コード例 #1
0
ファイル: series.py プロジェクト: surfer1-dev/pandas
    def __init__(self,
                 data=None,
                 index=None,
                 sparse_index=None,
                 kind='block',
                 fill_value=None,
                 name=None,
                 dtype=None,
                 copy=False,
                 fastpath=False):

        # we are called internally, so short-circuit
        if fastpath:

            # data is an ndarray, index is defined

            if not isinstance(data, SingleBlockManager):
                data = SingleBlockManager(data, index, fastpath=True)
            if copy:
                data = data.copy()

        else:

            if data is None:
                data = []

            if isinstance(data, Series) and name is None:
                name = data.name

            is_sparse_array = isinstance(data, SparseArray)
            if fill_value is None:
                if is_sparse_array:
                    fill_value = data.fill_value
                else:
                    fill_value = np.nan

            if is_sparse_array:
                if isinstance(data, SparseSeries) and index is None:
                    index = data.index.view()
                elif index is not None:
                    assert (len(index) == len(data))

                sparse_index = data.sp_index
                data = np.asarray(data)

            elif isinstance(data, SparseSeries):
                if index is None:
                    index = data.index.view()

                # extract the SingleBlockManager
                data = data._data

            elif isinstance(data, (Series, dict)):
                if index is None:
                    index = data.index.view()

                data = Series(data)
                data, sparse_index = make_sparse(data,
                                                 kind=kind,
                                                 fill_value=fill_value)

            elif isinstance(data, (tuple, list, np.ndarray)):
                # array-like
                if sparse_index is None:
                    data, sparse_index = make_sparse(data,
                                                     kind=kind,
                                                     fill_value=fill_value)
                else:
                    assert (len(data) == sparse_index.npoints)

            elif isinstance(data, SingleBlockManager):
                if dtype is not None:
                    data = data.astype(dtype)
                if index is None:
                    index = data.index.view()
                else:

                    data = data.reindex(index, copy=False)

            else:
                length = len(index)

                if data == fill_value or (isnull(data) and isnull(fill_value)):
                    if kind == 'block':
                        sparse_index = BlockIndex(length, [], [])
                    else:
                        sparse_index = IntIndex(length, [])
                    data = np.array([])

                else:
                    if kind == 'block':
                        locs, lens = ([0], [length]) if length else ([], [])
                        sparse_index = BlockIndex(length, locs, lens)
                    else:
                        sparse_index = IntIndex(length, index)
                    v = data
                    data = np.empty(length)
                    data.fill(v)

            if index is None:
                index = com._default_index(sparse_index.length)
            index = _ensure_index(index)

            # create/copy the manager
            if isinstance(data, SingleBlockManager):

                if copy:
                    data = data.copy()
            else:

                # create a sparse array
                if not isinstance(data, SparseArray):
                    data = SparseArray(data,
                                       sparse_index=sparse_index,
                                       fill_value=fill_value,
                                       dtype=dtype,
                                       copy=copy)

                data = SingleBlockManager(data, index)

        generic.NDFrame.__init__(self, data)

        self.index = index
        self.name = name
コード例 #2
0
ファイル: series.py プロジェクト: ricarpor/pandas
    def __new__(cls, data, index=None, sparse_index=None, kind="block", fill_value=None, name=None, copy=False):

        is_sparse_array = isinstance(data, SparseArray)
        if fill_value is None:
            if is_sparse_array:
                fill_value = data.fill_value
            else:
                fill_value = nan

        if is_sparse_array:
            if isinstance(data, SparseSeries) and index is None:
                index = data.index
            elif index is not None:
                assert len(index) == len(data)

            sparse_index = data.sp_index
            values = np.asarray(data)
        elif isinstance(data, (Series, dict)):
            if index is None:
                index = data.index

            data = Series(data)
            values, sparse_index = make_sparse(data, kind=kind, fill_value=fill_value)
        elif np.isscalar(data):  # pragma: no cover
            if index is None:
                raise Exception("must pass index!")

