convert csv to mindrecord

mindspore/mindrecord/__init__.py

@@ -29,10 +29,11 @@ from .common.exceptions import *
 from .shardutils import SUCCESS, FAILED
 from .tools.cifar10_to_mr import Cifar10ToMR
 from .tools.cifar100_to_mr import Cifar100ToMR
+from .tools.csv_to_mr import CsvToMR
 from .tools.imagenet_to_mr import ImageNetToMR
 from .tools.mnist_to_mr import MnistToMR
 from .tools.tfrecord_to_mr import TFRecordToMR
 
 __all__ = ['FileWriter', 'FileReader', 'MindPage',
-           'Cifar10ToMR', 'Cifar100ToMR', 'ImageNetToMR', 'MnistToMR', 'TFRecordToMR',
+           'Cifar10ToMR', 'Cifar100ToMR', 'CsvToMR', 'ImageNetToMR', 'MnistToMR', 'TFRecordToMR',
            'SUCCESS', 'FAILED']

mindspore/mindrecord/tools/csv_to_mr.py

@@ -0,0 +1,168 @@
+# 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.
+# ==============================================================================
+"""
+Csv format convert tool for MindRecord.
+"""
+from importlib import import_module
+import os
+
+from mindspore import log as logger
+from ..filewriter import FileWriter
+from ..shardutils import check_filename
+
+try:
+    pd = import_module("pandas")
+except ModuleNotFoundError:
+    pd = None
+
+__all__ = ['CsvToMR']
+
+class CsvToMR:
+    """
+    Class is for transformation from csv to MindRecord.
+
+    Args:
+        source (str): the file path of csv.
+        destination (str): the MindRecord file path to transform into.
+        columns_list(list[str], optional): List of columns to be read(default=None).
+        partition_number (int, optional): partition size (default=1).
+
+    Raises:
+        ValueError: If source, destination, partition_number is invalid.
+        RuntimeError: If columns_list is invalid.
+    """
+
+    def __init__(self, source, destination, columns_list=None, partition_number=1):
+        if not pd:
+            raise Exception("Module pandas is not found, please use pip install it.")
+        if isinstance(source, str):
+            check_filename(source)
+            self.source = source
+        else:
+            raise ValueError("The parameter source must be str.")
+
+        self._check_columns(columns_list, "columns_list")
+        self.columns_list = columns_list
+
+        if isinstance(destination, str):
+            check_filename(destination)
+            self.destination = destination
+        else:
+            raise ValueError("The parameter destination must be str.")
+
+        if partition_number is not None:
+            if not isinstance(partition_number, int):
+                raise ValueError("The parameter partition_number must be int")
+            self.partition_number = partition_number
+        else:
+            raise ValueError("The parameter partition_number must be int")
+
+        self.writer = FileWriter(self.destination, self.partition_number)
+
+    def _check_columns(self, columns, columns_name):
+        if columns:
+            if isinstance(columns, list):
+                for col in columns:
+                    if not isinstance(col, str):
+                        raise ValueError("The parameter {} must be list of str.".format(columns_name))
+            else:
+                raise ValueError("The parameter {} must be list of str.".format(columns_name))
+
+    def _get_schema(self, df):
+        """
+        Construct schema from df columns
+        """
+        if self.columns_list:
+            for col in self.columns_list:
+                if col not in df.columns:
+                    raise RuntimeError("The parameter columns_list is illegal, column {} does not exist.".format(col))
+        else:
+            self.columns_list = df.columns
+
+        schema = {}
+        for col in self.columns_list:
+            if str(df[col].dtype) == 'int64':
+                schema[col] = {"type": "int64"}
+            elif str(df[col].dtype) == 'float64':
+                schema[col] = {"type": "float64"}
+            elif str(df[col].dtype) == 'bool':
+                schema[col] = {"type": "int32"}
+            else:
+                schema[col] = {"type": "string"}
+        if not schema:
+            raise RuntimeError("Failed to generate schema from csv file.")
+        return schema
+
+    def _get_row_of_csv(self, df):
+        """Get row data from csv file."""
+        for _, r in df.iterrows():
+            row = {}
+            for col in self.columns_list:
+                if str(df[col].dtype) == 'bool':
+                    row[col] = int(r[col])
+                else:
+                    row[col] = r[col]
+            yield row
+
+    def transform(self):
+        """
+        Executes transformation from csv to MindRecord.
+
+        Returns:
+            SUCCESS/FAILED, whether successfully written into MindRecord.
+        """
+        if not os.path.exists(self.source):
+            raise IOError("Csv file {} do not exist.".format(self.source))
+
+        pd.set_option('display.max_columns', None)
+        df = pd.read_csv(self.source)
+
+        csv_schema = self._get_schema(df)
+
+        logger.info("transformed MindRecord schema is: {}".format(csv_schema))
+
+        # set the header size
+        self.writer.set_header_size(1 << 24)
+
+        # set the page size
+        self.writer.set_page_size(1 << 26)
+
+        # create the schema
+        self.writer.add_schema(csv_schema, "csv_schema")
+
+        # add the index
+        self.writer.add_index(list(self.columns_list))
+
+        csv_iter = self._get_row_of_csv(df)
+        batch_size = 256
+        transform_count = 0
+        while True:
+            data_list = []
+            try:
+                for _ in range(batch_size):
+                    data_list.append(csv_iter.__next__())
+                    transform_count += 1
+                self.writer.write_raw_data(data_list)
+                logger.info("transformed {} record...".format(transform_count))
+            except StopIteration:
+                if data_list:
+                    self.writer.write_raw_data(data_list)
+                    logger.info(
+                        "transformed {} record...".format(transform_count))
+                break
+
+        ret = self.writer.commit()
+
+        return ret

