from student import *

def readStudents(fname):
  """ fname is the file name,
  tries to read the information from the file and generate a list of students records,
  returns the list of student records if successful, retuns False otherwise """

  try:
    source = open(fname)

  except: # in case if file cannot be opened, terminate the function, return False
    return False

  studentsRecords = {} # empty dictionary
  student = source.readline() # read the first line from the file
  pos = student.find("  ")

  #print(student[:pos],",",student[pos+1:])

  # create a student record and add it to the dictionary of students' records
  # key is the student's id
  studentsRecords[int(student[:pos])]=makeStudent(student[pos+1:])

  for line in source: # read the rest of the lines from the file
    #print("read:",line)
    pos = line.find("  ")
    studentsRecords[int(line[:pos])]=makeStudent(line[pos+1:])
    
  source.close()

  print("{0} student records are read".format(len(studentsRecords)))

  return studentsRecords

def main():

  # get the file name
  fname = input("Enter the name of input file:")

  records =  readStudents(fname)

  if records != False:
    print("Student's list:")
    for key in records:
      print("{0}: {1}".format(key,records[key].getName()))

  else:
    print("something happened. The records were not read")
  

main()