Python bindings: Make examples PEP8 compliant

[babeltrace.git] / bindings / python / examples / example-api-test.py

#!/usr/bin/env python3
# example_api_test.py
#
# Babeltrace example script based on the Babeltrace API test script
#
# Copyright 2012 EfficiOS Inc.
#
# Author: Danny Serres <danny.serres@efficios.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.

# This example uses the babeltrace python module
# to partially test the api.

import sys
from babeltrace import *

# Check for path arg:
if len(sys.argv) < 2:
    raise TypeError("Usage: python example-api-test.py path/to/file")

# Create TraceCollection and add trace:
traces = TraceCollection()
trace_handle = traces.add_trace(sys.argv[1], "ctf")
if trace_handle is None:
    raise IOError("Error adding trace")

# Listing events
print("--- Event list ---")
for event_declaration in trace_handle.events:
    print("event : {}".format(event_declaration.name))
    if event_declaration.name == "sched_switch":
        for field_declaration in event_declaration.fields:
            print(field_declaration)
print("--- Done ---")

for event in traces.events:
    print("TS: {}, {} : {}".format(event.timestamp, event.cycles, event.name))

    if event.name == "sched_switch":
        prev_comm = event["prev_comm"]
        if prev_comm is None:
            print("ERROR: Missing prev_comm context info")
        else:
            print("sched_switch prev_comm: {}".format(prev_comm))

    if event.name == "exit_syscall":
        ret_code = event["ret"]
        if ret_code is None:
            print("ERROR: Unable to extract ret")
        else:
            print("exit_syscall ret: {}".format(ret_code))