IBM Streams Python support¶
Python APIs for use with IBM® Streaming Analytics service on IBM Bluemix® cloud platform and on-premises IBM Streams.
Python Application API for Streams¶
Module that allows the definition and execution of streaming applications implemented in Python. Applications use Python code to process tuples and tuples are Python objects.
SPL operators may also be invoked from Python applications to allow use of existing IBM Streams toolkits.
See topology
Python functions as SPL operators¶
A Python function or class can be simply turned into an SPL primitive operator to allow tuple processing using Python in an SPL application.
SPL (Streams Processing Language) is a domain specific language for streaming analytics supported by Streams.
See streamsx.spl.spl
Streams Python REST API¶
Module that allows interaction with an running Streams instance or service through HTTPS REST APIs.
See streamsx.rest
Streams Python Setup¶
Streaming Analytics service¶
The service instance has Anaconda 4.1 installed with Python 3.5 as the runtime environment and has PYTHONHOME application environment variable pre-configured.
Any streaming applications using Python must use Python 3.5 when submitted to the service instance.
IBM Streams on-premises¶
For a distributed cluster running Streams Python 2.7 or Python 3.5 may be used.
Anaconda may be used as the Python runtime, Anaconda has the advantage of being pre-built and including a number of standard packages. Ananconda installs may be downloaded at: https://www.continuum.io/downloads .
Note
An Anaconda distribution for Python 2.7 or 3.5 must be used.
If building Python from source then it must be built to support embedding
of the runtime with shared libraries (--enabled-shared option to configure).
The Streams application environment variable PYTHONHOME must be set to the Python install path.
This is set using streamtool as:
streamtool setproperty --application-ev PYTHONHOME=path_to_python_install
The application environment variable may also be set using the Streams console. The Instance Management view has an Application Environment Variables section. Expanding the details for that section allows modification of the set of environment variables available to Streams applications.
The Python install path must be accessible on every application host that will execute Python code within a Streams application.
Contents: