#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Fri May 12 14:36:10 2017

@author: griffinhigley
"""

 # instances stored in courses dict user srt ID to query
class course():
    # dict that stores all of the courses key is srt ID
    courses = {}

    def __init__(self,ID , name = 'NONE',  year = '0000' ,semester = 'NA' ,gradeScale = 'Normal', instr = 00, roster = dict()):
        self.ID = ID
        self.name = name
        self.year = year
        self.semester = semester
        self.gradeScale = gradeScale
        self.instructor = instr
        self.roster = dict()
        # function that stores all of the course instances into the courses dict key is srt ID

        course.courses[self.ID] = [self.name,self.year,self.semester, self.gradeScale, self.instructor, self.roster]
        if self.ID in course.courses:
            course1 = course.courses[self.ID]
            course.courses[self.ID] = course1


# user has a dictionary that keeps track of all the instances of the class
# student, instructor, and administrator all take inheritence from user
class user():
    # this stores all the instances of the user class
    users = {}

    def __init__(self, ID, firstName, lastName, userType, password, ):
        # user the id to search for user instances in the user dictionary
        self.ID = ID
        self.fisrtName = firstName
        self.lastName = lastName
        self.userType= userType
        self.password = password

        # this puts the instances of the user class into the users dict.
        user.users[self.ID]=[self.fisrtName,self.lastName,self.userType,self.password]

    # this searches a year and semester and lets you know what courses are offered then
    def search_course(self):
        count = 0
        #courseID = str(input('Please enter the course ID followed by the return key.\n'))
        course_year = str(input('Please enter the year you want to seach followed by the return key.\n'))
        course_semester = str(input('Please enter the semester you would like to search in followed by the return key.\n'))
        course_found = False
        # searches all of the courses
        for k in course.courses:
            cours = course.courses[k]
            #cours[1] is the year of the course
            if cours[1] == course_year:
                if cours[2] == course_semester:
                    count = count + 1
                    print('There is an offering of ', k, course.courses[k])
                    course_found = True

        print('we found ', count, 'courses')

        if course_found == False:
            print('No offering found')
    #prints a list of all the course
    def print_courses(self):
        print(course.courses)



#has a dictionary for all student instances also is put in to the user dict
class student(user):
    # stores all the student instances use the ID to query
    students = {}


    def __init__(self, ID, firstName, lastName, userType, password, schedual= dict(), grades = dict() ):
        self.ID = ID
        self.fisrtName = firstName
        self.lastName = lastName
        self.userType= userType
        self.password = password
        self.schedual = schedual
        self.grades = dict()

        #puts the students information into the student directory
        student.students[self.ID]=[self.fisrtName,self.lastName,self.userType,self.password, self.schedual]

        user.__init__(self, ID, firstName, lastName, userType, password)
        self.ID = ID
        self.fisrtName = firstName
        self.lastName = lastName
        self.userType= userType
        self.password = password

    # Student course registration function
    def add_class(self):
        courseID = str(input('Please enter the course ID followed by the return key.\n'))
        courseYear = str(input('Enter the year that you would like to take this course\n'))
        courseSemester = str(input('Enter the semester you would like to take this course\n'))
        grade = 'NA'
        if courseID in course.courses:
            courseData = course.courses[courseID]
            if courseData[1] == courseYear and courseData[2] == courseSemester:
                self.schedual[courseID] = [course.courses[courseID], [courseID,grade]]
                print('Course',courseID,'was added to your schedual for that year and semester')

            else:
                print('Sorry',courseID,'is not being offerend for that year and semester\n')
        else:
            print('Sorry',courseID,'was not found in the courses that we offer. Make sure that you typed the ID in correct\n')

    def print_grades(self):
        ID = self.ID
        #this is used to grab the grade data from the student class
        stud = student.students[ID]
        classGrades = stud[4]
        print(classGrades)

    def print_class_grade(self):
        Cl = str(input('Please enter the course ID that you would like to see your grade for.\n'))
        clyear = str(input('enter the year you took this course.\n'))
        clsemester = str(input('enter the semester you took this course.\n'))
        studSchedual = self.schedual
        if Cl in studSchedual:
            cour = self.schedual[Cl]
            Cldata = cour[0]
            Clyear = Cldata[1]
            Clsemester = Cldata[2]
            if Clyear == str(clyear) and Clsemester == str(clsemester):
                print(cour)

