Student management system is implemented based on python

This paper shares the specific code of python student management system for your reference. The specific content is as follows

Version 1.0 student Management System

'''
 1. Add the student 
 2. Modify the students 
 3. Query students 
 4. Delete the students 
 0. Exit the program 
'''
student_list=[]
while True:
 print('1. Add the student ')
 print('2. Modify the students ')
 print('3. Query students ')
 print('4. Delete the students ')
 print('0. Exit the program ')
 sel_num=input(' Please enter what you want to do: ')
 sel_num=int(sel_num)
 # If the selected number is not 0~5  Continue to choose 
 while sel_num not in range(0,5):
  sel_num=input(' Your selection is invalid, please re-select: ')
  sel_num=int(sel_num)
 if sel_num==1:
  name=input(' Please enter your name: ')
  age=input(' Please enter your age: ')
  sex=input(' Please enter gender: ')
  person_list=[name,age,sex]
  student_list.append(person_list)
  print(' Added successfully! ')
 elif sel_num==2:
  for x in range(0,len(student_list)):
   person=student_list[x]
   print(' Serial number: %s  Name: %s  age :%s  gender :%s '%(x,person[0],person[1],person[2]))
  index=input(' Please enter the serial number you want to modify: ')
  index=int(index)
  while index not in range(0, len(student_list)):
   index = input(' The serial number you selected is invalid. Please re-select: ')
   index = int(index)
  person=student_list[index]
  name=person[0]
  age=person[1]
  sex=person[2]
  student_list[index][0]=input(' Please enter the modified name: (%s):'%name)
  student_list[index][1]=input(' Please enter the modified age: (%s):'%age)
  student_list[index][2]=input(' Please enter the modified gender: (%s)'%sex)
  print(' Modified successfully! ')
 elif sel_num==3:
  for x in range(0,len(student_list)):
   person=student_list[x]
   name=person[0]
   age=person[1]
   sex=person[2]
   print(' Serial number: %s  Name: %s  age :%s  gender :%s '%(x,name,age,sex))
 elif sel_num==4:
  for x in range(0,len(student_list)):
   person=student_list[x]
   print(' Serial number: %s  Name: %s  age :%s  gender :%s '%(x,person[0],person[1],person[2]))
  print('1. Delete all trainees ')
  print('2. Delete the selected student ')
  num=input(' Please enter your choice: ')
  if num=='1':
   student_list.clear()
  else:
   index = input(' Please enter the serial number of the student to delete: ')
   index = int(index)
   while index not in range(0, len(student_list)):
    index = input(' The serial number you selected is invalid. Please re-select: ')
    index = int(index)
   del student_list[index]
 else:
  break

Version 2.0 student management system - Function version - uses lists to store student information

# Add student function 
def add_student():
 # Enter the student's name, age and telephone number 
 name=input(' Please enter student name: ')
 age=input(' Please enter student age: ')
 phone=input(' Please enter the student's telephone number: ')
 # the name , age , phone Put it in a little list 
 student=[name,age,phone]
 #  Add the small list to the large list of all trainees 
 # append(object) insert(index,object) extend(iterable)
 student_list.append(student)
 print(' Add trainee success! ')
# Query the student function 
def query_student():
 #1. Query all trainees 
 #2. Enter student name   Query trainees to get the serial number of the query trainees 
 print('1. Query all trainees ')
 print('2. Query some trainees ')
 num=int(input(' Please enter the operation sequence number: '))
 while num not in range(1,3):
  num=int(input(' Invalid selection, please re-enter: '))
 if num==1:
  print('************** Student Information list ***************')
  # Iterate through the large list 
  for x in range(0,len(student_list)):
   # According to the x From the large list to the small list 
   student=student_list[x]
   # Remove your name, age, and phone number from the list 
   name=student[0]
   age=student[1]
   phone=student[2]
   print(' The serial number :%s  The name :%s  age :%s  The phone :%s'%(x,name,age,phone))
 else:
  name = input(' Please enter the name of the student you want to check: ')
  while 1:
   a=False
   for student in student_list:
    if student[0] == name:
     index = student_list.index(student, 0, 8)
     print(' Serial number: %s  Name: %s  age :%s  The phone :%s'%(index,student_list[index][0],student_list[index][1],student_list[
     index][2]))
     a=True
   if a==False:
    name=input(' The student was not found, please re-enter: ')
   else:
    break
 