mindspore/mindrecord/tools/tfrecord_to_mr.py

@@ -115,10 +115,8 @@ class TFRecordToMR:
                             "sequence": {"zzzz": tf.io.FixedLenSequenceFeature([], tf.float32)}}
         bytes_fields (list): the bytes fields which are in feature_dict.
 
-    Rasies:
+    Raises:
-        ValueError: the following condition will cause ValueError, 1) parameter TFRecord is not string, 2) parameter
+        ValueError: If parameter is invalid.
-            MindRecord is not string, 3) feature_dict is not FixedLenFeature, 4) parameter bytes_field is not list(str)
-            or not in feature_dict.
         Exception: when tensorflow module not found or version is not correct.
     """
     def __init__(self, source, destination, feature_dict, bytes_fields=None):

tests/ut/data/mindrecord/testCsv/data.csv

@@ -0,0 +1,7 @@
+Age,EmployNumber,Name,Sales,Over18
+21, 10023,john, 123.45,True
+41, 10223,tom, 12111,True
+51, 10231,bob, 8779.0,True
+86, 10053,alice, 7777,True
+26, 1053,carol, 12345.8,False
+

tests/ut/python/mindrecord/test_csv_to_mindrecord.py

@@ -0,0 +1,143 @@
+# 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.
+# ============================================================================
+"""test csv to mindrecord tool"""
+import os
+from importlib import import_module
+import pytest
+
+from mindspore import log as logger
+from mindspore.mindrecord import FileReader
+from mindspore.mindrecord import CsvToMR
+
+try:
+    pd = import_module('pandas')
+except ModuleNotFoundError:
+    pd = None
+
+CSV_FILE = "../data/mindrecord/testCsv/data.csv"
+MINDRECORD_FILE = "../data/mindrecord/testCsv/csv.mindrecord"
+PARTITION_NUMBER = 4
+
+@pytest.fixture(name="remove_mindrecord_file")
+def fixture_remove():
+    """add/remove file"""
+    def remove_one_file(x):
+        if os.path.exists(x):
+            os.remove(x)
+    def remove_file():
+        x = MINDRECORD_FILE
+        remove_one_file(x)
+        x = MINDRECORD_FILE + ".db"
+        remove_one_file(x)
+        for i in range(PARTITION_NUMBER):
+            x = MINDRECORD_FILE + str(i)
+            remove_one_file(x)
+            x = MINDRECORD_FILE + str(i) + ".db"
+            remove_one_file(x)
+
+    remove_file()
+    yield "yield_fixture_data"
+    remove_file()
+
+def read(filename, columns, row_num):
+    """test file reade"""
+    if not pd:
+        raise Exception("Module pandas is not found, please use pip install it.")
+    df = pd.read_csv(CSV_FILE)
+    count = 0
+    reader = FileReader(filename)
+    for _, x in enumerate(reader.get_next()):
+        for  col in columns:
+            assert x[col] == df[col].iloc[count]
+        assert len(x) == len(columns)
+        count = count + 1
+        if count == 1:
+            logger.info("data: {}".format(x))
+    assert count == row_num
+    reader.close()
+
+def test_csv_to_mindrecord(remove_mindrecord_file):
+    """test transform csv  to mindrecord."""
+    csv_trans = CsvToMR(CSV_FILE, MINDRECORD_FILE, partition_number=PARTITION_NUMBER)
