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54 lines
1.6 KiB
54 lines
1.6 KiB
""" orc compat """
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from __future__ import annotations
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from typing import TYPE_CHECKING
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from pandas._typing import (
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FilePath,
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ReadBuffer,
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)
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from pandas.compat._optional import import_optional_dependency
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from pandas.io.common import get_handle
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if TYPE_CHECKING:
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from pandas import DataFrame
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def read_orc(
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path: FilePath | ReadBuffer[bytes], columns: list[str] | None = None, **kwargs
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) -> DataFrame:
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"""
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Load an ORC object from the file path, returning a DataFrame.
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.. versionadded:: 1.0.0
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Parameters
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----------
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path : str, path object, or file-like object
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String, path object (implementing ``os.PathLike[str]``), or file-like
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object implementing a binary ``read()`` function. The string could be a URL.
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Valid URL schemes include http, ftp, s3, and file. For file URLs, a host is
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expected. A local file could be:
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``file://localhost/path/to/table.orc``.
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columns : list, default None
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If not None, only these columns will be read from the file.
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**kwargs
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Any additional kwargs are passed to pyarrow.
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Returns
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-------
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DataFrame
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Notes
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-------
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Before using this function you should read the :ref:`user guide about ORC <io.orc>`
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and :ref:`install optional dependencies <install.warn_orc>`.
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"""
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# we require a newer version of pyarrow than we support for parquet
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orc = import_optional_dependency("pyarrow.orc")
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with get_handle(path, "rb", is_text=False) as handles:
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orc_file = orc.ORCFile(handles.handle)
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return orc_file.read(columns=columns, **kwargs).to_pandas()
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