[2/4] trace: [tracetool,trivial] Style changes

diff --git a/scripts/tracetool/__init__.py b/scripts/tracetool/__init__.py
index 7f9161d..cca5072 100644
--- a/scripts/tracetool/__init__.py
+++ b/scripts/tracetool/__init__.py
@@ -144,7 +144,12 @@  class Event(object):
 
         unknown_props = set(self.properties) - self._VALID_PROPS
         if len(unknown_props) > 0:
-            raise ValueError("Unknown properties: %s" % ", ".join(unknown_props))
+            raise ValueError("Unknown properties: %s" %
+                             ", ".join(unknown_props))
+
+    def copy(other):
+        return Event(other.name, list(other.properties), other.fmt, other.args,
+                     other)
 
     @staticmethod
     def build(line_str):
@@ -197,7 +202,7 @@  class TracetoolError (Exception):
     pass
 
 
-def try_import(mod_name, attr_name = None, attr_default = None):
+def try_import(mod_name, attr_name=None, attr_default=None):
     """Try to import a module and get an attribute from it.
 
     Parameters
@@ -224,7 +229,7 @@  def try_import(mod_name, attr_name = None, attr_default = None):
 
 
 def generate(fevents, format, backend,
-             binary = None, probe_prefix = None):
+             binary=None, probe_prefix=None):
     """Generate the output for the given (format, backend) pair.
 
     Parameters
@@ -246,18 +251,18 @@  def generate(fevents, format, backend,
     format = str(format)
     if len(format) is 0:
         raise TracetoolError("format not set")
-    mformat = format.replace("-", "_")
-    if not tracetool.format.exists(mformat):
+    if not tracetool.format.exists(format):
         raise TracetoolError("unknown format: %s" % format)
+    format = format.replace("-", "_")
 
     backend = str(backend)
     if len(backend) is 0:
         raise TracetoolError("backend not set")
-    mbackend = backend.replace("-", "_")
-    if not tracetool.backend.exists(mbackend):
+    if not tracetool.backend.exists(backend):
         raise TracetoolError("unknown backend: %s" % backend)
+    backend = backend.replace("-", "_")
 
-    if not tracetool.backend.compatible(mbackend, mformat):
+    if not tracetool.backend.compatible(backend, format):
         raise TracetoolError("backend '%s' not compatible with format '%s'" %
                              (backend, format))
 
@@ -270,7 +275,7 @@  def generate(fevents, format, backend,
     if backend == "nop":
         ( e.properies.add("disable") for e in events )
 
-    tracetool.format.generate_begin(mformat, events)
+    tracetool.format.generate_begin(format, events)
     tracetool.backend.generate("nop", format,
                                [ e
                                  for e in events
@@ -279,4 +284,4 @@  def generate(fevents, format, backend,
                                [ e
                                  for e in events
                                  if "disable" not in e.properties ])
-    tracetool.format.generate_end(mformat, events)
+    tracetool.format.generate_end(format, events)
diff --git a/scripts/tracetool/backend/__init__.py b/scripts/tracetool/backend/__init__.py
index f0314ee..88f94fd 100644
--- a/scripts/tracetool/backend/__init__.py
+++ b/scripts/tracetool/backend/__init__.py
@@ -59,7 +59,7 @@  def get_list(only_public = False):
     for filename in os.listdir(tracetool.backend.__path__[0]):
         if filename.endswith('.py') and filename != '__init__.py':
             modnames.append(filename.rsplit('.', 1)[0])
-    for modname in modnames:
+    for modname in sorted(modnames):
         module = tracetool.try_import("tracetool.backend." + modname)
 
