PYTHONHOME

Toolkits > com.ibm.streamsx.topology 1.5.13.__dev__ > com.ibm.streamsx.topology.python > Executing applications using Python > PYTHONHOME

The location of Python at runtime is defined by the environment variable PYTHONHOME. The location at runtime can be different to the location used when compiling the Streams application containing Python code.

When running in a distributed instance PYTHONHOME should be set as an application environment variable. This can be set using the Instance Management capability of the IBM Streams Console or streamtool follows: 
streamtool setproperty --application-ev PYTHONHOME=/opt/anaconda3
When running standalone PYTHONHOME must be set in the user's environment. 
export PYTHONHOME=/opt/anaconda3

The application will use PYTHONHOME to locate the Python shared library as follows:

Python 3.5
  • $PYTHONHOME/lib/libpython3.5m.so
  • $PYTHONHOME/lib64/libpython3.5m.so if the path above does not exist.
Python 2.7
  • $PYTHONHOME/lib/libpython2.7.so
  • $PYTHONHOME/lib64/libpython2.7.so if the path above does not exist.