bindings/python/examples/sequence_test.py

   1 #!/usr/bin/env python3
   2 # sequence_test.py
   3 #
   4 # Babeltrace example script based on the Babeltrace API test script
   5 #
   6 # Copyright 2013 Xiaona Han
   7 # Copyright 2012 EfficiOS Inc.
   8 #
   9 # Author: Danny Serres <danny.serres@efficios.com>
  10 # Author: Xiaona Han <xiaonahappy13@163.com>
  11 #
  12 # Permission is hereby granted, free of charge, to any person obtaining a copy
  13 # of this software and associated documentation files (the "Software"), to deal
  14 # in the Software without restriction, including without limitation the rights
  15 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  16 # copies of the Software, and to permit persons to whom the Software is
  17 # furnished to do so, subject to the following conditions:
  18 #
  19 # The above copyright notice and this permission notice shall be included in
  20 # all copies or substantial portions of the Software.
  21 #
  22 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  23 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  24 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  25 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  26 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  27 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  28 # SOFTWARE.
  29
  30 # This example uses the babeltrace python module
  31 # to partially test the sequence API
  32
  33 import sys
  34 import babeltrace.reader
  35
  36
  37 # Check for path arg:
  38 if len(sys.argv) < 2:
  39     raise TypeError("Usage: sequence_test.py path/to/file")
  40
  41 # Create TraceCollection and add trace:
  42 traces = babeltrace.reader.TraceCollection()
  43 trace_handle = traces.add_trace(sys.argv[1], "ctf")
  44 if trace_handle is None:
  45     raise IOError("Error adding trace")
  46
  47 # Listing events
  48 print("--- Event list ---")
  49 for event_declaration in trace_handle.events:
  50     print("event : {}".format(event_declaration.name))
  51 print("--- Done ---")
  52
  53 for event in traces.events:
  54     print("TS: {}, {} : {}".format(event.timestamp,
  55                                    event.cycles, event.name))
  56
  57     try:
  58         sequence = event["seq_int_field"]
  59         print("int sequence values: {}". format(sequence))
  60     except KeyError:
  61         pass
  62
  63     try:
  64         sequence = event["seq_long_field"]
  65         print("long sequence values: {}". format(sequence))
  66     except KeyError:
  67         pass