34 lines
1.1 KiB
Cython
34 lines
1.1 KiB
Cython
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import numpy as np
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cimport numpy as cnp
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cnp.import_array()
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from pandas._libs.util cimport is_array
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cdef cnp.dtype _dtype_obj = np.dtype("object")
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cpdef check_result_array(object obj, object dtype):
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# Our operation is supposed to be an aggregation/reduction. If
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# it returns an ndarray, this likely means an invalid operation has
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# been passed. See test_apply_without_aggregation, test_agg_must_agg
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if is_array(obj):
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if dtype != _dtype_obj:
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# If it is object dtype, the function can be a reduction/aggregation
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# and still return an ndarray e.g. test_agg_over_numpy_arrays
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raise ValueError("Must produce aggregated value")
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cpdef inline extract_result(object res):
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""" extract the result object, it might be a 0-dim ndarray
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or a len-1 0-dim, or a scalar """
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if hasattr(res, "_values"):
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# Preserve EA
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res = res._values
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if res.ndim == 1 and len(res) == 1:
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# see test_agg_lambda_with_timezone, test_resampler_grouper.py::test_apply
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res = res[0]
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return res
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