Remove cursor, user and context instead use a Transaction

trytond/report/report.py

 #This file is part of Tryton.  The COPYRIGHT file at the top level of
 #this repository contains the full copyright notices and license terms.
 import copy
 import xml
 from xml import dom
 from xml.dom import minidom
 import sys
 import base64
 try:
     import cStringIO as StringIO
@@ skipping 97 matching lines @@
         action_report_obj = self.pool.get('ir.action.report')
         action_report_ids = action_report_obj.search([
             ('report_name', '=', self._name)
             ])
         if not action_report_ids:
             raise Exception('Error', 'Report (%s) not find!' % self._name)
         action_report = action_report_obj.browse(action_report_ids[0])
         objects = None
         if action_report.model:
             objects = self._get_objects(ids, action_report.model, datas)
-        type, data = self.parse(action_report, objects, datas)
+        type, data = self.parse(action_report, objects, datas, {})
         return (type, base64.encodestring(data), action_report.direct_print,
                 action_report.name)
 
     def _get_objects(self, ids, model, datas):
         model_obj = self.pool.get(model)
         return model_obj.browse(ids)
 
-    def parse(self, report, objects, datas, localcontext=None):
-        localcontext = localcontext or {}
+    def parse(self, report, objects, datas, localcontext):
+        '''
+        Parse the report.
+
+        :param report: a BrowseRecord of the ir.action.report
+        :param objects: a BrowseRecordList of the records on which parse report
+        :param datas: a dictionary with datas that will be set in local context
+            of the report
+        :param localcontext: the context used to parse the report
+        :return: a tuple with:
+            report type
+            report
+        '''
         localcontext['datas'] = datas
         localcontext['user'] = self.pool.get('res.user'
                 ).browse(Transaction().user)
         localcontext['formatLang'] = lambda *args, **kargs: \
                 self.format_lang(*args, **kargs)
         localcontext['decodestring'] = decodestring
         localcontext['StringIO'] = StringIO.StringIO
         localcontext['time'] = time
         localcontext['datetime'] = datetime
         localcontext['context'] = Transaction().context
@@ skipping 178 matching lines @@
                 date = datetime.datetime(*time.strptime(str(value),
                     string_pattern)[:6])
             else:
                 date = datetime.datetime(*(value.timetuple()[:6]))
             return lang_obj.strftime(date, code, locale_format)
         if currency:
             return lang_obj.currency(lang, value, currency, grouping=grouping,
                     symbol=symbol)
         return lang_obj.format(lang, '%.' + str(digits) + 'f', value,
                 grouping=grouping, monetary=monetary)