            else:
                print('looks like you have taken that course just not in the year and semester you entered.\n')

        else:
            print('Looks like you have not taken that course.\n')

    def print_schedual(self):
        courseYear = str(input('Enter the year that you would like to take this course\n'))
        courseSemester = str(input('Enter the semester you would like to take this course\n'))
        courseFound = False
        for Cl in self.schedual:
            if str(self.schedual[Cl][1]) == courseYear and str(self.schedual[Cl][1]) == courseSemester:
                courseFound = True
                print('You have course',Cl,courseYear,'and',courseSemester)
        if courseFound == False:
            print('You do not seem to have any courses for that year and semester')






# all of the students
Connie = student('10001','Connie','Willis','student','Cw1001' )
Kristine = student('10002','Kristine','Rusch','student','Kr1002')
Gregory = student('10003','Gregory','Benford','student','Gb1003')
Carlos = student('10004','Carlos','Hernadez','student','Ch1004')
Nnedi = student('10005','Nnedi','Okarafor','student','No1005')
Cartherynne = student('10006','Cartherynne','Valente','student','Cv1006')


# has a dictionary that stores all the instances also instances are but in the user dict
class instructor(user):
    # stores all of the instances of the instructors user ID to query
     instructors = {}

     def __init__(self, ID, firstName, lastName, userType, password, schedual = dict()):

        self.ID = ID
        self.fisrtName = firstName
        self.lastName = lastName
        self.userType= userType
        self.password = password
        self.schedual = schedual

        # funtion stores all of the instances in the instructors dict
        instructor.instructors[self.ID]=[self.fisrtName,self.lastName,self.userType,self.password, self.schedual]

        user.__init__(self, ID, firstName, lastName, userType, password)
        self.ID = ID
        self.fisrtName = firstName
        self.lastName = lastName
        self.userType= userType
        self.password = password

    #course.courses[self.ID] = [self.name,self.year,self.semester, self.gradeScale, self.instructor, self.roster]

     def printCourseLoad(self):
        clyear = str(input('Please enter the year you want to get you schedule for.\n'))
        clsemester = str(input('Enter the semester you want to chech your schedule for\n'))
        for cl in self.schedual:
            print('1213123')

            if str(self.schedual[cl][2]) == clyear and str(self.schedual[cl][3]) == clsemester:
                print(self.schedual[cl])
                print('ssdfsdfsdf')









     def print_all_course_grades(self):
        courseFound = False
        gradeFound = False
        for cours in course.courses:
            cour = course.courses[cours]
            #print(cour[4])
            #print(self.ID)'
            if str(cour[4]) == self.ID:
                courseFound = True
                for stud in student.students:
                    stu = student.students[stud]

                    if cours in stu[4]:
                        gradeFound = True
                        #print('1124124')
                        print('------------')
                        grad = stu[4]
                        print(cours,':',cour[0],':',stu[0],':',grad[cours])
        if courseFound == False:
            print('Looks like you do not have any courses assigned to you\n')
        if gradeFound ==False:
            print('Looks like there are no students in any of your courses\n')


     def print_course_grades(self):
        studentFound = False
        ClID = str(input('Enter the Course ID that you want to print.\n' ))
        ClYear = str(input('Enter the year you want to print.\n'))
        ClSemeter = str(input('Enter the semester you want to print.\n'))
        if ClID in self.schedual:
            cour = self.schedual[ClID]
            print(cour[1])
            print(cour[2])
            Cldata = cour
            Clyear = Cldata[1]
            Clsemester = Cldata[2]
            if ClYear == Clyear and ClSemeter == Clsemester:
                for stud in student.students:
                    stu = student.students[stud]
                    if ClID in stu[4]:
                        studentFound = True
                        print('------------')
                        grad = stu[4]
                        print(ClID,':',Clyear,':',Clsemester,':',Cldata[0],':',stu[0],':',grad[ClID])
            else:
                print('Looks like you infact do teach this class just not for this semester.\n')
        else:
            print('Sory you can only print the grades of courses that you are the assigned intructor of.\n')

        if studentFound == False:
            print('Looks like there are no students taking this course.\n')

