[jira] [Created] (ARROW-8851) Fix FutureWarnings in Python Plasma docs

["Weston Steimel (Jira)" <ji...@apache.org>]

Weston Steimel created ARROW-8851:
-------------------------------------

             Summary: Fix FutureWarnings in Python Plasma docs
                 Key: ARROW-8851
                 URL: https://issues.apache.org/jira/browse/ARROW-8851
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Documentation, Python
    Affects Versions: 0.17.0
            Reporter: Weston Steimel


The documentation for Plasma in Python at [https://arrow.apache.org/docs/python/plasma.html] produces several FutureWarning messages for pyarrow.get_tensor_size, pyarrow.read_tensor and pyarrow.write_tensor

In [9]: import numpy as np 
 : import pyarrow as pa 
 : 
 : # Create a pyarrow.Tensor object from a numpy random 2-dimensional array 
 : data = np.random.randn(10, 4) 
 : tensor = pa.Tensor.from_numpy(data) 
 : 
 : # Create the object in Plasma 
 : object_id = plasma.ObjectID(np.random.bytes(20)) 
 : data_size = pa.get_tensor_size(tensor) 
 : buf = client.create(object_id, data_size) 
 /usr/local/lib/python3.8/site-packages/pyarrow/util.py:39: FutureWarning: pyarrow.get_tensor_size is deprecated as of 0.17.0, please use pyarrow.ipc.get_tensor_size instead
 warnings.warn(msg, FutureWarning)

In [10]: # Write the tensor into the Plasma-allocated buffer 
 : stream = pa.FixedSizeBufferWriter(buf) 
 : pa.write_tensor(tensor, stream) # Writes tensor's 552 bytes to Plasma stream 
 /usr/local/lib/python3.8/site-packages/pyarrow/util.py:39: FutureWarning: pyarrow.write_tensor is deprecated as of 0.17.0, please use pyarrow.ipc.write_tensor instead
 warnings.warn(msg, FutureWarning)

In [13]: # Reconstruct the Arrow tensor object. 
 : reader = pa.BufferReader(buf2) 
 : tensor2 = pa.read_tensor(reader) 
 /usr/local/lib/python3.8/site-packages/pyarrow/util.py:39: FutureWarning: pyarrow.read_tensor is deprecated as of 0.17.0, please use pyarrow.ipc.read_tensor instead
 warnings.warn(msg, FutureWarning)



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