FIX: remove warnings with recent versions of pytorch

interpol/nd.py

@@ -117,7 +117,8 @@ def pull(inp, grid, bound: List[Bound], spline: List[Spline],
         out1 = inp.gather(-1, idx)
 
         # apply sign
-        sign1 = make_sign([sgn[n] for sgn, n in zip(signs, nodes)])
+        sign0: List[Optional[Tensor]] = [sgn[n] for sgn, n in zip(signs, nodes)]
+        sign1: Optional[Tensor] = make_sign(sign0)
         if sign1 is not None:
             out1 *= sign1
 
@@ -183,7 +184,8 @@ def push(inp, grid, shape: Optional[List[int]], bound: List[Bound],
         out1 = inp.clone()
 
         # apply sign
-        sign1 = make_sign([sgn[n] for sgn, n in zip(signs, nodes)])
+        sign0: List[Optional[Tensor]] = [sgn[n] for sgn, n in zip(signs, nodes)]
+        sign1: Optional[Tensor] = make_sign(sign0)
         if sign1 is not None:
             out1 *= sign1
 
@@ -247,7 +249,8 @@ def grad(inp, grid, bound: List[Bound], spline: List[Spline],
         out0 = inp.gather(-1, idx)
 
         # apply sign
-        sign1 = make_sign([sgn[n] for sgn, n in zip(signs, nodes)])
+        sign0: List[Optional[Tensor]] = [sgn[n] for sgn, n in zip(signs, nodes)]
+        sign1: Optional[Tensor] = make_sign(sign0)
         if sign1 is not None:
             out0 *= sign1
 
@@ -319,7 +322,8 @@ def pushgrad(inp, grid, shape: Optional[List[int]], bound: List[Bound],
         out0 = inp.clone()
 
         # apply sign
-        sign1 = make_sign([sgn[n] for sgn, n in zip(signs, nodes)])
+        sign0: List[Optional[Tensor]] = [sgn[n] for sgn, n in zip(signs, nodes)]
+        sign1: Optional[Tensor] = make_sign(sign0)
         if sign1 is not None:
             out0 *= sign1.unsqueeze(-1)
 
@@ -390,7 +394,8 @@ def hess(inp, grid, bound: List[Bound], spline: List[Spline],
         out1 = inp.gather(-1, idx)
 
         # apply sign
-        sign1 = make_sign([sgn[n] for sgn, n in zip(signs, nodes)])
+        sign0: List[Optional[Tensor]] = [sgn[n] for sgn, n in zip(signs, nodes)]
+        sign1: Optional[Tensor] = make_sign(sign0)
         if sign1 is not None:
             out1 *= sign1