#  Modify the student's function 
def update_student():
 # Determines if there is any student information, and if not, terminates the function execution 
 if len(student_list)==0:
  print(' No student information, can not modify the operation! ')
  # Force an end to function execution  return None of the following code will execute again 
  return
 #1. Query student information 
 query_student()
 #2. Select the trainee number you want to modify 
 num=input(' Please select the student number you want to modify: ')
 #3. Convert to integer 
 num=int(num)
 #4. Determines whether the selected student serial number is in the range 
 while num not in range(0,len(student_list)):
  # Out of range, reselect 
  num=input(' There is no such serial number, please re-select: ')
  num=int(num)
 #5. Extract the corresponding small list according to the selected sequence number 
 student=student_list[num]
 new_name=input(' Please enter the modified name (%s) : '%student[0])
 new_age=input(' Please enter the modified age (%s)'%student[1])
 new_phone=input(' Please enter the modified phone number (%s)'%student[2])
 #6. Modify the data in the small list 
 student[0]=new_name
 student[1]=new_age
 student[2]=new_phone
 print(' Modify data complete! ')
# Delete the students 
#1. Delete according to student serial number  2. Delete all trainees  3. Delete according to the student's name ( There are of the same name )
def delete_student():
 if len(student_list)==0:
  print(' No student information, can not perform delete operation! ')
  return
 print('1. Delete according to student serial number ')
 print('2. Delete all trainees ')
 print('3. Delete students according to their names ')
 # Gets the input and converts it to an integer type 
 num=int(input(' Please enter your choice: '))
 # Determine if the selected option is within range 
 while num not in range(1,4):
  num=int(input(' There is no serial number, please select it again '))
 # Determine the selected option 
 if num == 1:
  # 1. Query student information 
  query_student()
  #2. Select the number to delete 
  num=int(input(' Please enter the student number you want to delete: '))
  # Determine if the selection number is in range 
  while num not in range(0,len(student_list)):
   num=int(input(' The serial number is invalid, please reselect it! '))
  is_del=input(' You are sure you want to delete (%s) Student information? (y/n):'%student_list[num][0])
  if is_del=='y':
   # Delete all data in the list 
   del student_list[num]
   #student_list.pop(index)
   print('%s Student information deleted successfully! '%student_list[num][0])
 if num==2:
  # Confirm the deletion 
  is_del=input(' Are you sure you want to delete all student information? y( determine )/n( cancel ):')
  if is_del=='y':
   # Delete all data in the list 
   student_list.clear()
   print(' All students deleted successfully! ')
  else:
   print(' Delete data operation cancelled! ')
 else:
  name = input(' Please enter the name of the student you want to delete: ')
  while 1:
   # Definition list storage is not equal to name The list of small 
   list = []
   # Iterate through the large list 
   for student in student_list:
    # Judging input name Whether and small list name The equality of 
    if student[0] != name:
     # To find out and name The index in which the unequal small lists reside 
     index = student_list.index(student,0,len(student_list))
     # Adds a small list of matches to list In the list 
     list.append(student_list[index])
   # Determine if two lists are the same length   Equality means there is no name in the large list name The list of small 
   if len(student_list) == len(list):
    name = input(' The serial number does not exist, please re-enter: ')
   # There is a small list of matches 
   else:
    # Clear the list 
    student_list.clear()
    # Loop will list The contents of the list are written to an empty large list 
    for dict in list:
     student_list.append(dict)
    break
#1. The statement 1 A large list of all student information 
student_list=[]
#2.while cycle 
while True:
 print('*********** Student management system V2.0**************')
 print('1. Add the student ')
 print('2. Query students ')
 print('3. Modify the students ')
 print('4. Delete the students ')
 print('0. Exit the program ')
 print('***************************************')
 # Select operation 
 num=input(' Please select your operation: ')
 # Convert to integer 
 num=int(num)
 # Determine if the selected option is within range 
 while num not in range(0,5):
  # To choose 
  num=input(' This option is not available, please reselect: ')
  # Converts a string to an integer type 
  num=int(num)
 # Perform the corresponding action based on the selected option 
 if num==1:
  # Calls the function that adds the student 
  add_student()
 elif num==2:
  # Call the function that queries the student 
  query_student()
 elif num==3:
  # Calls the function that modifies the student's 
  update_student()
 elif num==4:
  delete_student()
 else:
  print(' Program is over !')
  break

