[ https://issues.apache.org/jira/browse/ARROW-1999?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Uwe L. Korn reassigned ARROW-1999: ---------------------------------- Assignee: Jim Crist (was: Phillip Cloud) > [Python] from_numpy_dtype returns wrong types > --------------------------------------------- > > Key: ARROW-1999 > URL: https://issues.apache.org/jira/browse/ARROW-1999 > Project: Apache Arrow > Issue Type: Bug > Components: Python > Affects Versions: 0.8.0 > Environment: Windows 10 Build 15063.850 > Python: 3.6.3 > Numpy: 1.14.0 > Reporter: Victor Jimenez > Assignee: Jim Crist > Priority: Major > Labels: pull-request-available > Fix For: 0.9.0 > > > The following code shows multiple issues when using {{from_numpy_dtype}}: > {code} > import numpy as np > import pyarrow as pa > pa.from_numpy_dtype(np.unicode) # returns DataType(bool) > pa.from_numpy_dtype(np.int) # returns DataType(bool) > pa.from_numpy_dtype(np.int64) # Fails with the following message: > # > # ArrowNotImplementedError Traceback (most recent call last) > # <ipython-input-14-ca0855a7dda8> in <module>() > # ----> 1 pa.from_numpy_dtype(np.int64) > # 2 > # > # types.pxi in pyarrow.lib.from_numpy_dtype() > # > # error.pxi in pyarrow.lib.check_status() > # > # ArrowNotImplementedError: Unsupported numpy type 32760 > {code} > Additionally, a potentially related issue is also seen when using > {{to_pandas_dtype}}: > {code} > pa.DataType.to_pandas_dtype(pa.string()) # Returns numpy.object_ > # (shouldn't it be numpy.unicode?) > {code} -- This message was sent by Atlassian JIRA (v7.6.3#76005)