+    csv_trans.transform()
+    for i in range(PARTITION_NUMBER):
+        assert os.path.exists(MINDRECORD_FILE + str(i))
+        assert os.path.exists(MINDRECORD_FILE + str(i) + ".db")
+    read(MINDRECORD_FILE + "0", ["Age", "EmployNumber", "Name", "Sales", "Over18"], 5)
+
+def test_csv_to_mindrecord_with_columns(remove_mindrecord_file):
+    """test transform csv  to mindrecord."""
+    csv_trans = CsvToMR(CSV_FILE, MINDRECORD_FILE, columns_list=['Age', 'Sales'], partition_number=PARTITION_NUMBER)
+    csv_trans.transform()
+    for i in range(PARTITION_NUMBER):
+        assert os.path.exists(MINDRECORD_FILE + str(i))
+        assert os.path.exists(MINDRECORD_FILE + str(i) + ".db")
+    read(MINDRECORD_FILE + "0", ["Age", "Sales"], 5)
+
+def test_csv_to_mindrecord_with_no_exist_columns(remove_mindrecord_file):
+    """test transform csv  to mindrecord."""
+    with pytest.raises(Exception, match="The parameter columns_list is illegal, column ssales does not exist."):
+        csv_trans = CsvToMR(CSV_FILE, MINDRECORD_FILE, columns_list=['Age', 'ssales'],
+                            partition_number=PARTITION_NUMBER)
+        csv_trans.transform()
+
+def test_csv_partition_number_with_illegal_columns(remove_mindrecord_file):
+    """
+    test transform csv  to mindrecord
+    """
+    with pytest.raises(Exception, match="The parameter columns_list must be list of str."):
+        csv_trans = CsvToMR(CSV_FILE, MINDRECORD_FILE, ["Sales", 2])
+        csv_trans.transform()
+
+
+def test_csv_to_mindrecord_default_partition_number(remove_mindrecord_file):
+    """
+    test transform csv to mindrecord
+    when partition number is default.
+    """
+    csv_trans = CsvToMR(CSV_FILE, MINDRECORD_FILE)
+    csv_trans.transform()
+    assert os.path.exists(MINDRECORD_FILE)
+    assert os.path.exists(MINDRECORD_FILE + ".db")
+    read(MINDRECORD_FILE, ["Age", "EmployNumber", "Name", "Sales", "Over18"], 5)
+
+def test_csv_partition_number_0(remove_mindrecord_file):
+    """
+    test transform csv  to mindrecord
+    when partition number is 0.
+    """
+    with pytest.raises(Exception, match="Invalid parameter value"):
+        csv_trans = CsvToMR(CSV_FILE, MINDRECORD_FILE, None, 0)
+        csv_trans.transform()
+
+def test_csv_to_mindrecord_partition_number_none(remove_mindrecord_file):
+    """
+    test transform csv to mindrecord
+    when partition number is none.
+    """
+    with pytest.raises(Exception,
+                       match="The parameter partition_number must be int"):
+        csv_trans = CsvToMR(CSV_FILE, MINDRECORD_FILE, None, None)
+        csv_trans.transform()
+
+def test_csv_to_mindrecord_illegal_filename(remove_mindrecord_file):
+    """
+    test transform csv  to mindrecord
+    when file name contains illegal character.
+    """
+    filename = "not_*ok"
+    with pytest.raises(Exception, match="File name should not contains"):
+        csv_trans = CsvToMR(CSV_FILE, filename)
+        csv_trans.transform()