2.1 Student Management system -- Function version -- use dictionary to store student information

# Add student function 
def add_student():
 # Enter the student's name, age and telephone number 
 name=input(' Please enter student name: ')
 age=input(' Please enter student age: ')
 phone=input(' Please enter the student's telephone number: ')
 # the name , age , phone Put it in a small dictionary 
 student={'name':name,'age':age,'phone':phone}
 #  Add the small dictionary to the large list of all students 
 # append(object) insert(index,object) extend(iterable)
 student_list.append(student)
 print(' Add trainee success! ')
# Query the student function 
def query_student():
 #1. Query all trainees 
 #2. Enter student name   Query trainees to get the serial number of the query trainees 
 print('1. Query all trainees ')
 print('2. Query some trainees ')
 num=int(input(' Please enter the operation sequence number: '))
 while num not in range(1,3):
  num=int(input(' Invalid selection, please re-enter: '))
 if num==1:
  print('************** Student Information list ***************')
  # Iterate through the large list 
  for x in range(0,len(student_list)):
   # According to the x Take the small dictionary from the large list 
   student=student_list[x]
   # Remove your name, age, and phone number from the small dictionary 
   name=student['name']
   age=student['age']
   phone=student['phone']
   print(' The serial number :%s  The name :%s  age :%s  The phone :%s'%(x,name,age,phone))
 else:
  name = input(' Please enter the name of the student you want to check: ')
  while 1:
   a=False
   for student in student_list:
    if student['name'] == name:
     index = student_list.index(student, 0, 8)
     print(' Serial number: %s  Name: %s  age :%s  The phone :%s'%(index,student_list[index]['name'],student_list[index]['age'],
             student_list[index]['phone']))
     a=True
   if a==False:
    name=input(' The student was not found, please re-enter: ')
   else:
    break
 
#  Modify the student's function 
def update_student():
 # Determines if there is any student information, and if not, terminates the function execution 
 if len(student_list)==0:
  print(' No student information, can not modify the operation! ')
  # Force an end to function execution  return None of the following code will execute again 
  return
 #1. Query student information 
 query_student()
 #2. Select the trainee number you want to modify 
 num=input(' Please select the student number you want to modify: ')
 #3. Convert to integer 
 num=int(num)
 #4. Determines whether the selected student serial number is in the range 
 while num not in range(0,len(student_list)):
  # Out of range, reselect 
  num=input(' There is no such serial number, please re-select: ')
  num=int(num)
 #5. Take out the corresponding small dictionary according to the selected sequence number 
 student=student_list[num]
 new_name=input(' Please enter the modified name (%s) : '%student['name'])
 new_age=input(' Please enter the modified age (%s)'%student['age'])
 new_phone=input(' Please enter the modified phone number (%s)'%student['phone'])
 #6. Modify the data in the small list 
 student['name']=new_name
 student['age']=new_age
 student['phone']=new_phone
 print(' Modify data complete! ')
# Delete the students 
#1. Delete according to student serial number  2. Delete all trainees  3. Delete according to the student's name ( There are of the same name )
def delete_student():
 if len(student_list)==0:
  print(' No student information, can not perform delete operation! ')
  return
 print('1. Delete according to student serial number ')
 print('2. Delete all trainees ')
 print('3. Delete students according to their names ')
 # Gets the input and converts it to an integer type 
 num=int(input(' Please enter your choice: '))
 # Determine if the selected option is within range 
 while num not in range(1,4):
  num=int(input(' There is no serial number, please select it again '))
 # Determine the selected option 
 if num == 1:
  # 1. Query student information 
  query_student()
  #2. Select the number to delete 
  num=int(input(' Please enter the student number you want to delete: '))
  # Determine if the selection number is in range 
  while num not in range(0,len(student_list)):
   num=int(input(' The serial number is invalid, please reselect it! '))
  is_del=input(' You are sure you want to delete (%s) Student information? (y/n):'%student_list[num]['name'])
  if is_del=='y':
   # Delete all data in the list 
   del student_list[num]
   #student_list.pop(index)
   print('%s Student information deleted successfully! '%student_list[num]['name'])
  else:
   print(' Delete data operation cancelled! ')
 elif num==2:
  # Confirm the deletion 
  is_del=input(' Are you sure you want to delete all student information? y( determine )/n( cancel ):')
  if is_del=='y':
   # Delete all data in the list 
   student_list.clear()
   print(' All students deleted successfully! ')
  else:
   print(' Delete data operation cancelled! ')
 else:
  name = input(' Please enter the name of the student you want to delete: ')
  while 1:
   #  Definition list storage is not equal to name The list of small 
   list=[]
   #  Iterate through the large list 
   for student in student_list:
    #  Judging input name Whether and small dictionary name The equality of 
    if student['name']!=name:
     #  To find out and name The index in which different small dictionaries are located 
     index=student_list.index(student)
     #  Adds a matching small dictionary to list In the list 
     list.append(student_list[index])
   #  Determine if two lists are the same length   Equality means there is no name in the large list name The list of small 
   if len(student_list)==len(list):
    name=input(' The serial number does not exist, please re-enter: ')
   #  There are little dictionaries that match 
   else:
    #  Clear the list 
    student_list.clear()
    #  Loop will list The contents of the list are written to an empty large list 
    for dict in list:
     student_list.append(dict)
    break
#1. The statement 1 A large list of all student information 
student_list=[]
#2.while cycle 
while True:
 print('*********** Student management system V2.0**************')
 print('1. Add the student ')
 print('2. Query students ')
 print('3. Modify the students ')
 print('4. Delete the students ')
 print('0. Exit the program ')
 print('***************************************')
 # Select operation 
 num=input(' Please select your operation: ')
 # Convert to integer 
 num=int(num)
 # Determine if the selected option is within range 
 while num not in range(0,5):
  # To choose 
  num=input(' This option is not available, please reselect: ')
  # Converts a string to an integer type 
  num=int(num)
 # Perform the corresponding action based on the selected option 
 if num==1:
  # Calls the function that adds the student 
  add_student()
 elif num==2:
  # Call the function that queries the student 
  query_student()
 elif num==3:
  # Calls the function that modifies the student's 
  update_student()
 elif num==4:
  delete_student()
 else:
  print(' Program is over !')
  break