     def class_grade_assign(self):
         studFound = False
         print('This will change the grade of every student in the course.\n')
         option = str(input('Are you sure that you want to do this. please enter yes or no.\n'))
         if option.upper() == 'YES':
             Cl = str(input('Please enter the ID of the course that you would like to do a batch assign of grades to.\n'))
             if Cl in self.schedual:
                 for ID in student.students:
                    stud = student.students[ID]
                    classGrades = stud[4]
                    if Cl in classGrades:
                        studFound = True
                        print('student and course found.\n',ID)
                        grade = str(input('Please enter the grade you would like this course to have.\n'))
                        classGrades[Cl] = grade
                        print('Grade change was successful')


             else:
                print('sory but you can only assign grades to students in classes that you teach\n')
         else:
            pass
         if studFound  == False:
            print('We did not find any students in that course\n')

     def student_assign_grade(self):
         Cl = str(input('Please enter the ID of the course that you would like to do a batch assign of grades to.\n'))
         ID = str(input('Please enter the ID of the student you wish to assign or change the grade of.\n'))
         if Cl in self.schedual:
             if ID in student.students:
                stud = student.students[ID]
                classGrades = stud[4]

                if Cl in classGrades:
                    print('student and course found.\n')
                    grade = str(input('Please enter the grade you would like this course to have.\n'))
                    classGrades[Cl] = grade
                    print('Grade change was successful')
                    print(classGrades)
                else:
                    print('We found a student with that ID but they do not seem to have that course in their schedule\n')
             else:
                print('There does not seem to be any student with that ID\n')
         else:
            print('Sorry but you can only assign/change the grade of students grades in courses that you are the teacher of.\n')




     #This is for testing
     """def print_schedual(self):
        ClYear = str(input('Enter the year you want to print.\n'))
        ClSemeter = str(input('Enter the semester you want to print.\n'))
        for ClID in self.schedual:
            cour = self.schedual[ClID]
            Cldata = cour
            Clyear = Cldata[1]
            Clsemester = Cldata[2]
            if ClYear == Clyear and ClSemeter == Clsemester:
                print(ClID,':',self.schedual[ClID],':',ClYear,':',Clsemester)

            else:
                print('Looks like you do not have any classes for that year and semester')"""

     def see_if_student_in(self):
         ClID = str(input('Enter the Course ID that you want to print (capitalize and integer).\n' ))

         ClYear = str(input('Enter the year you want to print(enter as integer).\n'))
         # do not capitalize
         ClSemeter = str(input('Enter the semester you want to print (Do not capitalize).\n'))
         studentID = str(input('Enter the ID of the student you wish to see if they are in your class(Enter as )'))
         studentFound = False
         if ClID in self.schedual:
             if studentID in student.students:
                 if ClID in student.students[studentID][4]:
                     sched = student.students[studentID][4]
                     for Cl in sched:
                         Clyear = sched[Cl][1]
                         Clsemester = sched[Cl][2]
                         if ClYear == str(Clyear) and ClSemeter == str(Clsemester):
                             print(studentID,':',student.students[studentID][0],':',student.students[studentID][1],':','Is in your class',ClID,':','for the year',':',ClYear,':','and semester',':',ClSemeter)
                             studentFound = True
                 else:
                     print('Looks like that student does not have that class for that year and semester\n')
             else:
                 print('No student was found with that ID make sure you typed it in correctly\n')
         else:
             print('Sorry but you can only search courses that you are the instructor for\n')
         if studentFound == False:
             print('Student is not in that perticular course offering')

        # print out the students in a course offering
     def print_roster(self):
         studentFound = False
         ClID = str(input('Enter the Course ID that you want to print (capitalize and integer).\n' ))
         ClYear = str(input('Enter the year you want to print(enter as integer).\n'))
         # do not capitalize
         ClSemeter = str(input('Enter the semester you want to print (Do not capitalize).\n'))
         if ClID in self.schedual:
             for studentID in student.students:
                 if ClID in student.students[studentID][4]:
                     sched = student.students[studentID][4]
                     Clyear = sched[ClID][1]
                     Clsemester = sched[ClID][2]
                     if ClYear == str(Clyear) and ClSemeter == str(Clsemester):
                         print(studentID,':',student.students[studentID][0],':',student.students[studentID][1],':','Is in your class',ClID,':','for the year',':',ClYear,':','and semester',':',ClSemeter)
                         studentFound = True
         else:
             print('Sorry you can only print our a roster for classes you are teaching. If you are supost to be teaching this course please contact your admin\n')
         if studentFound == False:
            print('Looks like there are not student taking that course\n')


