diff --git a/fastNLP/core/dataset.py b/fastNLP/core/dataset.py index 9005a8d6..b362f23b 100644 --- a/fastNLP/core/dataset.py +++ b/fastNLP/core/dataset.py @@ -933,7 +933,8 @@ class DataSet(object): if 'ignore_type' not in extra_param: extra_param['ignore_type'] = old_field.ignore_type self.add_field(field_name=new_field_name, fields=results, is_input=extra_param["is_input"], - is_target=extra_param["is_target"], ignore_type=extra_param['ignore_type']) + is_target=extra_param["is_target"], ignore_type=extra_param['ignore_type'], + padder=self.get_field(new_field_name).padder) else: self.add_field(field_name=new_field_name, fields=results, is_input=extra_param.get("is_input", None), is_target=extra_param.get("is_target", None), diff --git a/fastNLP/core/field.py b/fastNLP/core/field.py index 03b2e841..9834a653 100644 --- a/fastNLP/core/field.py +++ b/fastNLP/core/field.py @@ -38,8 +38,286 @@ class AppendToTargetOrInputException(Exception): self.field_name = field_name # 标示当前field的名称 +def _get_ele_type_and_dim(cell: Any, dim=0): + r""" + 识别cell的类别与dimension的数量 + + numpy scalar type:https://docs.scipy.org/doc/numpy-1.13.0/reference/arrays.scalars.html + :param cell: + :param dim: + :return: + """ + if isinstance(cell, (str, Number, np.bool_)): + if hasattr(cell, 'dtype'): + return cell.dtype.type, dim + return type(cell), dim + elif isinstance(cell, list): + dim += 1 + res = [_get_ele_type_and_dim(cell_i, dim) for cell_i in cell] + types = set([i for i, j in res]) + dims = set([j for i, j in res]) + if len(types) > 1: + raise SetInputOrTargetException("Mixed types detected: {}.".format(list(types))) + elif len(types) == 0: + raise SetInputOrTargetException("Empty value encountered.") + if len(dims) > 1: + raise SetInputOrTargetException("Mixed dimension detected: {}.".format(list(dims))) + return types.pop(), dims.pop() + elif isinstance(cell, torch.Tensor): + return cell.dtype, cell.dim() + dim # 如果是torch.mean的结果是0 + elif isinstance(cell, np.ndarray): + if cell.dtype != np.dtype('O'): # 如果不是object的话说明是well-formatted的了 + return cell.dtype.type, cell.ndim + dim # dtype.type返回的会是np.int32, np.float等 + # 否则需要继续往下iterate + dim += 1 + res = [_get_ele_type_and_dim(cell_i, dim) for cell_i in cell] + types = set([i for i, j in res]) + dims = set([j for i, j in res]) + if len(types) > 1: + raise SetInputOrTargetException("Mixed types detected: {}.".format(list(types))) + elif len(types) == 0: + raise SetInputOrTargetException("Empty value encountered.") + if len(dims) > 1: + raise SetInputOrTargetException("Mixed dimension detected: {}.".format(list(dims))) + return types.pop(), dims.pop() + else: # 包含tuple, set, dict以及其它的类型 + raise SetInputOrTargetException(f"Cannot process type:{type(cell)}.") + + +class Padder: + r""" + 所有padder都需要继承这个类，并覆盖__call__方法。 + 用于对batch进行padding操作。传入的element是inplace的，即直接修改element可能导致数据变化，建议inplace修改之前deepcopy一份。 + + .. py:function:: __call__(self, contents, field_name, field_ele_dtype): + + """ + + def __init__(self, pad_val=0, **kwargs): + r""" + + :param List[Any] contents: 传入的element是inplace的，即直接修改element可能导致数据变化，建议inplace修改之前 + deepcopy一份。 + :param str, field_name: field的名称。 + :param np.int64,np.float64,np.str,None, field_ele_dtype: 该field的内层元素的类型。如果该field的ignore_type为True，该这个值为None。 + :return: np.array([padded_element]) + """ + self.pad_val = pad_val + + def set_pad_val(self, pad_val): + self.pad_val = pad_val + + def get_pad_val(self): + return self.pad_val + + @abstractmethod + def __call__(self, contents, field_name, field_ele_dtype, dim: int): + r""" + 传入的是List内容。假设有以下的DataSet。 + + :param List[Any] contents: 传入的element是inplace的，即直接修改element可能导致数据变化，建议inplace修改之前 + deepcopy一份。 + :param str, field_name: field的名称。 + :param np.int64,np.float64,np.str,None, field_ele_dtype: 该field的内层元素的类型。如果该field的ignore_type为True， + 该这个值为None。 + :param dim: 这个field的维度。