how to access module level variable in class

[nil111181]

import smtplib
import mimetypes;
from optparse import OptionParser;
from email import Encoders;
from email.Message import Message;
from email.MIMEBase import MIMEBase;
from email.MIMEMultipart import MIMEMultipart;
from email.MIMEText import MIMEText;
 
from StringIO  import StringIO
 
mail_server_not_specify_form='''<?xml version="1.0"?>
<form string="SMTP Mail Server Error!">
    <separator string="Required Mail-Server!!!" colspan="4"/>
    <label string="Mail-Server Configuration Required" colspan="4"/>
</form>''';
 
error_form = '''<?xml version="1.0"?>
<form string="SMTP Mail Server Error!">
    <separator string="Required Mail-Server!!!" colspan="4"/>
    <label string="%s" colspan="4"/>
</form>'''
 
class wiz_latepayment(wizard.interface):
    def __init__(self,name):
        self.error_message = '';
        super(wiz_latepayment,self).__init__(name)
 
    def _send_reminder(self, cr, uid, data, context):
#        print "In send reminder ::",
        this_obj = pooler.get_pool(cr.dbname).get('position.reminder').read(cr,uid,data['ids'])[0];
        send_currier_ids = pooler.get_pool(cr.dbname).get('position.reminder.line').search(cr,uid,[('reminder_id','=',this_obj['id']),('states','=','gen')])
        reminder_lines = pooler.get_pool(cr.dbname).get('position.reminder.line').browse(cr,uid,send_currier_ids);
 
        canal = False
#        print "Reminder Linses ::",reminder_lines
        for reminder_line in reminder_lines:
            try:
                if reminder_line.send_by_email == 'yes' and not this_obj['smtp_id']:
                    return 'mailservernotgivan';
                #end if reminder_line.send_by_email == 'yes' and not this_obj['smtp_id']:
 
                ret_create_report = self._create_report(cr, uid, reminder_line)
#                print "After create report ::",ret_create_report
                if not ret_create_report[0]:
                    raise ret_create_report[1]
                #end if not ret_create_report[0]:
 
                if reminder_line.send_by_email == 'yes':
                    ret_get_email = self._get_email(cr, uid, reminder_line)
#                    print "After get email ::",ret_get_email
                    if ret_get_email[0]:
                        body_message = self._get_body_message(reminder_line)
                        ret_send_mail = self._send_mail(cr, uid, this_obj['smtp_id'][0], ret_get_email[1], ret_create_report[1], body_message)
                        if not ret_send_mail[0]:
                            raise ret_send_mail[1]
                        else:
                            canal = 'E-mail'
                        #end if not ret_send_mail[0]:
                    #end if ret_get_email[0]:
                #end if reminder_line.send_by_email == 'yes':
                if reminder_line.send_by_currier == 'yes':
                    if canal:
                        canal = 'Currier&E-mail'
                    else:
                        canal = 'Currier'
                #end if reminder_line.send_by_currier == 'yes':
 
                if canal:
                    self._create_crm_case(cr, uid, canal, 'Normal Reminder', reminder_line,ret_create_report[1])
                    reminder_line.write(cr,uid,[reminder_line.id],{'states':'sent'})
                #end if canal:
                #DELETE FILE AFTER USE
                if os.path.exists(ret_create_report[1]):
                    os.remove(ret_create_report[1]);
                #End if os.path.exists(file_name):
            except Exception,e:
                print "Exception e :",e
                if not self.error_message:
                    self.error_message = e.__str__() + '\n'
                else:
                    self.error_message = self.error_message + e.__str__() + '\n'
                pass
        if self.error_message:
            error_form = error_form % self.error_message
            return 'errorform'
 
        return 'printflag';
    #end def _send_reminder(self, cr, uid, data, context):
 

and i want to set the value of the %s by value of error_message and show it in the last as

 states = {
 
            'init': {
                         'actions': [],
                        'result': {'type':'choice', 'next_state': _send_reminder},
                     },
             'printflag':{
                           'actions': [],
                        'result': {'type':'print', 'report':'position.reminder.report', 'state':'end'}
                          },
             'errorform':{
                           'actions': [],
                            'result': {'type':'form', 'arch': str(error_form.buf), 'fields':{},'state':[('printflag','OK')]}
                          },
              'mailservernotgivan': {
                            'actions': [],
                            'result': {'type':'form', 'arch':mail_server_not_specify_form, 'fields':{}, 'state':[('end','OK')]}
                            },
             }
 
 

and states is class level variable so how can i set the value

[bartonc]

I wish that I got credit for every time I add [code] tags.