     def print_schedule(self):
        courseYear = str(input('Enter the year that you would like to take this course\n'))
        courseSemester = str(input('Enter the semester you would like to take this course\n'))
        courseFound = False
        for Cl in self.schedual:
            Clyear = self.schedual[Cl][1]
            Clsemester = self.schedual[Cl][2]
            if courseYear == str(Clyear) and courseSemester == str(Clsemester):
                courseFound = True
                print('You have course',Cl,courseYear,'for',courseSemester)
        if courseFound == False:
            print('You do not seem to have any courses for that year and semester')

# all of the instrucotrs
Nancy = instructor('1003','Nancy','Kress','instructor','Nk1003')
Vandana = instructor('1004','Vandana','Simgh','instructor','Vs1004')
Usman = instructor('1005','Usman','Malik','instructor','Um1005')


# instances are stored in administrators dict as well as user dict use str ID to query
class administrator(user):
    # stores all the instances of administrators
     administrators = {}

     def __init__(self, ID, firstName, lastName, userType, password):
        self.ID = ID
        self.fisrtName = firstName
        self.lastName = lastName
        self.userType= userType
        self.password = password
        # function that puts instances of administrator in administrators ditc user str ID to queryS
        administrator.administrators[self.ID]=[self.fisrtName,self.lastName,self.userType,self.password]

        user.__init__(self, ID, firstName, lastName, userType, password)
        self.ID = ID
        self.fisrtName = firstName
        self.lastName = lastName
        self.userType= userType
        self.password = password

     def creat_course (self):
        ID = str(input('Please enter the course ID followed by the return key.\n'))
        name = str(input('Please enter the course name followed by the return key.\n'))
        year = str(input('Please enter the course year followed by the return key.\n'))
        semester = str(input('Please enter the course semester followed by the return key.\n'))
        gradeScale = str(input('Please enter the course gradeScale followed by the return key.\n'))
        instructor = str(input('Please enter the course instructor followed by the return key.\n'))
        course.courses[ID] = [name, year, semester, gradeScale, instructor]
        print(course.courses[ID])
     def mod_course(self):
        ID = str(input('Please enter the course ID followed by the return key.\n'))
        name = str(input('Please enter the course name followed by the return key.\n'))
        year = str(input('Please enter the course year followed by the return key.\n'))
        semester = str(input('Please enter the course semester followed by the return key.\n'))
        gradeScale = str(input('Please enter the course gradeScale followed by the return key.\n'))
        instructor = str(input('Please enter the course instructor followed by the return key.\n'))
        if ID in course.courses:
            modCourse = course.courses[ID]
            print('Course Found!!!!\n')
            if len(name) != 0:
                modCourse[0] = name
                print('Course name change was successful.\n')
            if len(year) != 0:
                modCourse[1] = year
                print('Course Year change was successful.\n')
            if len(semester) != 0:
                modCourse[2] = semester
                print('Course semester change was successful.\n')
            if len(gradeScale) != 0:
                modCourse[3] = gradeScale
                print('Course gradeScale change was successful.\n')
            if len(instructor) != 0:
                modCourse[4] = instructor
                print('Course instructor change was successful.\n')

            print('Course Mods where successful.\n')
            print(ID,course.courses[ID])

        else:
            print('looks like that course in not in the catalog yet\n if you would like to add it please call the add course function')


     def change_grade(self):
        ID = str(input('Please enter the ID of the student you wish to change the grade of.\n'))
        Cl = str(input('Please enter the course ID for the course you wish to change the grade.\n'))

        if ID in student.students:
            stud = student.students[ID]
            classGrades = stud[4]

            if Cl in classGrades:
                print('student and course found.\n')
                grade = str(input('Please enter the grade you would like this course to have.\n'))
                classGrades[Cl] = grade
                print('Grade change was successful')
                print(classGrades)

