Inkscape debug extension: returns the number of command line arguments

myTest.inx

<?xml version="1.0" encoding="UTF-8"?>
<!-- file: myTest.inx -->
<!-- deps: myTest.py  -->
<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">

  <_name>MyTest</_name>
  <id>local/org.inkscape.debug.effect.myTest</id>

  <dependency type="executable" location="extensions">myTest.py</dependency>
  <dependency type="executable" location="extensions">inkex.py</dependency>

  <param name="instructions" type="description" xml:space="preserve">myTest</param>

  <effect needs-document="true" needs-live-preview="true">
    <object-type>all</object-type>
    <effects-menu hidden="false">
       <submenu _name="Debug" />
    </effects-menu>
  </effect>

  <script>
    <command reldir="extensions" interpreter="python">myTest.py</command>
  </script>

  <options silent="true"></options>

</inkscape-extension>

myTest.py

#!/usr/bin/env python 
"""
myTest - template Inkscape test extension 

Copyright (C) 2012 ~suv, suv-sf@users.sf.net

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
"""

# system library
from datetime import date
import sys

# local library
import inkex

try:
    inkex.localize()
except:
    inkex.errormsg("inkex.localize() failed.\n")
    import gettext
    _ = gettext.gettext

class testDebug(inkex.Effect):
    def __init__(self):
        inkex.Effect.__init__(self)

    def effect(self):
        today = date.today()
        inkex.errormsg(_("Today is %s" % today))
        inkex.errormsg(_("Number of selected objects: %s" % len(self.selected)))
        inkex.errormsg(_("Length of list of command line arguments passed to Python script: %s" % len(sys.argv)))
        # for ele in sys.argv:
        #     inkex.debug(ele)

if __name__ == '__main__':
    e = testDebug()
    e.affect()

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