(mechanism_node.tpm[..., mechanism_node.state])
         # Marginalize-out all parents of this mechanism node that aren't in the
         # purview.
         return tpm.marginalize_out((mechanism_node.inputs - purview)).tpm