add dataset read functions

fastNLP/core/dataset.py

@@ -7,6 +7,8 @@ from fastNLP.core.field import TextField, LabelField
 from fastNLP.core.instance import Instance
 from fastNLP.core.vocabulary import Vocabulary
 
+_READERS = {}
+
 class DataSet(list):
     """A DataSet object is a list of Instance objects.
 
@@ -125,3 +127,24 @@ class DataSet(list):
             self.origin_len = (origin_field + "_origin_len", origin_field) \
                 if origin_len_name is None else (origin_len_name, origin_field)
         return self
+
+    def __getattribute__(self, name):
+        if name in _READERS:
+            # add read_*data() support
+            def _read(*args, **kwargs):
+                data = _READERS[name]().load(*args, **kwargs)
+                self.extend(data)
+                return self
+            return _read
+        else:
+            return object.__getattribute__(self, name)
+
+    @classmethod
+    def set_reader(cls, method_name):
+        """decorator to add dataloader support
+        """
+        assert isinstance(method_name, str)
+        def wrapper(read_cls):
+            _READERS[method_name] = read_cls
+            return read_cls
+        return wrapper

fastNLP/core/vocabulary.py

@@ -69,6 +69,7 @@ class Vocabulary(object):
             else:
                 self.word_count[word] += 1
             self.word2idx = None
+        return self
 
 
     def build_vocab(self):

fastNLP/loader/dataset_loader.py

@@ -84,6 +84,7 @@ class DataSetLoader(BaseLoader):
         """
         raise NotImplementedError
 
+@DataSet.set_reader('read_raw')
 class RawDataSetLoader(DataSetLoader):
     def __init__(self):
         super(RawDataSetLoader, self).__init__()
@@ -98,6 +99,7 @@ class RawDataSetLoader(DataSetLoader):
     def convert(self, data):
         return convert_seq_dataset(data)
 
+@DataSet.set_reader('read_pos')
 class POSDataSetLoader(DataSetLoader):
     """Dataset Loader for POS Tag datasets.
 
@@ -166,6 +168,7 @@ class POSDataSetLoader(DataSetLoader):
         """
         return convert_seq2seq_dataset(data)
 
+@DataSet.set_reader('read_tokenize')
 class TokenizeDataSetLoader(DataSetLoader):
     """
     Data set loader for tokenization data sets
@@ -224,7 +227,7 @@ class TokenizeDataSetLoader(DataSetLoader):
     def convert(self, data):
         return convert_seq2seq_dataset(data)
 
-
+@DataSet.set_reader('read_class')
 class ClassDataSetLoader(DataSetLoader):
     """Loader for classification data sets"""
 
@@ -262,7 +265,7 @@ class ClassDataSetLoader(DataSetLoader):
     def convert(self, data):
         return convert_seq2tag_dataset(data)
 
-
+@DataSet.set_reader('read_conll')
 class ConllLoader(DataSetLoader):
     """loader for conll format files"""
 
@@ -303,7 +306,7 @@ class ConllLoader(DataSetLoader):
     def convert(self, data):
         pass
 
-
+@DataSet.set_reader('read_lm')
 class LMDataSetLoader(DataSetLoader):
     """Language Model Dataset Loader
 
@@ -339,6 +342,7 @@ class LMDataSetLoader(DataSetLoader):
     def convert(self, data):
         pass
 
+@DataSet.set_reader('read_people_daily')
 class PeopleDailyCorpusLoader(DataSetLoader):
     """
         People Daily Corpus: Chinese word segmentation, POS tag, NER

test/loader/test_dataset_loader.py

@@ -3,7 +3,7 @@ import unittest
 
 from fastNLP.loader.dataset_loader import POSDataSetLoader, LMDataSetLoader, TokenizeDataSetLoader, \
     PeopleDailyCorpusLoader, ConllLoader
-
+from fastNLP.core.dataset import DataSet
 
 class TestDatasetLoader(unittest.TestCase):
     def test_case_1(self):
@@ -15,13 +15,23 @@ class TestDatasetLoader(unittest.TestCase):
 
     def test_case_TokenizeDatasetLoader(self):
         loader = TokenizeDataSetLoader()
-        data = loader.load("./test/data_for_tests/cws_pku_utf_8", max_seq_len=32)
+        filepath = "./test/data_for_tests/cws_pku_utf_8"
+        data = loader.load(filepath, max_seq_len=32)
+        assert len(data) > 0
+
+        data1 = DataSet()
+        data1.read_tokenize(filepath, max_seq_len=32)
+        assert len(data1) > 0
         print("pass TokenizeDataSetLoader test!")
 
     def test_case_POSDatasetLoader(self):
         loader = POSDataSetLoader()
+        filepath = "./test/data_for_tests/people.txt"
         data = loader.load("./test/data_for_tests/people.txt")
         datas = loader.load_lines("./test/data_for_tests/people.txt")
+
+        data1 = DataSet().read_pos(filepath)
+        assert len(data1) > 0
         print("pass POSDataSetLoader test!")
 
     def test_case_LMDatasetLoader(self):