Fix lint errors in tracetools_analysis

tracetools_analysis/analysis/handler.py

@@ -1,6 +1,7 @@
 # Event handler
 
 import sys
+
 from . import lttng_models
 
 

tracetools_analysis/analysis/lttng_models.py

@@ -1,13 +1,17 @@
 # Model objects for LTTng traces/events
 
+
 def get_field(event, field_name, default=None):
     return event.get(field_name, default)
 
+
 def get_name(event):
     return get_field(event, '_name')
 
 
 class EventMetadata():
+    """Container for event metadata."""
+
     def __init__(self, event_name, pid, tid, timestamp, procname):
         self._event_name = event_name
         self._pid = pid

tracetools_analysis/analysis/ros_processor.py

@@ -1,8 +1,8 @@
 # Process trace events and create ROS model
 
-import sys
-from .lttng_models import get_field
 from .handler import EventHandler
+from .lttng_models import get_field
+
 
 def ros_process(events):
     """

tracetools_analysis/analysis/to_pandas.py

@@ -1,7 +1,7 @@
 # Convert processor object to pandas dataframe
 
 import pandas as pd
-from .ros_processor import RosProcessor
+
 
 def callback_durations_to_df(ros_processor):
     callback_addresses = []