当ignore_type为True时，该值为None + :return: np.array([padded_element]) + + Example:: + + from fastNLP import DataSet + from fastNLP import Instance + dataset = DataSet() + dataset.append(Instance(sent='this is a demo', length=4, + chars=[['t', 'h', 'i', 's'], ['i', 's'], ['a'], ['d', 'e', 'm', 'o']])) + dataset.append(Instance(sent='another one', length=2, + chars=[['a', 'n', 'o', 't', 'h', 'e', 'r'], ['o', 'n', 'e']])) + 如果调用 + batch = dataset.get([0,1], pad=True) + sent这个field的padder的__call__会接收到的内容会是 + [ + 'this is a demo', + 'another one' + ] + + length这个field的padder的__call__会接收到的内容会是 + [4, 2] + + chars这个field的padder的__call__会接收到的内容会是 + [ + [['t', 'h', 'i', 's'], ['i', 's'], ['a'], ['d', 'e', 'm', 'o']], + [['a', 'n', 'o', 't', 'h', 'e', 'r'], ['o', 'n', 'e']] + ] + + 即把每个instance中某个field的内容合成一个List传入 + + """ + raise NotImplementedError + + +class AutoPadder(Padder): + r""" + 根据contents的数据自动判定是否需要做padding。 + + 1 如果元素类型(元素类型是指field中最里层元素的数据类型, 可以通过FieldArray.dtype查看，比如['This', 'is', ...]的元素类 + 型为str, [[1,2], ...]的元素类型为int)的数据不为数值类型则不会进行pad + + 2 如果元素类型为数值类型,比如np.int64, np.float64, int, float, torch.int64等 + + 2.1 如果该field的内容为数值类型(包括int, float等)，比如为seq_len, 则不进行padding + + 2.2 如果该field的内容等价于一维list, 那么会将Batch中的List pad为一样长。 + + 2.3 如果该field的内容等价于二维list，那么会按照英语character padding的方式进行padding。如果是character padding建议使用 + :class: fastNLP.EngChar2DPadder. + + 2.4 如果该field的内容等价于三维list，则如果每个instance在每个维度上相等，会组成一个batch的tensor返回，这种情况应该是为图片 + 的情况。 + + 3 其它情况不进行处理，返回一个np.array类型。 + """ + + def __init__(self, pad_val=0): + super().__init__(pad_val=pad_val) + + def __call__(self, contents, field_name, field_ele_dtype, dim): + if field_ele_dtype: + if dim > 3: + return np.array(contents) + if isinstance(field_ele_dtype, type) and \ + (issubclass(field_ele_dtype, np.number) or issubclass(field_ele_dtype, Number)): + if dim == 0: + array = np.array(contents, dtype=field_ele_dtype) + elif dim == 1: + max_len = max(map(len, contents)) + array = np.full((len(contents), max_len), self.pad_val, dtype=field_ele_dtype) + for i, content_i in enumerate(contents): + array[i, :len(content_i)] = content_i + elif dim == 2: + max_len = max(map(len, contents)) + max_word_len = max([max([len(content_ii) for content_ii in content_i]) for + content_i in contents]) + array = np.full((len(contents), max_len, max_word_len), self.pad_val, dtype=field_ele_dtype) + for i, content_i in enumerate(contents): + for j, content_ii in enumerate(content_i): + array[i, j, :len(content_ii)] = content_ii + else: + shape = np.shape(contents) + if len(shape) == 4: # 说明各dimension是相同的大小 + array = np.array(contents, dtype=field_ele_dtype) + else: + raise RuntimeError( + f"Field:{field_name} has 3 dimensions, every sample should have the same shape.") + return array + elif str(field_ele_dtype).startswith('torch'): + if dim == 0: + tensor = torch.tensor(contents).to(field_ele_dtype) + elif dim == 1: + max_len = max(map(len, contents)) + tensor = torch.full((len(contents), max_len), fill_value=self.pad_val, dtype=field_ele_dtype) + for i, content_i in enumerate(contents): + tensor[i, :len(content_i)] = content_i.clone().detach() + elif dim == 2: + max_len = max(map(len, contents)) + max_word_len = max([max([len(content_ii) for content_ii in content_i]) for + content_i in contents]) + tensor = torch.full((len(contents), max_len, max_word_len), fill_value=self.pad_val, + dtype=field_ele_dtype) + for i, content_i in enumerate(contents): + for j, content_ii in enumerate(content_i): + tensor[i, j, :len(content_ii)] = content_ii.clone().detach() + else: + shapes = set([np.shape(content_i) for content_i in contents]) + if len(shapes) > 1: + raise RuntimeError( + f"Field:{field_name} has 3 dimensions, every sample should have the same shape.") + shape = shapes.pop() + if len(shape) == 3: + tensor = torch.full([len(contents)] + list(shape), fill_value=self.pad_val, + dtype=field_ele_dtype) + for i, content_i in enumerate(contents): + tensor[i] = content_i.clone().detach().to(field_ele_dtype) + else: + raise RuntimeError( + f"Field:{field_name} has 3 dimensions, every sample should have the same shape.") + return tensor + else: + return np.array(contents) # 不进行任何操作 + else: + return np.array(contents) + + +class EngChar2DPadder(Padder): + r""" + 用于为英语执行character级别的2D padding操作。对应的field内容应该类似[['T', 'h', 'i', 's'], ['a'], ['d', 'e', 'm', 'o']]， + 但这个Padder只能处理index为int的情况。 + + padded过后的batch内容，形状为(batch_size, max_sentence_length, max_word_length). max_sentence_length为这个batch中最大句 + 子长度；max_word_length为这个batch中最长的word的长度:: + + from fastNLP import DataSet + from fastNLP import EngChar2DPadder + from fastNLP import Vocabulary + dataset = DataSet({'sent': ['This is the first demo', 'This is the second demo']}) + dataset.apply(lambda ins:[list(word) for word in ins['sent'].split()], new_field_name='chars') + vocab = Vocabulary() + vocab.from_dataset(dataset, field_name='chars') + vocab.index_dataset(dataset, field_name='chars') + dataset.set_input('chars') + padder = EngChar2DPadder() + dataset.set_padder('chars', padder) # chars这个field的设置为了EnChar2DPadder + + """ + + def __init__(self, pad_val=0, pad_length=0): + r""" + :param pad_val: int, pad的位置使用该index + :param pad_length: int, 如果为0则取一个batch中最大的单词长度作为padding长度。如果为大于0的数，则将所有单词的长度 + 都pad或截取到该长度. + """ + super().__init__(pad_val=pad_val) + + self.pad_length = pad_length + + def __call__(self, contents, field_name, field_ele_dtype, dim): + r""" + 期望输入类似于 + [ + [[0, 2], [2, 3, 4], ..], + [[9, 8, 2, 4], [1, 2,], ...], + .... + ] + + :param contents: + :param field_name: + :param field_ele_dtype + :return: + """ + if field_ele_dtype not in (np.int64, np.float64, int, float): + raise TypeError('dtype of Field:{} should be np.int64 or np.float64 to do 2D padding, get {}.'.format( + field_name, field_ele_dtype + )) + assert dim == 2, f"Field:{field_name} has {dim}, EngChar2DPadder only supports input with 2 dimensions." + if self.pad_length < 1: + max_char_length = max([max(len(char_lst) for char_lst in word_lst) for word_lst in contents]) + else: + max_char_length = self.pad_length + max_sent_length = max(len(word_lst) for word_lst in contents) + batch_size = len(contents) + dtype = type(contents[0][0][0]) + + padded_array = np.full((batch_size, max_sent_length, max_char_length), fill_value=self.pad_val, + dtype=dtype) + for b_idx, word_lst in enumerate(contents): + for c_idx, char_lst in enumerate(word_lst): + chars = char_lst[:max_char_length] + padded_array[b_idx, c_idx, :len(chars)] = chars + + return padded_array + + class FieldArray: - def __init__(self, name, content, is_target=False, is_input=False, padder=None, ignore_type=False, + def __init__(self, name, content, is_target=False, is_input=False, padder=AutoPadder(), ignore_type=False, use_1st_ins_infer_dim_type=True): if len(content) == 0: raise RuntimeError("Empty fieldarray is not allowed.") @@ -58,34 +336,29 @@ class FieldArray: self._use_1st_ins_infer_dim_type = bool(use_1st_ins_infer_dim_type) self._is_input = False self._is_target = False - + if is_input: self.is_input = is_input if is_target: self.is_target = is_target - - if padder is None: - padder = AutoPadder(pad_val=0) - else: - assert isinstance(padder, Padder), "padder must be of type fastNLP.Padder." - padder = deepcopy(padder) + self.set_padder(padder) - + @property def ignore_type(self): return self._ignore_type - + @ignore_type.setter def ignore_type(self, value): if value: self._cell_ndim = None self.dtype = None self._ignore_type = value - + @property def is_input(self): return self._is_input - + @is_input.setter def is_input(self, value): r""" @@ -100,11 +373,11 @@ class FieldArray: self.dtype = None self._cell_ndim = None self._is_input = value - + @property def is_target(self): return self._is_target - + @is_target.setter def is_target(self, value): r""" @@ -118,7 +391,7 @@ class FieldArray: self.dtype = None self._cell_ndim = None self._is_target = value - + def _check_dtype_and_ndim(self, only_check_1st_ins_dim_type=True): r""" 检查当前content所有的element是否是同一个类型，且是否每个元素具有相同的维度。通过的话，设置_cell_ndim与_ele_type属性；没有 @@ -148,7 +421,7 @@ class FieldArray: except SetInputOrTargetException as e: e.index = index raise e - + def append(self, val: Any): r""" :param val: 把该val append到fieldarray。 @@ -165,7 +438,7 @@ class FieldArray: self.content.append(val) else: self.content.append(val) - + def pop(self, index): r""" 删除该field中index处的元素 @@ -173,10 +446,10 @@ class FieldArray: :return: """ self.content.pop(index) - + def __getitem__(self, indices): return self.get(indices, pad=False) - + def __setitem__(self, idx, val): assert isinstance(idx, int) if (self._is_target or self._is_input) and self.ignore_type is False: # 需要检测类型 @@ -188,7 +461,7 @@ class FieldArray: raise RuntimeError(f"Value(dim:{dim_}) are of different dimensions with " f"previous values(dim:{self._cell_ndim}).") self.content[idx] = val - + def get(self, indices, pad=True): r""" 根据给定的indices返回内容。 @@ -208,7 +481,7 @@ class FieldArray: return self.pad(contents) else: return np.array(contents) - + def pad(self, contents): r""" 传入list的contents，将contents使用padder进行padding，contents必须为从本FieldArray中取出的。 @@ -217,7 +490,7 @@ class FieldArray: :return: """ return self.padder(contents, field_name=self.name, field_ele_dtype=self.dtype, dim=self._cell_ndim) - + def set_padder(self, padder): r""" 设置padder，在这个field进行pad的时候用这个padder进行pad，如果为None则不进行pad。 @@ -225,11 +498,11 @@ class FieldArray: :param padder: :class:`~fastNLP.Padder` 类型，设置为None即删除padder。 """ if padder is not None: - assert isinstance(padder, Padder), "padder must be of type Padder." + assert isinstance(padder, Padder), "padder must be of type `fastNLP.core.Padder`." self.padder = deepcopy(padder) else: self.padder = None - + def set_pad_val(self, pad_val): r""" 修改padder的pad_val. @@ -239,7 +512,7 @@ class FieldArray: if self.padder is not None: self.padder.set_pad_val(pad_val) return self - + def __len__(self): r""" Returns the size of FieldArray. @@ -247,7 +520,7 @@ class FieldArray: :return int length: """ return len(self.content) - + def to(self, other): r""" 将other的属性复制给本FieldArray(other必须为FieldArray类型). @@ -257,14 +530,14 @@ class FieldArray: :return: :class:`~fastNLP.FieldArray` """ assert isinstance(other, FieldArray), "Only supports fastNLP.FieldArray type, not {}.".format(type(other)) - + self.ignore_type = other.ignore_type self.is_input = other.is_input self.is_target = other.is_target self.padder = other.padder - + return self - + def split(self, sep: str = None, inplace: bool = True): r""" 依次对自身的元素使用.split()方法，应该只有当本field的元素为str时，该方法才有用。将返回值 @@ -281,421 +554,143 @@ class FieldArray: logger.error(f"Exception happens when process value in index {index}.") raise e return self._after_process(new_contents, inplace=inplace) - + def int(self, inplace: bool = True): r""" 将本field中的值调用int(cell). 支持field中内容为以下两种情况(1)['1', '2', ...](即field中每个值为str的)， (2) [['1', '2', ..], ['3', ..], ...](即field中每个值为一个list，list中的值会被依次转换。) :param inplace: 如果为True，则将新生成值替换本field。否则返回list。 - :return: List[int], List[List[int]], self - """ - new_contents = [] - for index, cell in enumerate(self.content): - try: - if isinstance(cell, list): - new_contents.append([int(value) for value in cell]) - else: - new_contents.append(int(cell)) - except Exception as e: - logger.error(f"Exception happens when process value in index {index}.") - raise e - return self._after_process(new_contents, inplace=inplace) - - def float(self, inplace=True): - r""" - 将本field中的值调用float(cell). 支持field中内容为以下两种情况(1)['1', '2', ...](即field中每个值为str的)， - (2) [['1', '2', ..], ['3', ..], ...](即field中每个值为一个list，list中的值会被依次转换。) - - :param inplace: 如果为True，则将新生成值替换本field。否则返回list。 - :return: - """ - new_contents = [] - for index, cell in enumerate(self.content): - try: - if isinstance(cell, list): - new_contents.append([float(value) for value in cell]) - else: - new_contents.append(float(cell)) - except Exception as e: - logger.error(f"Exception happens when process value in index {index}.") - raise e - return self._after_process(new_contents, inplace=inplace) - - def bool(self, inplace=True): - r""" - 将本field中的值调用bool(cell). 支持field中内容为以下两种情况(1)['1', '2', ...](即field中每个值为str的)， - (2) [['1', '2', ..], ['3', ..], ...](即field中每个值为一个list，list中的值会被依次转换。) - - :param inplace: 如果为True，则将新生成值替换本field。否则返回list。 - :return: - """ - new_contents = [] - for index, cell in enumerate(self.content): - try: - if isinstance(cell, list): - new_contents.append([bool(value) for value in cell]) - else: - new_contents.append(bool(cell)) - except Exception as e: - logger.error(f"Exception happens when process value in index {index}.") - raise e - - return self._after_process(new_contents, inplace=inplace) - - def lower(self, inplace=True): - r""" - 将本field中的值调用cell.lower(). 