[web2py] web2py last update from sources error: No module named simplejson.scanner

[salbefe]

I have downloaded last updates form
Hello,

I have downloaded last updates from the mercurial repository and when
I try to execute web2py :

>> python web2py.py

I get the following error:

ImportError: No module named simplejson.scanner
File "C:\web2py\web2py.py", line 16, in <module>
  import gluon.widget
File "C:\web2py\gluon\widget.py", line 24, in <module>
  import main
File "C:\web2py\gluon\main.py", line 68, in <module>
  from globals import Request, Response, Session
File "C:\web2py\gluon\globals.py", line 25, in <module>
  from serializers import json, custom_json
File "C:\web2py\gluon\serializers.py", line 9, in <module>
  import contrib.simplejson as simplejson
File "C:\web2py\gluon\contrib\simplejson\__init__.py", line 111, in
<module>
  from decoder import JSONDecoder, JSONDecodeError
File "C:\web2py\gluon\contrib\simplejson\decoder.py", line 7, in
<module>
  from simplejson.scanner import make_scanner