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https://issues.apache.org/jira/browse/ARROW-5910?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated ARROW-5910:
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Labels: pull-request-available (was: )
> [Python] read_tensor() fails on non-seekable streams
> ----------------------------------------------------
>
> Key: ARROW-5910
> URL: https://issues.apache.org/jira/browse/ARROW-5910
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Affects Versions: 0.13.0
> Environment: pyarrow installed via pip, pyarrow==0.13.0
> Reporter: Karsten Krispin
> Assignee: Wes McKinney
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.15.0
>
>
> when reading a tensor from from a compressed pyarrow stream, it fails with
> {code:java}
> Traceback (most recent call last):
> File "test.py", line 10, in <module>
> tensor = pa.read_tensor(in_stream)
> File "pyarrow/ipc.pxi", line 470, in pyarrow.lib.read_tensor
> File "pyarrow/io.pxi", line 153, in
> pyarrow.lib.NativeFile.get_random_access_file
> File "pyarrow/io.pxi", line 182, in pyarrow.lib.NativeFile._assert_seekable
> OSError: only valid on seekable files{code}
> example code:
> {code:java}
> import pyarrow as pa
> import numpy as np
> a = np.random.random(size = (100,110,3) )
> out_stream = pa.output_stream('test.pa', compression='gzip', buffer_size=None)
> pa.write_tensor(pa.Tensor.from_numpy(a), out_stream)
> in_stream = pa.input_stream('test.pa', compression='gzip', buffer_size=None)
> tensor = pa.read_tensor(in_stream)
> b = pa.Tensor.to_numpy(tensor){code}
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