     def print_cl_grades(self):
        print('Some students may not have grades yet if that is the case then you will get back all the information about that student and course\n')
        courseID = str(input('Enter the ID of the course you would like to print all the grades of.\n'))
        ClYear = str(input('Enter the year you want to print(enter as integer).\n'))
         # do not capitalize
        ClSemester = str(input('Enter the semester you want to print (Do not capitalize).\n'))
        for ID in student.students:
            stud = student.students[ID]
            schedual = stud[4]
            if courseID in schedual:
                Cldata = schedual[courseID]
                Clyear = Cldata[1]
                Clsemester = Cldata[2]
                if ClYear == str(Clyear) and ClSemester == str(Clsemester):
                    grade = schedual[courseID]
                    name = stud[0:3]
                    print(ID,name, grade)
                    #self.schedual[courseID] = [course.courses[courseID], [courseID,grade]]


     def print_stud_grades(self):
         stuID = str(input('Enter the Id of the student you want to print the grades of.\n'))
         if stuID in student.students:
             stu = student.students[stuID]
             print(stuID,':',stu[0],':',stu[1],':',stu[4])



     def print_inst_grades(self):
        instID = str(input('Enter the ID of the instructor you to print class grades of.\n'))
        if instID in instructor.instructors:
            inst = instructor.instructors[instID]
            instSched = inst[4]
            print(instSched)

     def assign_inst_course(self):
        instID = str(input('Enter the ID the instructor you would like to assign a course to.\n'))

        if instID in instructor.instructors:
            inst = instructor.instructors[instID]
            instSched = inst[4]
            courseID = str(input('enter the ID of the course you would like to add to their schedual.\n'))
            if courseID in course.courses:
                cour = course.courses[courseID]
                cour[5] = str(instID)
                instSched[courseID] = course.courses[courseID]
                print(instSched, cour[5],course.courses[courseID],'made it')



# admins
Leigh = administrator('1001','Leigh','Brackett','administrator','Lb1001')
Isaac = administrator('1002','Isaac','Asimov','administrator','Ia1002')












# all of the courses
CSCI1004 = course('CSCI1004','A Weakly Typical Python', '2016', 'fall', 'Pass Fail', '1004' )
CSCI2004 = course('CSCI2004','The Objective of the Caml', '2016', 'fall', 'Normal','1004' )
POLS2701 = course('POLS2701','The Meaning of the Constitution')
HUMN2211 = course('HUMN2211','Living the Liberal Arts')
PHIL3333 = course('PHIL3333','The Objective Truth' ,'2017','spring','Normal','1005')
BIOS3791 = course('BIOS3791','Living System' )
ENGR4792 = course('ENGR4792','Systems Living','2017','fall','normal','1005')
PHIL4797 = course('PHIL4797','Living Systemically')



# given data
#teachers
Vandana.schedual['CSCI1004'] = course.courses['CSCI1004']
Usman.schedual['PHIL3333'] = course.courses['PHIL3333']
Usman.schedual['ENGR4792'] = course.courses['ENGR4792']
#students
Connie.schedual['CSCI1004'] = course.courses['CSCI1004']
Kristine.schedual['CSCI1004'] = course.courses['CSCI1004']
Gregory.schedual['CSCI1004'] = course.courses['CSCI1004']
Carlos.schedual['CSCI1004'] = course.courses['CSCI1004']
Nnedi.schedual['CSCI1004'] = course.courses['CSCI1004']
Cartherynne.schedual['CSCI1004'] = course.courses['CSCI1004']


Connie.schedual['PHIL3333'] = course.courses['PHIL3333']
Kristine.schedual['PHIL3333'] = course.courses['PHIL3333']
Gregory.schedual['PHIL3333'] = course.courses['PHIL3333']
Carlos.schedual['PHIL3333'] = course.courses['PHIL3333']
Nnedi.schedual['PHIL3333'] = course.courses['PHIL3333']
Cartherynne.schedual['PHIL3333'] = course.courses['PHIL3333']