Version 3.0 Student Management system - saves student information to a file

def is_in_range():
 index = input(' Please choose to ( Modify the ) Student Serial number deleted: ')
 index = int(index)
 while index not in range(0, len(student_list)):
  index = input(' The serial number you entered is not in the range, please re-enter: ')
  index = int(index)
 return index
def add_stu():
 name = input(' Please enter your name: ')
 age = input(' Please enter your age: ')
 sex = input(' Please enter gender: ')
 person_list = [name, age, sex]
 student_list.append(person_list)
 print(' Added successfully! ')
def alter_stu():
 index=is_in_range()
 person = student_list[index]
 name = person[0]
 age = person[1]
 sex = person[2]
 student_list[index][0] = input(' Please enter the modified name: (%s):' % name)
 student_list[index][1] = input(' Please enter the modified age: (%s):' % age)
 student_list[index][2] = input(' Please enter the modified gender: (%s)' % sex)
 print(' Modified successfully! ')
def see_stu():
 for x in range(0, len(student_list)):
  person = student_list[x]
  name = person[0]
  age = person[1]
  sex = person[2]
  print(' Serial number: %s  Name: %s  age :%s  gender :%s ' % (x, name, age, sex))
def del_stu():
 print('1. Delete all trainees ')
 print('2. Delete the selected student ')
 num = input(' Please enter your choice: ')
 if num == '1':
  student_list.clear()
 else:
  index = is_in_range()
  del student_list[index]
# Declare the function that holds the data 
def save_data():
 #1. Open the file 
 file_handle=open('student_v2.txt',mode='w')
 #2.for Loop through the large list 
 for student in student_list:
  # Splice the data in the list with whitespace 1 A string 
  s=' '.join(student)
  # write 
  file_handle.write(s)
  file_handle.write('\n')
 #3. Close the file 
 file_handle.close()
# The introduction of os The module 
import os
# A function that reads a file 
def read_data():
 # Determine if the file exists 
 rs=os.path.exists('student_v2.txt')
 if rs==True:
  #1. Open the file 
  file_handle=open('student_v2.txt',mode='r')
  #2. Take out the information 
  contents=file_handle.readlines()
  for content in contents:
   # Get rid of /n
   content=content.strip('\n')
   # Use whitespace to split the string and get the list 
   list_1=content.split(' ')
   # Adds a small list to a large list 
   student_list.append(list_1)
  # 3. Close the file 
  file_handle.close()
#  The statement 1 A large list of the names of colleges 
student_list = []
read_data()
while True:
 print('1. Add the student ')
 print('2. Modify the students ')
 print('3. Query students ')
 print('4. Delete the students ')
 print('0. Exit the program ')
 sel_num = input(' Please enter what you want to do: ')
 sel_num = int(sel_num)
 #  If the selected number is not 0~5  Continue to choose 
 while sel_num not in range(0, 5):
  sel_num = input(' Your selection is invalid, please re-select: ')
  sel_num = int(sel_num)
 #  Add the student 
 if sel_num == 1:
  add_stu()
  save_data()
 elif sel_num == 2:
  # 1. Display all student information 
  see_stu()
  # 2. Select the trainee number you want to modify 
  alter_stu()
  save_data()
 elif sel_num == 3:
  see_stu()
 elif sel_num == 4:
  see_stu()
  # 2. Select the student number you want to delete 
  del_stu()
  save_data()
 else:
  break