error importing Pandas in python-3.4 unix environment - undefined symbol: pyobject_cmp #10608
Description
I was using Pandas version 0.16.1 on a Red Hat Enterprise Linux Server release 6.6 system and it was working fine but I wanted to update Pandas to version 0.16.2 so I uninstalled it and reinstalled it using
pip uninstall pandas pip install pandas The installation seemed to work fine. However, when I attempt to import pandas
import pandas I get the error:
Traceback (most recent call last): File "path_to_python/python3.4/site-packages/pandas/__init__.py", line 7, in <module> from pandas import hashtable, tslib, lib ImportError: path_to_python/python3.4/site-packages/pandas/hashtable.cpython-34m.so: undefined symbol: pyobject_cmp During handling of the above exception, another exception occurred: Traceback (most recent call last): File "<stdin>", line 1, in <module> File "path_to_python/python3.4/site-packages/pandas/__init__.py", line 13, in <module> "extensions first.".format(module)) ImportError: C extension: path_to_python/python3.4/site-packages/pandas/hashtable.cpython-34m.so: undefined symbol: pyobject_cmp not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace' to build the C extensions first. However:
cd path_to_python/python3.4/site-packages/pandas/ python setup.py build_ext --inplace doesn't work either as there is no setup.py to be found. The error is:
Fatal Python error: Py_Initialize: can't initialize sys standard streams AttributeError: 'module' object has no attribute 'OpenWrapper' Aborted (core dumped) I also tried to install Pandas by downloading the source and then:
python setup.py install python setup.py build_ext --inplace This time the second command generated a lot of output and successfully completed. However, I still get the same error when I try to import pandas