Update

scratchpad/tn_api/tn.py

@@ -2,7 +2,6 @@
 import math
 from dataclasses import dataclass
 from typing import TypeVar, Generic, Iterable
-from qtree import np_framework
 
 class Array(np.ndarray):
     shape: tuple
@@ -59,14 +58,23 @@ def __init__(self, *args, **kwargs):
         self._tensors = []
         self._edges = tuple()
         self.shape = tuple()
-        self.buckets = []
         self.data_dict = {}
 
     # slice not inplace
     def slice(self, slice_dict: dict) -> 'TensorNetwork':
         tn = self.copy()
-        sliced_buckets = np_framework.get_sliced_np_buckets(self.buckets, self.data_dict, slice_dict)
-        tn.buckets = sliced_buckets
+        sliced_tns = []
+        for tensor in tn._tensors:
+            slice_bounds = []
+            for idx in range(tensor.ndim):
+                try:
+                    slice_bounds.append(slice_dict[idx])
+                except KeyError:
+                    slice_bounds.append(slice(None))
+
+            sliced_tns.append(tensor[tuple(slice_bounds)])
+
+        tn._tensors = sliced_tns
         return tn
 
     def copy(self):
@@ -161,4 +169,6 @@ def __repr__(self):
 
 if __name__ == "__main__":
     tn = TensorNetwork.new_random_cpu(2, 3, 4)
+    slice_dict = {0: slice(0, 2), 1: slice(1, 3)}
+    sliced_tn = tn.slice(slice_dict)
     import pdb; pdb.set_trace()