add gpt2 preprocess

model_zoo/official/nlp/gpt/scripts/pre_process.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+# Copyright 2020 Huawei Technologies Co., Ltd
+#
+# 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.
+# ============================================================================
+
+echo "=============================================================================================================="
+echo "Please run the scipt as: "
+echo "bash script/pre_process.sh \"INPUT_GLOB\" DATASET_TYPE OUTPUT_FILE"
+echo "for example: bash script/pre_process.sh \"dataset/*.output\" openwebtext ./output/openwebtext.mindrecord"
+echo "=============================================================================================================="
+
+INPUT_GLOB=$1
+DATASET_TYPE=$2
+OUTPUT_FILE=$3
+
+python ./src/pre_process.py  \
+    --input_glob=$INPUT_GLOB \
+    --dataset_type=$DATASET_TYPE \
+    --output_file=$OUTPUT_FILE \
+    --file_partition=4

model_zoo/official/nlp/gpt/src/pre_process.py

@@ -0,0 +1,216 @@
+# Copyright 2020 Huawei Technologies Co., Ltd
+#
+# 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.
+# ============================================================================
+
+"""
+transform wikitext-2, wikitext-103, lambada, openwebtext dataset to mindrecord.
+"""
+import argparse
+import glob
+import json
+import os
+import re
+from multiprocessing import Pool, current_process
+import numpy as np
+
+try:
+    from transformers import GPT2Tokenizer
+except ModuleNotFoundError:
+    print("module 'transformers' not installed.")
+
+from mindspore.mindrecord import FileWriter
+
+
+EOT = 50256  # id of endoftext
+SEQ_LEN = 1025  # the length of sample
+tokenizer = GPT2Tokenizer.from_pretrained("gpt2")
+
+
+def chunks(lst, n):
+    """ yield n sized chunks from list"""
+    for i in range(0, len(lst), n):
+        yield lst[i:i+n]
+
+
+def package_file(it, n):
+    """ package multiple files"""
+    stop = False
+    while not stop:
+        batch = []
+        for _ in range(n):
+            try:
+                batch.append(next(it))
+            except StopIteration:
+                stop = True
+        if not batch:
+            break
+        yield batch
+
+
+def clean_wikitext(string):
+    """ cleaning wikitext dataset"""
+    # contractions
+    string = string.replace("s '", "s'")
+    string = re.sub(r"/' [0-9]/", r"/'[0-9]/", string)
+    # number separators
+    string = string.replace(" @-@ ", "-")
+    string = string.replace(" @,@ ", ",")
+    string = string.replace(" @.@ ", ".")
+    # punctuation
+    string = string.replace(" : ", ": ")
+    string = string.replace(" ; ", "; ")
+    string = string.replace(" . ", ". ")
+    string = string.replace(" ! ", "! ")
+    string = string.replace(" ? ", "? ")
+    string = string.replace(" , ", ", ")
+    # double brackets
+    string = re.sub(r"\(\s*([^\)]*?)\s*\)", r"(\1)", string)
+    string = re.sub(r"\[\s*([^\]]*?)\s*\]", r"[\1]", string)
+    string = re.sub(r"{\s*([^}]*?)\s*}", r"{\1}", string)
+    string = re.sub(r"\"\s*([^\"]*?)\s*\"", r'"\1"', string)
+    string = re.sub(r"'\s*([^']*?)\s*'", r"'\1'", string)
+    # miscellaneous
+    string = string.replace("= = = =", "====")
+    string = string.replace("= = =", "===")
+    string = string.replace("= =", "==")
+    string = string.replace(" "+chr(176)+" ", chr(176))
+    string = string.replace(" \n", "\n")
+    string = string.replace("\n ", "\n")
+    string = string.replace(" N ", " 1 ")
+    string = string.replace(" 's", "'s")
+    return string
+
+
+def tokenize_openwebtext(iterator):
+    """ tokenize openwebtext dataset"""
+    for file_path in iterator:
+        if os.path.getsize(file_path) == 0:
+            continue
+        content = []
+        with open(file_path, 'r', encoding='utf-8') as f:
+            for para in f.read().split("\n\n"):
+                if para:
+                    tokenized_text = tokenizer.tokenize(para)
+                    content += tokenizer.convert_tokens_to_ids(tokenized_text) + [
+                        EOT]
+        for chunk in chunks(content, SEQ_LEN):
+            sample = {}
+            if len(chunk) == SEQ_LEN:
