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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/05/18 23:25:39 UTC

[GitHub] [arrow] alexdesiqueira commented on a diff in pull request #13144: ARROW-16356: [Python] Expose RandomAccessFile::GetStream

alexdesiqueira commented on code in PR #13144:
URL: https://github.com/apache/arrow/pull/13144#discussion_r876456543


##########
python/pyarrow/tests/test_io.py:
##########
@@ -125,6 +125,22 @@ def test_python_file_read():
         pa.PythonFile(StringIO(), mode='r')
 
 
+def test_python_file_get_stream():
+    data = b'data1data2data3data4data5'
+
+    buf = BytesIO(data)
+    f = pa.PythonFile(buf, mode='r')
+
+    stream1 = f.get_stream(file_offset=0, nbytes=10)
+    stream2 = f.get_stream(file_offset=9, nbytes=16)
+
+    buf_nbytes6 = stream1.read(nbytes=6)
+    assert buf_nbytes6 == b'data1d'

Review Comment:
   Got it. I'll get back to that. Thanks!



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