EED Systems Group is working on upgrading the default Python instance in the LCLS production environment from Python 2.7.4 32-bit to Python 2.7.13 64-bit.
All Python applications in use in LCLS production must be tested and verified against the updated version before changing the default version of Python.
Testers must use the following environment settings to properly test their applications against Python 2.7.13:
Configuring LCLS production environment for testing:
Note
The following instructions assume that you are using the Bash shell, and that $LCLS_ROOT=/usr/local/lcls.
Add the new Python path to your environment:
export PYTHON_ROOT=${LCLS_ROOT}/package/python/python2.7.13/linux-x86_64- Add the new Python binaries to the PATH environment variable:
- Add the new Python libraries and their dependencies (EPICS R3-14-12 64-bit, Matlab2016b, etc.) to the LD_LIBRARY_PATH environment variable. This is to ensure that the new 64-bit versions of Python modules will work:
export LD_LIBRARY_PATH=${LCLS_ROOT}/matlab/2016b/extern/lib:${EPICS_BASE_RELEASE}/lib/linux-x86_64:${EPICS_EXTENSIONS}/lib/linux-x86_64:${EPICS_BASE_TOP}/base-cpp-R4-6-0/lib/linux-x86_64:${PYTHON_ROOT}/lib:${PYTHON_ROOT}/build/Python2.7.13/Lib:${LD_LIBRARY_PATH} - Clear the PYTHONPATH environment variable. This is to ensure that there are no false positives when testing applications, since PYTHONPATH may still have access to older versions of Python modules:
export PYTHONPATH= [Optional] If your application(s) import the "cx_Oracle" module, change/set your ORACLE_HOME environment variable to the following:
export ORACLE_HOME=${LCLS_ROOT}/package/oracle/product/11.2.0.2.0_x86_64/client_1[Optional] If your application(s) import "PyQt", "PyQwt", or any other Python modules that depend on Qt, add/change the following in your environment:
export QT_HOME=${LCLS_ROOT}/package/Qt/Qt-4.8.6/linux-x86_64export PATH=${QT_HOME}/bin:${PATH}export LD_LIBRARY_PATH=${QT_HOME}/lib:${LD_LIBRARY_PATH}