Hi Carlos,

Oh, you mean "sys.flags.debug" value?
This field is "read only" and cannot be changed from Python script, I guess.
  https://docs.python.org/3.6/library/sys.html#sys.flags

If you want to enable this flag, you need to pass "-d" option to python 
interpreter when running
ryu-manager;

$ python -d ./bin/ryu-manager

Or modify the shebang line of ryu-manager;

$ git diff
diff --git a/bin/ryu-manager b/bin/ryu-manager
index 28979a1..d71b231 100755
--- a/bin/ryu-manager
+++ b/bin/ryu-manager
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python -d

 # Copyright (C) 2011, 2012 Nippon Telegraph and Telephone Corporation.
 #


Thanks,
Iwase


On 2017年10月19日 09:47, Carlos Ferreira wrote:
Yes, I have tried. The sys.flags.debug value remained False.

In the meanwhile, I modified my code to be able to start the
controller in a different way.

Thank you for the support.
Carlos


On 19 October 2017 at 00:46, Iwase Yusuke <iwase.yusu...@gmail.com> wrote:
Hi Carlos,

Have you tried "--enable-debugger" option?

$ ryu-manager --help
...(snip)...
   --enable-debugger     don't overwrite Python standard threading
library(use
                         only for debugging)
...(snip)...

Thanks,
Iwase



On 2017年10月18日 23:32, Carlos Ferreira wrote:

Hello to all

I need to enable the Python interpreter Debug flag (-D)
How can I do it when calling ryu-manager?

Thank you.

Carlos Ferreira


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