def _load_departments(self, json_data):
decoder = JSONDecoder()
courses = decoder.decode_courses(json_data)
for course in courses:
dep_code = course.department.code
if not self.departments.has_key(dep_code):
self.departments[dep_code] = course.department
department = self.departments[dep_code]
department.add_course(course)
def list_courses(self, department_code = None):
decoder = JSONDecoder()
courses = decoder.decode_courses(self.json_data)
if department_code:
courses = [course for course in courses if course.department.code == department_code]
return courses