            values = np.empty(len(index))
            values.fill(data)

            # TODO: more efficient

            values, sparse_index = make_sparse(values, kind=kind, fill_value=fill_value)

        else:
            # array-like
            if sparse_index is None:
                values, sparse_index = make_sparse(data, kind=kind, fill_value=fill_value)
            else:
                values = data
                assert len(values) == sparse_index.npoints

        if index is None:
            index = Index(np.arange(sparse_index.length))
        index = _ensure_index(index)

        # Create array, do *not* copy data by default
        if copy:
            subarr = np.array(values, dtype=np.float64, copy=True)
        else:
            subarr = np.asarray(values, dtype=np.float64)

        if index.is_all_dates:
            cls = SparseTimeSeries

        # Change the class of the array to be the subclass type.
        output = subarr.view(cls)
        output.sp_index = sparse_index
        output.fill_value = np.float64(fill_value)
        output.index = index
        output.name = name
        return output
コード例 #3
0
    def __new__(cls,
                data,
                index=None,
                sparse_index=None,
                kind='block',
                fill_value=None,
                name=None,
                copy=False):

        is_sparse_array = isinstance(data, SparseArray)
        if fill_value is None:
            if is_sparse_array:
                fill_value = data.fill_value
            else:
                fill_value = nan

        if is_sparse_array:
            if isinstance(data, SparseSeries) and index is None:
                index = data.index
            elif index is not None:
                assert (len(index) == len(data))

            sparse_index = data.sp_index
            values = np.asarray(data)
        elif isinstance(data, (Series, dict)):
            if index is None:
                index = data.index

            data = Series(data)
            values, sparse_index = make_sparse(data,
                                               kind=kind,
                                               fill_value=fill_value)
        elif np.isscalar(data):  # pragma: no cover
            if index is None:
                raise Exception('must pass index!')

            values = np.empty(len(index))
            values.fill(data)

            # TODO: more efficient

            values, sparse_index = make_sparse(values,
                                               kind=kind,
                                               fill_value=fill_value)

        else:
            # array-like
            if sparse_index is None:
                values, sparse_index = make_sparse(data,
                                                   kind=kind,
                                                   fill_value=fill_value)
            else:
                values = data
                assert (len(values) == sparse_index.npoints)

        if index is None:
            index = Index(np.arange(sparse_index.length))
        index = _ensure_index(index)

        # Create array, do *not* copy data by default
        if copy:
            subarr = np.array(values, dtype=np.float64, copy=True)
        else:
            subarr = np.asarray(values, dtype=np.float64)

        if index.is_all_dates:
            cls = SparseTimeSeries

        # Change the class of the array to be the subclass type.
        output = subarr.view(cls)
        output.sp_index = sparse_index
        output.fill_value = np.float64(fill_value)
        output.index = index
        output.name = name
        return output
コード例 #4
0
ファイル: series.py プロジェクト: 5i7788/pandas
    def __init__(self, data, index=None, sparse_index=None, kind='block',
                 fill_value=None, name=None, dtype=None, copy=False,
                 fastpath=False):

        # we are called internally, so short-circuit
        if fastpath:

            # data is an ndarray, index is defined
            data = SingleBlockManager(data, index, fastpath=True)
            if copy:
                data = data.copy()
        else:

            is_sparse_array = isinstance(data, SparseArray)
            if fill_value is None:
                if is_sparse_array:
                    fill_value = data.fill_value
                else:
                    fill_value = nan

            if is_sparse_array:
                if isinstance(data, SparseSeries) and index is None:
                    index = data.index.view()
                elif index is not None:
                    assert(len(index) == len(data))

                sparse_index = data.sp_index
                data = np.asarray(data)

            elif isinstance(data, SparseSeries):
                if index is None:
                    index = data.index.view()

