Working calculator

courseware/calc.py

@@ -4,7 +4,7 @@ from pyparsing import Word, alphas, nums, oneOf, Literal
 from pyparsing import ZeroOrMore, OneOrMore, StringStart
 from pyparsing import StringEnd, Optional, Forward
 from pyparsing import CaselessLiteral, Group, StringEnd
-from pyparsing import NoMatch
+from pyparsing import NoMatch, stringEnd
 
 
 def evaluator(variables, functions, string):
@@ -105,7 +105,7 @@ def evaluator(variables, functions, string):
     term = term.setParseAction(prod_parse_action)
     expr << Optional((plus|minus)) + term + ZeroOrMore((plus|minus)+term)
     expr=expr.setParseAction(sum_parse_action)
-    return expr.parseString(string)[0]
+    return (expr+stringEnd).parseString(string)[0]
 
 if __name__=='__main__':
     variables={'R1':2.0, 'R3':4.0}
@@ -117,4 +117,4 @@ if __name__=='__main__':
     print evaluator({'a': 2.2997471478310274, 'k': 9, 'm': 8, 'x': 0.66009498411213041}, {}, "5")
     print evaluator({},{}, "-1")
     print evaluator({},{}, "-(7+5)")
-    print evaluator({},{}, "QWSEKO")
+    print evaluator({},{}, "5+7 QWSEKO")

courseware/capa_problem.py

@@ -168,9 +168,9 @@ class LoncapaProblem():
         return html
     
     def grade_schem(self, element):
+        print element
         return "correct"
 
-
     def grade_nr(self, question, answer):
         error = abs(evaluator({},{},answer) - question['answer'])
         allowed_error = abs(question['answer']*question['tolerance'])

settings.py

 ASKBOT_ENABLED = True
 
 DEFAULT_FROM_EMAIL = 'pmitros@csail.mit.edu'
+DEFAULT_FEEDBACK_EMAIL = 'pmitros@csail.mit.edu'
 
 WIKI_REQUIRE_LOGIN_EDIT = True
 WIKI_REQUIRE_LOGIN_VIEW = True

urls.py

@@ -40,6 +40,8 @@ urlpatterns = ('',
 #    url(r'^show_circuit/(?P<circuit>[^/]*)$', 'circuit.views.show_circuit'),
     url(r'^edit_circuit/(?P<circuit>[^/]*)$', 'circuit.views.edit_circuit'),
     url(r'^save_circuit/(?P<circuit>[^/]*)$', 'circuit.views.save_circuit'),
+    url(r'^calculate$', 'util.views.calculate'),
+    url(r'^send_feedback$', 'util.views.send_feedback'),
 )
 
 if settings.ASKBOT_ENABLED:

util/models.py

+from django.db import models
+
+# Create your models here.

util/tests.py

+"""
+This file demonstrates writing tests using the unittest module. These will pass
+when you run "manage.py test".
+
+Replace this with more appropriate tests for your application.
+"""
+
+from django.test import TestCase
+
+
+class SimpleTest(TestCase):
+    def test_basic_addition(self):
+        """
+        Tests that 1 + 1 always equals 2.
+        """
+        self.assertEqual(1 + 1, 2)

util/views.py

+from djangomako.shortcuts import render_to_response, render_to_string
+from django.shortcuts import redirect
+from django.contrib.auth.models import User
+from django.http import HttpResponse
+import json
+from django.conf import settings
+from django.core.context_processors import csrf
+from django.http import Http404
+import courseware.calc
+from django.core.mail import send_mail
+from django.conf import settings
+import datetime
+
+def calculate(request):
+    if not request.user.is_authenticated():
+        raise Http404
+    equation = request.GET['equation']
+    try: 
+        result = courseware.calc.evaluator({}, {}, equation)
+    except:
+        return HttpResponse(json.dumps({'result':'Invalid syntax'}))
+    return HttpResponse(json.dumps({'result':result}))
+
+def send_feedback(request):
+    if not request.user.is_authenticated():
+        raise Http404
+    
+    feedback = render_to_string("feedback_email.txt", 
+                                {"subject":request.GET['subject'], 
+                                 "url": request.GET['url'], 
+                                 "time": datetime.datetime.now().isoformat(),
+                                 "feedback": request.GET['message'], 
+                                 "user":request.user.username})
+
+    send_mail("MITx Feedback / " +request.GET['subject'], 
+              feedback, 
+              settings.DEFAULT_FROM_EMAIL,
+              [ settings.DEFAULT_FEEDBACK_EMAIL ],
+              fail_silently = False
+              )
+    return HttpResponse(json.dumps({'success':True}))