         # just in case; should never fail unless non-module files are put there
diff --git a/scripts/tracetool/format/__init__.py b/scripts/tracetool/format/__init__.py
index 3c2a0d8..577a224 100644
--- a/scripts/tracetool/format/__init__.py
+++ b/scripts/tracetool/format/__init__.py
@@ -53,7 +53,7 @@  def get_list():
     for filename in os.listdir(tracetool.format.__path__[0]):
         if filename.endswith('.py') and filename != '__init__.py':
             modnames.append(filename.rsplit('.', 1)[0])
-    for modname in modnames:
+    for modname in sorted(modnames):
         module = tracetool.try_import("tracetool.format." + modname)
 
         # just in case; should never fail unless non-module files are put there
diff --git a/scripts/tracetool/format/c.py b/scripts/tracetool/format/c.py
index 35555ae..930140b 100644
--- a/scripts/tracetool/format/c.py
+++ b/scripts/tracetool/format/c.py
@@ -2,11 +2,11 @@ 
 # -*- coding: utf-8 -*-
 
 """
-Generate .c file.
+trace/generated-tracers.c
 """
 
 __author__     = "Lluís Vilanova <vilanova@ac.upc.edu>"
-__copyright__  = "Copyright 2012, Lluís Vilanova <vilanova@ac.upc.edu>"
+__copyright__  = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
 __license__    = "GPL version 2 or (at your option) any later version"
 
 __maintainer__ = "Stefan Hajnoczi"
diff --git a/scripts/tracetool/format/d.py b/scripts/tracetool/format/d.py
index a2d5947..74ee0d3 100644
--- a/scripts/tracetool/format/d.py
+++ b/scripts/tracetool/format/d.py
@@ -2,11 +2,11 @@ 
 # -*- coding: utf-8 -*-
 
 """
-Generate .d file (DTrace only).
+trace/generated-tracers.dtrace (DTrace only).
 """
 
 __author__     = "Lluís Vilanova <vilanova@ac.upc.edu>"
-__copyright__  = "Copyright 2012, Lluís Vilanova <vilanova@ac.upc.edu>"
+__copyright__  = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
 __license__    = "GPL version 2 or (at your option) any later version"
 
 __maintainer__ = "Stefan Hajnoczi"
diff --git a/scripts/tracetool/format/events_c.py b/scripts/tracetool/format/events_c.py
index d670ec8..ea668ee 100644
--- a/scripts/tracetool/format/events_c.py
+++ b/scripts/tracetool/format/events_c.py
@@ -2,11 +2,11 @@ 
 # -*- coding: utf-8 -*-
 
 """
-Generate .c for event description.
+trace/generated-events.c
 """
 
 __author__     = "Lluís Vilanova <vilanova@ac.upc.edu>"
-__copyright__  = "Copyright 2012, Lluís Vilanova <vilanova@ac.upc.edu>"
+__copyright__  = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
 __license__    = "GPL version 2 or (at your option) any later version"
 
 __maintainer__ = "Stefan Hajnoczi"
diff --git a/scripts/tracetool/format/events_h.py b/scripts/tracetool/format/events_h.py
index d30ccea..f3febae 100644
--- a/scripts/tracetool/format/events_h.py
+++ b/scripts/tracetool/format/events_h.py
@@ -2,11 +2,11 @@ 
 # -*- coding: utf-8 -*-
 
 """
-Generate .h for event description.
+trace/generated-events.h
 """
 
 __author__     = "Lluís Vilanova <vilanova@ac.upc.edu>"
-__copyright__  = "Copyright 2012, Lluís Vilanova <vilanova@ac.upc.edu>"
+__copyright__  = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
 __license__    = "GPL version 2 or (at your option) any later version"
 
 __maintainer__ = "Stefan Hajnoczi"
diff --git a/scripts/tracetool/format/h.py b/scripts/tracetool/format/h.py
index 9b0903d..85f011f 100644
--- a/scripts/tracetool/format/h.py
+++ b/scripts/tracetool/format/h.py
@@ -2,7 +2,7 @@ 
 # -*- coding: utf-8 -*-
 
 """
-Generate .h file.
+trace/generated-tracers.h
 """
 
 __author__     = "Lluís Vilanova <vilanova@ac.upc.edu>"