                # extract the SingleBlockManager
                data = data._data

            elif isinstance(data, (Series, dict)):
                if index is None:
                    index = data.index.view()

                data = Series(data)
                data, sparse_index = make_sparse(data, kind=kind,
                                                 fill_value=fill_value)

            elif isinstance(data, (tuple, list, np.ndarray)):
                # array-like
                if sparse_index is None:
                    data, sparse_index = make_sparse(data, kind=kind,
                                                     fill_value=fill_value)
                else:
                    assert(len(data) == sparse_index.npoints)

            elif isinstance(data, SingleBlockManager):
                if dtype is not None:
                    data = data.astype(dtype)
                if index is None:
                    index = data.index.view()
                else:
                    data = data.reindex(index, copy=False)

            else:

                length = len(index)

                if data == fill_value or (isnull(data)
                                          and isnull(fill_value)):
                    if kind == 'block':
                        sparse_index = BlockIndex(length, [], [])
                    else:
                        sparse_index = IntIndex(length, [])
                    data = np.array([])

                else:
                    if kind == 'block':
                        locs, lens = ([0], [length]) if length else ([], [])
                        sparse_index = BlockIndex(length, locs, lens)
                    else:
                        sparse_index = IntIndex(length, index)
                    v = data
                    data = np.empty(length)
                    data.fill(v)

            if index is None:
                index = com._default_index(sparse_index.length)
            index = _ensure_index(index)

            # create/copy the manager
            if isinstance(data, SingleBlockManager):

                if copy:
                    data = data.copy()
            else:

                # create a sparse array
                if not isinstance(data, SparseArray):
                    data = SparseArray(
                        data, sparse_index=sparse_index, fill_value=fill_value, dtype=dtype, copy=copy)

                data = SingleBlockManager(data, index)

        generic.NDFrame.__init__(self, data)

        self.index = index
        self.name = name
コード例 #5
0
    def __new__(cls, data, index=None, sparse_index=None, kind='block',
                fill_value=None, name=None, copy=False):

        is_sparse_array = isinstance(data, SparseArray)
        if fill_value is None:
            if is_sparse_array:
                fill_value = data.fill_value
            else:
                fill_value = nan

        if is_sparse_array:
            if isinstance(data, SparseSeries) and index is None:
                index = data.index
            elif index is not None:
                assert(len(index) == len(data))

            sparse_index = data.sp_index
            values = np.asarray(data)
        elif isinstance(data, (Series, dict)):
            if index is None:
                index = data.index

            data = Series(data)
            values, sparse_index = make_sparse(data, kind=kind,
                                               fill_value=fill_value)
        elif isinstance(data, (tuple, list, np.ndarray)):
            # array-like
            if sparse_index is None:
                values, sparse_index = make_sparse(data, kind=kind,
                                                   fill_value=fill_value)
            else:
                values = data
                assert(len(values) == sparse_index.npoints)
        else:
            if index is None:
                raise Exception('must pass index!')

            length = len(index)

            if data == fill_value or (isnull(data)
                    and isnull(fill_value)):
                if kind == 'block':
                    sparse_index = BlockIndex(length, [], [])
                else:
                    sparse_index = IntIndex(length, [])
                values = np.array([])
            else:
                if kind == 'block':
                    locs, lens = ([0], [length]) if length else ([], [])
                    sparse_index = BlockIndex(length, locs, lens)
                else:
                    sparse_index = IntIndex(length, index)
                values = np.empty(length)
                values.fill(data)

        if index is None:
            index = com._default_index(sparse_index.length)
        index = _ensure_index(index)

        # Create array, do *not* copy data by default
        if copy:
            subarr = np.array(values, dtype=np.float64, copy=True)
        else:
            subarr = np.asarray(values, dtype=np.float64)

        if index.is_all_dates:
            cls = SparseTimeSeries

        # Change the class of the array to be the subclass type.
        output = subarr.view(cls)
        output.sp_index = sparse_index
        output.fill_value = np.float64(fill_value)
        output.index = index
        output.name = name
        return output