diff --git a/partitions.py b/partitions.py
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+++ b/partitions.py
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+#!/usr/bin/env python
+# coding=utf-8
+# Copyright 2021 The Google Research Authors and The HuggingFace Team All rights reserved.
+#
+# Licensed 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.
+"""Utilities for constructing PyTrees of PartitionSpecs."""
+
+# utils adapted from https://github.com/google-research/google-research/blob/master/flax_models/t5x/partitions.py
+
+import re
+
+from flax.core.frozen_dict import freeze
+from flax.traverse_util import flatten_dict, unflatten_dict
+from jax.experimental import PartitionSpec as P
+
+
+# Sentinels
+_unmatched = object()
+
+# For specifying empty leaf dict `{}`
+empty_dict = object()
+
+
+def _match(qs, ks):
+    """Return True if regexes in qs match any window of strings in tuple ks."""
+    # compile regexes and force complete match
+    qts = tuple(map(lambda x: re.compile(x + "$"), qs))
+    for i in range(len(ks) - len(qs) + 1):
+        matches = [x.match(y) for x, y in zip(qts, ks[i:])]
+        if matches and all(matches):
+            return True
+    return False
+
+
+def _replacement_rules(rules):
+    def replace(key, val):
+        for rule, replacement in rules:
+            if _match(rule, key):
+                return replacement
+        return val
+
+    return replace
+
+
+# PartitionSpec for GPTNeo
+# replicate the hidden dim and shard feed-forward and head dim
+def _get_partition_rules():
+    return [
+        # embeddings
+        (("transformer", "wpe", "embedding"), P("mp", None)),
+        (("transformer", "wte", "embedding"), P("mp", None)),
+        # atention
+        (("attention", "(q_proj|k_proj|v_proj)", "kernel"), P(None, "mp")),
+        (("attention", "out_proj", "kernel"), P("mp", None)),
+        (("attention", "out_proj", "bias"), None),
+        # mlp
+        (("mlp", "c_fc", "kernel"), P(None, "mp")),
+        (("mlp", "c_fc", "bias"), P("mp")),
+        (("mlp", "c_proj", "kernel"), P("mp", None)),
+        (("mlp", "c_proj", "bias"), None),
+        # layer norms
+        ((r"ln_\d+", "bias"), None),
+        ((r"\d+", r"ln_\d+", "scale"), None),
+        (("ln_f", "bias"), None),
+        (("ln_f", "scale"), None),
+    ]
+
+
+def set_partitions(in_dict):
+    rules = _get_partition_rules()
+    replace = _replacement_rules(rules)
+    initd = {k: _unmatched for k in flatten_dict(in_dict)}
+    result = {k: replace(k, v) for k, v in initd.items()}
+    assert _unmatched not in result.values(), "Incomplete partition spec."
+    return freeze(unflatten_dict(result))
+{"mode":"full","isActive":false}
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