chore: import upstream snapshot with attribution

python/tvm/topi/testing/gather_python.py

@@ -0,0 +1,48 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# pylint: disable=invalid-name, line-too-long, unused-variable, too-many-locals
+"""gather in python"""
+
+import numpy as np
+
+
+def gather_python(data, axis, indices):
+    """Python version of Gather operator
+
+    Parameters
+    ----------
+    data : numpy.ndarray
+        Numpy array
+
+    axis: int
+        integer
+
+    indices : numpy.ndarray
+        Numpy array
+
+    Returns
+    -------
+    b_np : numpy.ndarray
+        Numpy array
+    """
+    shape_indices = indices.shape
+    out = np.zeros(shape_indices, dtype=data.dtype)
+    for index in np.ndindex(*shape_indices):
+        new_index = list(index)
+        new_index[axis] = indices[index]
+        out[index] = data[tuple(new_index)]
+    return out