Adjust phi.torch.flow to phi.tf.flow
# pylint: disable-msg = wildcard-import, unused-wildcard-import, unused-import
+import torch
from phi.flow import *
from .torch_util import *
from .torch_app import *
-import torch
+from .torch_backend import TorchBackend
+
+TORCH_BACKEND = TorchBackend()
+math.DYNAMIC_BACKEND.add_backend(TORCH_BACKEND)
+math.DYNAMIC_BACKEND.default_backend = TORCH_BACKEND