支持field中内容为以下两种情况(1)['1', '2', ...](即field中每个值为str的)， - (2) [['1', '2', ..], ['3', ..], ...](即field中每个值为一个list，list中的值会被依次转换。) - - :param inplace: 如果为True，则将新生成值替换本field。否则返回list。 - :return: List[int], List[List[int]], self - """ - new_contents = [] - for index, cell in enumerate(self.content): - try: - if isinstance(cell, list): - new_contents.append([value.lower() for value in cell]) - else: - new_contents.append(cell.lower()) - except Exception as e: - logger.error(f"Exception happens when process value in index {index}.") - raise e - return self._after_process(new_contents, inplace=inplace) - - def upper(self, inplace=True): - r""" - 将本field中的值调用cell.lower(). 支持field中内容为以下两种情况(1)['1', '2', ...](即field中每个值为str的)， - (2) [['1', '2', ..], ['3', ..], ...](即field中每个值为一个list，list中的值会被依次转换。) - - :param inplace: 如果为True，则将新生成值替换本field。否则返回list。 - :return: List[int], List[List[int]], self - """ - new_contents = [] - for index, cell in enumerate(self.content): - try: - if isinstance(cell, list): - new_contents.append([value.upper() for value in cell]) - else: - new_contents.append(cell.upper()) - except Exception as e: - logger.error(f"Exception happens when process value in index {index}.") - raise e - return self._after_process(new_contents, inplace=inplace) - - def value_count(self): - r""" - 返回该field下不同value的数量。多用于统计label数量 - - :return: Counter, key是label，value是出现次数 - """ - count = Counter() - - def cum(cell): - if _is_iterable(cell) and not isinstance(cell, str): - for cell_ in cell: - cum(cell_) - else: - count[cell] += 1 - - for cell in self.content: - cum(cell) - return count - - def _after_process(self, new_contents, inplace): - r""" - 当调用处理函数之后，决定是否要替换field。 - - :param new_contents: - :param inplace: - :return: self或者生成的content - """ - if inplace: - self.content = new_contents - try: - self.is_input = self.is_input - self.is_target = self.is_input - except SetInputOrTargetException as e: - logger.error("The newly generated field cannot be set as input or target.") - raise e - return self - else: - return new_contents - - -def _get_ele_type_and_dim(cell: Any, dim=0): - r""" - 识别cell的类别与dimension的数量 - - numpy scalar type:https://docs.scipy.org/doc/numpy-1.13.0/reference/arrays.scalars.html - :param cell: - :param dim: - :return: - """ - if isinstance(cell, (str, Number, np.bool_)): - if hasattr(cell, 'dtype'): - return cell.dtype.type, dim - return type(cell), dim - elif isinstance(cell, list): - dim += 1 - res = [_get_ele_type_and_dim(cell_i, dim) for cell_i in cell] - types = set([i for i, j in res]) - dims = set([j for i, j in res]) - if len(types) > 1: - raise SetInputOrTargetException("Mixed types detected: {}.".format(list(types))) - elif len(types) == 0: - raise SetInputOrTargetException("Empty value encountered.") - if len(dims) > 1: - raise SetInputOrTargetException("Mixed dimension detected: {}.".format(list(dims))) - return types.pop(), dims.pop() - elif isinstance(cell, torch.Tensor): - return cell.dtype, cell.dim() + dim # 如果是torch.mean的结果是0 - elif isinstance(cell, np.ndarray): - if cell.dtype != np.dtype('O'): # 如果不是object的话说明是well-formatted的了 - return cell.dtype.type, cell.ndim + dim # dtype.type返回的会是np.int32, np.float等 - # 否则需要继续往下iterate - dim += 1 - res = [_get_ele_type_and_dim(cell_i, dim) for cell_i in cell] - types = set([i for i, j in res]) - dims = set([j for i, j in res]) - if len(types) > 1: - raise SetInputOrTargetException("Mixed types detected: {}.".format(list(types))) - elif len(types) == 0: - raise SetInputOrTargetException("Empty value encountered.") - if len(dims) > 1: - raise SetInputOrTargetException("Mixed dimension detected: {}.".format(list(dims))) - return types.pop(), dims.pop() - else: # 包含tuple, set, dict以及其它的类型 - raise SetInputOrTargetException(f"Cannot process type:{type(cell)}.") - - -class Padder: - r""" - 所有padder都需要继承这个类，并覆盖__call__方法。 - 用于对batch进行padding操作。传入的element是inplace的，即直接修改element可能导致数据变化，建议inplace修改之前deepcopy一份。 - - .. py:function:: __call__(self, contents, field_name, field_ele_dtype): - - """ - - def __init__(self, pad_val=0, **kwargs): - r""" - - :param List[Any] contents: 传入的element是inplace的，即直接修改element可能导致数据变化，建议inplace修改之前 - deepcopy一份。 - :param str, field_name: field的名称。 - :param np.int64,np.float64,np.str,None, field_ele_dtype: 该field的内层元素的类型。如果该field的ignore_type为True，该这个值为None。 - :return: np.array([padded_element]) - """ - self.pad_val = pad_val - - def set_pad_val(self, pad_val): - self.pad_val = pad_val - - def get_pad_val(self): - return self.pad_val - - @abstractmethod - def __call__(self, contents, field_name, field_ele_dtype, dim: int): - r""" - 传入的是List内容。假设有以下的DataSet。 - - :param List[Any] contents: 传入的element是inplace的，即直接修改element可能导致数据变化，建议inplace修改之前 - deepcopy一份。 - :param str, field_name: field的名称。 - :param np.int64,np.float64,np.str,None, field_ele_dtype: 该field的内层元素的类型。如果该field的ignore_type为True， - 该这个值为None。 - :param dim: 这个field的维度。当ignore_type为True时，该值为None - :return: np.array([padded_element]) - - Example:: - - from fastNLP import DataSet - from fastNLP import Instance - dataset = DataSet() - dataset.append(Instance(sent='this is a demo', length=4, - chars=[['t', 'h', 'i', 's'], ['i', 's'], ['a'], ['d', 'e', 'm', 'o']])) - dataset.append(Instance(sent='another one', length=2, - chars=[['a', 'n', 'o', 't', 'h', 'e', 'r'], ['o', 'n', 'e']])) - 如果调用 - batch = dataset.get([0,1], pad=True) - sent这个field的padder的__call__会接收到的内容会是 - [ - 'this is a demo', - 'another one' - ] - - length这个field的padder的__call__会接收到的内容会是 - [4, 2] - - chars这个field的padder的__call__会接收到的内容会是 - [ - [['t', 'h', 'i', 's'], ['i', 's'], ['a'], ['d', 'e', 'm', 'o']], - [['a', 'n', 'o', 't', 'h', 'e', 'r'], ['o', 'n', 'e']] - ] - - 即把每个instance中某个field的内容合成一个List传入 - + :return: List[int], List[List[int]], self """ - raise NotImplementedError + new_contents = [] + for index, cell in enumerate(self.content): + try: + if isinstance(cell, list): + new_contents.append([int(value) for value in cell]) + else: + new_contents.append(int(cell)) + except Exception as e: + logger.error(f"Exception happens when process value in index {index}.") + raise e + return self._after_process(new_contents, inplace=inplace) + def float(self, inplace=True): + r""" + 将本field中的值调用float(cell). 支持field中内容为以下两种情况(1)['1', '2', ...](即field中每个值为str的)， + (2) [['1', '2', ..], ['3', ..], ...](即field中每个值为一个list，list中的值会被依次转换。) -class AutoPadder(Padder): - r""" - 根据contents的数据自动判定是否需要做padding。 + :param inplace: 如果为True，则将新生成值替换本field。否则返回list。 + :return: + """ + new_contents = [] + for index, cell in enumerate(self.content): + try: + if isinstance(cell, list): + new_contents.append([float(value) for value in cell]) + else: + new_contents.append(float(cell)) + except Exception as e: + logger.error(f"Exception happens when process value in index {index}.") + raise e + return self._after_process(new_contents, inplace=inplace) - 1 如果元素类型(元素类型是指field中最里层元素的数据类型, 可以通过FieldArray.dtype查看，比如['This', 'is', ...]的元素类 - 型为str, [[1,2], ...]的元素类型为int)的数据不为数值类型则不会进行pad + def bool(self, inplace=True): + r""" + 将本field中的值调用bool(cell). 支持field中内容为以下两种情况(1)['1', '2', ...](即field中每个值为str的)， + (2) [['1', '2', ..], ['3', ..], ...](即field中每个值为一个list，list中的值会被依次转换。) - 2 如果元素类型为数值类型,比如np.int64, np.float64, int, float, torch.int64等 + :param inplace: 如果为True，则将新生成值替换本field。否则返回list。 + :return: + """ + new_contents = [] + for index, cell in enumerate(self.content): + try: + if isinstance(cell, list): + new_contents.append([bool(value) for value in cell]) + else: + new_contents.append(bool(cell)) + except Exception as e: + logger.error(f"Exception happens when process value in index {index}.") + raise e - 2.1 如果该field的内容为数值类型(包括int, float等)，比如为seq_len, 则不进行padding + return self._after_process(new_contents, inplace=inplace) - 2.2 如果该field的内容等价于一维list, 那么会将Batch中的List pad为一样长。 + def lower(self, inplace=True): + r""" + 将本field中的值调用cell.lower(). 支持field中内容为以下两种情况(1)['1', '2', ...](即field中每个值为str的)， + (2) [['1', '2', ..], ['3', ..], ...](即field中每个值为一个list，list中的值会被依次转换。) - 2.3 如果该field的内容等价于二维list，那么会按照英语character padding的方式进行padding。如果是character padding建议使用 - :class: fastNLP.EngChar2DPadder. + :param inplace: 如果为True，则将新生成值替换本field。否则返回list。 + :return: List[int], List[List[int]], self + """ + new_contents = [] + for index, cell in enumerate(self.content): + try: + if isinstance(cell, list): + new_contents.append([value.lower() for value in cell]) + else: + new_contents.append(cell.lower()) + except Exception as e: + logger.error(f"Exception happens when process value in index {index}.") + raise e + return self._after_process(new_contents, inplace=inplace) - 2.4 如果该field的内容等价于三维list，则如果每个instance在每个维度上相等，会组成一个batch的tensor返回，这种情况应该是为图片 - 的情况。 + def upper(self, inplace=True): + r""" + 将本field中的值调用cell.lower(). 支持field中内容为以下两种情况(1)['1', '2', ...](即field中每个值为str的)， + (2) [['1', '2', ..], ['3', ..], ...](即field中每个值为一个list，list中的值会被依次转换。) - 3 其它情况不进行处理，返回一个np.array类型。 - """ - - def __init__(self, pad_val=0): - super().__init__(pad_val=pad_val) - - def __call__(self, contents, field_name, field_ele_dtype, dim): - if field_ele_dtype: - if dim > 3: - return np.array(contents) - if isinstance(field_ele_dtype, type) and \ - (issubclass(field_ele_dtype, np.number) or issubclass(field_ele_dtype, Number)): - if dim == 0: - array = np.array(contents, dtype=field_ele_dtype) - elif dim == 1: - max_len = max(map(len, contents)) - array = np.full((len(contents), max_len), self.pad_val, dtype=field_ele_dtype) - for i, content_i in enumerate(contents): - array[i, :len(content_i)] = content_i - elif dim == 2: - max_len = max(map(len, contents)) - max_word_len = max([max([len(content_ii) for content_ii in content_i]) for - content_i in contents]) - array = np.full((len(contents), max_len, max_word_len), self.pad_val, dtype=field_ele_dtype) - for i, content_i in enumerate(contents): - for j, content_ii in enumerate(content_i): - array[i, j, :len(content_ii)] = content_ii - else: - shape = np.shape(contents) - if len(shape) == 4: # 说明各dimension是相同的大小 - array = np.array(contents, dtype=field_ele_dtype) - else: - raise RuntimeError( - f"Field:{field_name} has 3 dimensions, every sample should have the same shape.") - return array - elif str(field_ele_dtype).startswith('torch'): - if dim == 0: - tensor = torch.tensor(contents).to(field_ele_dtype) - elif dim == 1: - max_len = max(map(len, contents)) - tensor = torch.full((len(contents), max_len), fill_value=self.pad_val, dtype=field_ele_dtype) - for i, content_i in enumerate(contents): - tensor[i, :len(content_i)] = content_i.clone().detach() - elif dim == 2: - max_len = max(map(len, contents)) - max_word_len = max([max([len(content_ii) for content_ii in content_i]) for - content_i in contents]) - tensor = torch.full((len(contents), max_len, max_word_len), fill_value=self.pad_val, - dtype=field_ele_dtype) - for i, content_i in enumerate(contents): - for j, content_ii in enumerate(content_i): - tensor[i, j, :len(content_ii)] = content_ii.clone().detach() + :param inplace: 如果为True，则将新生成值替换本field。否则返回list。 + :return: List[int], List[List[int]], self + """ + new_contents = [] + for index, cell in enumerate(self.content): + try: + if isinstance(cell, list): + new_contents.append([value.upper() for value in cell]) else: - shapes = set([np.shape(content_i) for content_i in contents]) - if len(shapes) > 1: - raise RuntimeError( - f"Field:{field_name} has 3 dimensions, every sample should have the same shape.") - shape = shapes.pop() - if len(shape) == 3: - tensor = torch.full([len(contents)] + list(shape), fill_value=self.pad_val, - dtype=field_ele_dtype) - for i, content_i in enumerate(contents): - tensor[i] = content_i.clone().detach().to(field_ele_dtype) - else: - raise RuntimeError( - f"Field:{field_name} has 3 dimensions, every sample should have the same shape.") - return tensor - else: - return np.array(contents) # 不进行任何操作 - else: - return np.array(contents) + new_contents.append(cell.upper()) + except Exception as e: + logger.error(f"Exception happens when process value in index {index}.") + raise e + return self._after_process(new_contents, inplace=inplace) + def value_count(self): + r""" + 返回该field下不同value的数量。多用于统计label数量 -class EngChar2DPadder(Padder): - r""" - 用于为英语执行character级别的2D padding操作。对应的field内容应该类似[['T', 'h', 'i', 's'], ['a'], ['d', 'e', 'm', 'o']]， - 但这个Padder只能处理index为int的情况。 + :return: Counter, key是label，value是出现次数 + """ + count = Counter() - padded过后的batch内容，形状为(batch_size, max_sentence_length, max_word_length). max_sentence_length为这个batch中最大句 - 子长度；max_word_length为这个batch中最长的word的长度:: + def cum(cell): + if _is_iterable(cell) and not isinstance(cell, str): + for cell_ in cell: + cum(cell_) + else: + count[cell] += 1 - from fastNLP import DataSet - from fastNLP import EngChar2DPadder - from fastNLP import Vocabulary - dataset = DataSet({'sent': ['This is the first demo', 'This is the second demo']}) - dataset.apply(lambda ins:[list(word) for word in ins['sent'].split()], new_field_name='chars') - vocab = Vocabulary() - vocab.from_dataset(dataset, field_name='chars') - vocab.index_dataset(dataset, field_name='chars') - dataset.set_input('chars') - padder = EngChar2DPadder() - dataset.set_padder('chars', padder) # chars这个field的设置为了EnChar2DPadder + for cell in self.content: + cum(cell) + return count - """ - - def __init__(self, pad_val=0, pad_length=0): - r""" - :param pad_val: int, pad的位置使用该index - :param pad_length: int, 如果为0则取一个batch中最大的单词长度作为padding长度。如果为大于0的数，则将所有单词的长度 - 都pad或截取到该长度. - """ - super().__init__(pad_val=pad_val) - - self.pad_length = pad_length - - def __call__(self, contents, field_name, field_ele_dtype, dim): + def _after_process(self, new_contents, inplace): r""" - 期望输入类似于 - [ - [[0, 2], [2, 3, 4], ..], - [[9, 8, 2, 4], [1, 2,], ...], - .... - ] + 当调用处理函数之后，决定是否要替换field。 - :param contents: - :param field_name: - :param field_ele_dtype - :return: + :param new_contents: + :param inplace: + :return: self或者生成的content """ - if field_ele_dtype not in (np.int64, np.float64, int, float): - raise TypeError('dtype of Field:{} should be np.int64 or np.float64 to do 2D padding, get {}.'.format( - field_name, field_ele_dtype - )) - assert dim == 2, f"Field:{field_name} has {dim}, EngChar2DPadder only supports input with 2 dimensions." - if self.pad_length < 1: - max_char_length = max([max(len(char_lst) for char_lst in word_lst) for word_lst in contents]) + if inplace: + self.content = new_contents + try: + self.is_input = self.is_input + self.is_target = self.is_input + except SetInputOrTargetException as e: + logger.error("The newly generated field cannot be set as input or target.") + raise e + return self else: - max_char_length = self.pad_length - max_sent_length = max(len(word_lst) for word_lst in contents) - batch_size = len(contents) - dtype = type(contents[0][0][0]) - - padded_array = np.full((batch_size, max_sent_length, max_char_length), fill_value=self.pad_val, - dtype=dtype) - for b_idx, word_lst in enumerate(contents): - for c_idx, char_lst in enumerate(word_lst): - chars = char_lst[:max_char_length] - padded_array[b_idx, c_idx, :len(chars)] = chars - - return padded_array + return new_contents diff --git a/tests/core/test_dataset.py b/tests/core/test_dataset.py index e960dac7..d7c95a26 100644 --- a/tests/core/test_dataset.py +++ b/tests/core/test_dataset.py @@ -327,6 +327,23 @@ class TestDataSetMethods(unittest.TestCase): with self.assertRaises(RuntimeError): ds3 = ds1.concat(ds2, field_mapping={'X':'x'}) + def test_no_padder(self): + ds = DataSet() + ds.add_field('idx', [1, 2, 3], padder=None) + self.assertEqual(ds['idx'].padder, None) # should be None, but AutoPadder + + def test_copy_padder(self): + from fastNLP.core.field import AutoPadder + ds = DataSet() + ds.add_field('idx', [1, 2, 3]) + ds['idx'].set_padder(None) # workaround of problem 1 + ds.apply_field(lambda x: x, 'idx', 'idx') + self.assertEqual(ds['idx'].padder, None) # should be None, but AutoPadder + + ds = DataSet() + ds.add_field('idx', [1, 2, 3]) + ds.apply_field(lambda x: x, 'idx', 'idx') + self.assertTrue(isinstance(ds.get_field('idx').padder, AutoPadder)) # should be None, but AutoPadder class TestDataSetIter(unittest.TestCase): def test__repr__(self): diff --git a/tests/core/test_dist_trainer.py b/tests/core/test_dist_trainer.py index 4311277a..2f1408c8 100644 --- a/tests/core/test_dist_trainer.py +++ b/tests/core/test_dist_trainer.py @@ -1,4 +1,7 @@ import os +# have to add this, otherwise cannot import fastNLP when check_call() +import sys +sys.path.append(os.sep.join(os.path.abspath(__file__).split(os.sep)[:-3])) import shutil import subprocess import unittest