A little more print debugging

scripts/run_cmd.py

 #!/usr/bin/env python
 # Copyright (c) 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 
 """Run a command and report its results in machine-readable format."""
 
 
 import collections
@@ skipping 154 matching lines @@
 
 
 def _launch_cmd(cmd):
   """Launch the given command. Non-blocking.
 
   Args:
       cmd: list of strings; command to run.
   Returns:
       subprocess.Popen instance.
   """
+  print ' '.join(cmd)

[epoger, 2014/03/13 17:42:45]

I would be tempted to 

print '_launch_cmd(): %s' % ' '.join(cmd)

   return subprocess.Popen(cmd, shell=False, stderr=subprocess.PIPE,
                           stdout=subprocess.PIPE)
 
 
 def _get_result(popen):
   """Get the results from a running process. Blocks until the process completes.
 
   Args:
       popen: subprocess.Popen instance.
   Returns:
@@ skipping 164 matching lines @@
     setattr(options, cmd, args)
   except IndexError:
     parser.print_usage()
     sys.exit(1)
   return options
 
 
 if '__main__' == __name__:
   parsed_args = parse_args()
   run(parsed_args.cmd).print_results(pretty=parsed_args.pretty)