=== Step 1: Use GstLAL in your python script ===

 * Include the following part in your python script to use GstLAL
{{{#!python
import sys
import gi
gi.require_version('Gst', '1.0')
from gi.repository import GObject, Gst
GObject.threads_init()
Gst.init(None)

from gstlal import pipeparts         as pp
from gstlal import calibration_parts as cp
from gstlal import simplehandler
from gstlal import datasource
}}}

 * Initialize your pipeline
{{{#!python
pipeline = Gst.Pipeline(name=pname)
mainloop = GObject.MainLoop()
handler  = simplehandler.Handler(mainloop, pipeline)
}}}

 * Put your pipeline description
{{{
...
}}}

 * Run your pipeline where you need to specify gps_start_time and gps_end_time
{{{#!python
print >>sys.stderr, "seeking GPS start and stop times ..."
if pipeline.set_state(Gst.State.READY) != Gst.StateChangeReturn.SUCCESS:
        raise RuntimeError("pipeline failed to enter READY state")
datasource.pipeline_seek_for_gps(pipeline, gps_start_time, gps_end_time)

print >>sys.stderr, "setting pipeline state to playing ..."
if pipeline.set_state(Gst.State.PLAYING) != Gst.StateChangeReturn.SUCCESS:
        raise RuntimeError("pipeline failed to enter PLAYING state")
else:
        print >>sys.stderr, "set to playing successfully"

print >>sys.stderr, "running pipeline ..."

mainloop.run()

if pipeline.set_state(Gst.State.NULL) != Gst.StateChangeReturn.SUCCESS:
        raise RuntimeError("pipeline could not be set to NULL")
}}}

 * [[KAGRA/Subgroups/CAL/GstLAL/tutorials/step2|(Next) Step 2: Dump lock flags from a frame cache file]]
 * [[KAGRA/Subgroups/CAL/GstLAL/tutorials/step0|(Prev) Step 0: Make a frame cache file]]
 * [[KAGRA/Subgroups/CAL/GstLAL/tutorials|Tutorials]]