Connie.schedual['ENGR4792'] = course.courses['ENGR4792']
Kristine.schedual['ENGR4792'] = course.courses['ENGR4792']
Gregory.schedual['ENGR4792'] = course.courses['ENGR4792']
Carlos.schedual['ENGR4792'] = course.courses['ENGR4792']
Nnedi.schedual['ENGR4792'] = course.courses['ENGR4792']
Cartherynne.schedual['ENGR4792'] = course.courses['ENGR4792']






def login():
    global userID
    userID = str(input("Please enter your ID followed by the return key.\n"))
    password = str(input('Please enter your password followed by the return key.\n'))
    if userID in user.users:
        print('Checking')
        usercall = user.users[userID]
        userType = usercall[2]
        print(userType)
        if password == usercall[3]:
            print('Logedin as:',userType,usercall[0],usercall[1],userID)
            if userID in administrator.administrators :
                usercall = administrator.administrators[userID]
                User = administrator(userID,usercall[0],usercall[1],userType,usercall[3])
                main(User,userType)
                return userType
            elif userID in instructor.instructors:
                usercall = instructor.instructors[userID]
                schedule = usercall[4]
                print(schedule)
                User = instructor(userID,usercall[0],usercall[1],userType,usercall[3],schedule)
                print(schedule)
                main(User,userType)
                return userType
            elif userID in student.students:
                userType ='student'
                usercall = student.students[userID]
                schedule = usercall[4]
                User = student(userID,usercall[0],usercall[1],userType,usercall[3],schedule)
                main(User,userType)
                return userType


    else:
        print('Sorry ID or Password did not match please check you typed it in right and try again.\n')
        choice = str(input('Would you like to try again\n\
[0]Yes\n\
[1]No\n'))
        if choice == '0':
            login()
        elif choice =='1':
            pass
        else:
            print('Well that was not one of the optoins but we think that you ment No')

def main(User,userType):
     while True:
        if userType == 'student':
            choose = input('What do you wish to do? \n\
[0] See what courses are going to be offered for a year and semester\n\
[1] Print list of all courses\n\
[2] Register for a course \n\
[3] Print all of your grades\n\
[4] Print a specific courses grades \n\
[L] Logout / End session\n\
[Q] Quit\n\n>>').upper()
            if choose == '0':
                User.search_course()
            elif choose == '1':
                User.print_courses()
            elif choose == '2':
                User.add_class()
            elif choose == '3':
                User.print_grades()
            elif choose == '4':
                User.print_class_grade()
            elif choose == 'Q':
                break
            elif choose =='L':
                login()
                break

        if userType == 'instructor':
            choose = input('What do you wish to do? \n\
[0] Print grades of all students in all courses in your schedule\n\
[1] Print the grades the students in all your courses have\n\
[2] Assing a studnet a grade\n\
[3] See if a student is in one of your courses\n\
[4] Print Roster \n\
[5] Print schedule \n\
[L] Logout / End session\n\
[Q] Quit\n\n>>').upper()
            if choose == '0':
                User.print_all_course_grades()
            elif choose == '1':
                User.print_course_grades()
            elif choose == '2':
                User.class_grade_assign()
            elif choose == '3':
                User.see_if_student_in()
            elif choose == '4':
                User.print_roster()
            elif choose == '5':
                User.print_schedule()
            elif choose == 'Q':
                break
            elif choose =='L':
                login()
                break

        if userType == 'administrator':
            choose = input('What do you wish to do? \n\
[0] Assign an instructor a course\n\
[1] Print out the grades that students have in all of a instructors courses\n\
[2] Print out a particular students grades \n\
[3] Print out all of grades for a particular course\n\
[4] Change a students grade in a course \n\
[5] Create a course \n\
[6] Change a course \n\
[7] Search for a course \n\
[8] Batch assign al studnets in a particular course a grade \n\
[L] Logout / End session\n\
[Q] Quit\n\n>>').upper()
            if choose == '0':
                User.assign_inst_course()
            elif choose == '1':
                User.print_inst_grades()
            elif choose == '2':
                User.print_stud_grades()
            elif choose == '3':
                User.print_cl_grades()
            elif choose == '4':
                User.change_grade()
            elif choose == '5':
                User.creat_course()
            elif choose == '6':
                User.mod_course()
            elif choose == '7':
                User.search_course()
            elif choose =='8':
                User.class_grade_assign()
            elif choose == 'Q':
                break
            elif choose =='L':
                login()
                break
login()

#Usman.student_assign_grade()
#Usman.print_all_course_grades()

#Connie.print_grades()
#print(Connie.schedual)


'''
Leigh.assign_inst_course()
Leigh.print_inst_grades()
Leigh.print_stud_grades()
Leigh.print_cl_grades()
Leigh.change_grade()
Leigh.creat_course()
Leigh.mod_course()
'''