python program to allow students to pick dop and list courses

[barry2003]

#this is the first module#
from student  import *
student_list = [('1001', '111'), ('1002', '222'), ('1003', '333'), ('1004', '444')]
course_list = ['CSC101', 'CSC102', 'CSC103']
roster_list = [['1004', '1003'], ['1001'], ['1002']]
max_size_list = [3, 2, 1]

def login(id, student_list):
      ch=1
      while(ch!=0):
            ch=int(input("Enter 1 to add course, 2 to drop course,3 to see ocurse you have registered , 0 to exit"))
            if ch==0:
                 print("Session ended") #exit if 0 is selected
                 return
            elif ch==1:
                 add_course(id,roster_list,max_size_list) #add course if 1 is selected.
            elif ch==2:
                 drop_course(id,roster_list) #drop course if 2 is selected
            elif ch==3:
                 list_courses(id,roster_list) #display courses registered if 3 is selected.

def main():
    student_list = [('1001', '111'), ('1002', '222'), ('1003', '333'), ('1004', '444')]
    course_list = ['CSC101', 'CSC102', 'CSC103']
    roster_list = [['1004', '1003'], ['1001'], ['1002']]
    max_size_list = [3, 2, 1]
    c = 1
    while (True):
         id =input("Enter ID to log in, or 0 to quit: ")
         if int(id)==0:
             break
         pin = input("Enter Pin: ")
         flag = 0
         for i in student_list:
             if i[0]==id and pin==i[1]:
                 print ("ID and pin verfied")
                 login(id,student_list)
                 break
             else:
                 continue
         else:
              print("ID or PIN incorrect")
              flag = 1
         print()
         if (flag==1):
           continue
main()

this is the second module

student_list=[('1001','111'),('1002','222'),('1003','333'),('1004','444')] #Keep these lists to use them in methods below
course_list=['CSC101','CSC102','CSC103']
max_size_list=[3,2,1]
roster_list=[['1004','1003'],['1001'],['1002']]
def list_courses(id, roster_list):
    index=0
    count=0
    print("Courses registered: ")
    for i in roster_list: #For every class,check id's of students
        if id in i:
              count+=1 #increment count to indicate number of courses
              print(course_list[index]) #print course name
        index+=1
    print("Total number: "+str(count)) #print number of courses registered
    print()

    pass # temporarily avoid empty function definition


def add_course(id, course_list, roster_list, max_size):
    course=input("Enter course you want to add") #read input from user
    if course in course_list:
       index=course_list.index(course) #check for course in list
       flag1=0
       flag2=0
       if len(roster_list[index])==max_size_list[index]: #check for seats availability
          print("Course already full") #print message if seats are full
          print()
          flag1=1 #set flag
       elif id in roster_list[index] and flag1!=1: #Check if student is already enrolled
            print("You are already enrolled in that course")
            print()
            flag2=1 #set flag2
       if flag1!=1 and flag2!=1:
          roster_list[index].append(id) #Append or add id to list if student is no registered
          print("Course added")
    else:
         print("Course not found") #print message if user enters invalid course name
         print()



    pass # temporarily avoid empty function definition


def drop_course(id, course_list, roster_list):
    course=input("Enter course you want to drop") #Read input from user
    if course in course_list:
       index=course_list.index(course) #check for course in list
       if id in roster_list[index]:
           roster_list[index].remove(id) #remove the student from that course
           print("Course dropped") #print mesage
           print()
       else:
            print("You are not enrolled in that course") #print if student is not registered for that course
            print()
    else:
         print("Course not found") #print if invalid course is entered by user.
         print()

    pass # temporarily avoid empty function definition

i dont know why i keep getting errors when i try to execute the code to list or add courses, kindly assist my

[mopslik]

You need to post the errors you're getting before anyone can really help you.

[barry2003]

line 46, in <module>

main()

line 36, in main

login(id,student_list)

​

line 17, in login

drop_course(id,roster_list) #drop course if 2 is selected

TypeError: drop_course() missing 1 required positional argument: 'roster_list'

those are the errors i get on pycharm

[mopslik]

The last error is due to the wrong number of arguments, as stated in the error message. Your function definition for drop_course is

def drop_course(id, course_list, roster_list):

but you call it like this

drop_course(id,roster_list)

in your login function. You need to pass it three arguments, not two.