47 lines
1.3 KiB
Cython
47 lines
1.3 KiB
Cython
"""Dataset abstractions for sequential data access. """
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cimport numpy as np
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cdef class SequentialDataset:
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cdef Py_ssize_t n_samples
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cdef void next(self, double **x_data_ptr, int **x_ind_ptr,
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int *nnz, double *y, double *sample_weight) nogil
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cdef void shuffle(self, seed)
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cdef class ArrayDataset(SequentialDataset):
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cdef Py_ssize_t n_features
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cdef int current_index
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cdef int stride
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cdef double *X_data_ptr
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cdef double *Y_data_ptr
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cdef np.ndarray feature_indices
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cdef int *feature_indices_ptr
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cdef np.ndarray index
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cdef int *index_data_ptr
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cdef double *sample_weight_data
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cdef void next(self, double **x_data_ptr, int **x_ind_ptr,
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int *nnz, double *y, double *sample_weight) nogil
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cdef void shuffle(self, seed)
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cdef class CSRDataset(SequentialDataset):
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cdef int current_index
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cdef int stride
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cdef double *X_data_ptr
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cdef int *X_indptr_ptr
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cdef int *X_indices_ptr
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cdef double *Y_data_ptr
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cdef np.ndarray feature_indices
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cdef int *feature_indices_ptr
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cdef np.ndarray index
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cdef int *index_data_ptr
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cdef double *sample_weight_data
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cdef void next(self, double **x_data_ptr, int **x_ind_ptr,
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int *nnz, double *y, double *sample_weight) nogil
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cdef void shuffle(self, seed)
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