+                sample['input_ids'] = np.array(chunk, dtype=np.int32)
+                yield sample
+
+
+def tokenize_wiki(file_path):
+    """tokenize wikitext-2/wikitext-103 dataset"""
+    content = []
+    with open(file_path, 'r', encoding='utf-8') as f:
+        for para in clean_wikitext(f.read()).split("\n\n"):
+            if para and para.strip().startswith('=') is False:
+                tokenized_text = tokenizer.tokenize(para)
+                content += tokenizer.convert_tokens_to_ids(tokenized_text) + [
+                    EOT]
+    for chunk in chunks(content, SEQ_LEN):
+        sample = {}
+        if len(chunk) == SEQ_LEN:
+            sample['input_ids'] = np.array(chunk, dtype=np.int32)
+            yield sample
+
+
+def tokenize_lambada(file_path):
+    """tokenize lambada dataset"""
+    content = []
+    with open(file_path, 'r', encoding='utf-8') as f:
+        for line in f.readlines():
+            para = json.loads(line)['text'].replace(
+                "“", '""').replace("”", '"').strip().strip(".")
+            tokenized_text = tokenizer.tokenize(para)
+            content += tokenizer.convert_tokens_to_ids(tokenized_text) + [EOT]
+    for chunk in chunks(content, SEQ_LEN):
+        sample = {}
+        if len(chunk) == SEQ_LEN:
+            sample['input_ids'] = np.array(chunk, dtype=np.int32)
+            yield sample
+
+
+def task_unit(iterator, parallel_writer=True):
+    """task for each process"""
+    p = current_process()
+    index = p.pid if p.pid else 0
+
+    item_iter = tokenize_openwebtext(iterator)
+    batch_size = 1024  # size of write batch
+    count = 0
+    while True:
+        data_batch = []
+        try:
+            for _ in range(batch_size):
+                data_batch.append(next(item_iter))
+                count += 1
+            writer.write_raw_data(data_batch, parallel_writer=parallel_writer)
+            print("Process {} transformed {} records.".format(
+                index, count))
+        except StopIteration:
+            if data_batch:
+                writer.write_raw_data(data_batch,
+                                      parallel_writer=parallel_writer)
+                print("Process {} transformed {} records.".format(
+                    index, count))
+            break
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--dataset_type', type=str, default='openwebtext')
+    parser.add_argument('--input_glob', type=str, default='*.txt')
+    parser.add_argument('--output_file', type=str,
+                        default='./output/openweb_mindrecord')
+    parser.add_argument('--file_partition', type=int, default=1)
+    parser.add_argument('--file_batch_size', type=int, default=1024)
+    parser.add_argument('--num_process', type=int, default=64)
+
+    args = parser.parse_args()
+    ###
+    out_dir, out_file = os.path.split(os.path.abspath(args.output_file))
+    if not os.path.exists(out_dir):
+        os.mkdir(out_dir)
+    schema = {"input_ids": {"type": "int32", "shape": [-1]},}
+    writer = FileWriter(file_name=args.output_file,
+                        shard_num=args.file_partition)
+    writer.add_schema(schema, args.dataset_type)
+    writer.open_and_set_header()
+    ###
+    transforms_count = 0
+    if args.dataset_type == 'wiki':
+        for x in tokenize_wiki(args.input_glob):
+            transforms_count += 1
+            writer.write_raw_data([x])
+        print("Transformed {} records.".format(transforms_count))
+    elif args.dataset_type == 'lambada':
+        for x in tokenize_lambada(args.input_glob):
+            transforms_count += 1
+            writer.write_raw_data([x])
+        print("Transformed {} records.".format(transforms_count))
+    elif args.dataset_type == 'openwebtext':
+        file_iter = glob.iglob(args.input_glob)
+        with Pool(processes=args.num_process) as pool:
+            pool.map(task_unit, package_file(file_iter, args.file_batch_size))
+    else:
+        raise ValueError(
+            "Not support dataset type: {}".format(args.dataset_type))
+
+    writer.commit()
+    out_file = args.output_file
+    if args.file_partition > 1:
+        out_file += '0'
+    print("Transform finished, output files refer: {}".format(out_file))