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Student information system

Tip: the student performance management system written by python, including 8 functions and packaged tutorials

Functional interface def menum (): print ('= student_manger=') print ('- functional interface -') print ('\ t\ T1. Enter student information') print ('\ t\ T2. Find student information') print ('\ t\ T3. Delete student information') print ('\ t\ t4. Modify students' grades') print ('\ t\ t5. Sort') print ('\ t\ t6. Count the total number of students') print ('\ t\ t7. Show all student information') print ('\ t\ t8. Display the function introduction button') print ('\ t\ t0. Exit') print ('= =') II. Main function def main (): menum () while True: try: choice = int (input ('Please select what you want to do:') except ValueError: print ('there is an error in the data entered, you can only enter integers from 0 to 7!') Try: choice = int (input ('please re-enter:') except ValueError: print ('repeated input error, exit the system!') Break if choice in [0, 1, 2, 3, 4, 5, 6, 7, 8]: if choice = 0: answer = input ('are you sure you want to exit the system? (y or answer N):') if answer = ='Y' or answer = 'yearly: print (' Thank you for using!') Break elif answer ='N' or answer = = 'nasty: print (' going back to the previous step!') Continue else: input ('input error, about to return to the main interface') Continue elif choice = 1: insert () elif choice = = 2: search () elif choice = = 3: delete () elif choice = = 4: modify () elif choice = = 5: sort () elif choice = = 6 : total () elif choice = = 7: show () else: menum () else: print ('the operation you selected is invalid Please re-enter! (3) the function of entering student information

Logical structure diagram

Def insert (): student_list = [] id_list = [] while True: id = input ('Please enter ID:') if not id: break name = input ('Please enter name:') if not name: break try: english = float (input ('Please enter English grades:') Math = float (input ('please enter math scores:') python = float (input ('please enter Python scores:') except ValueError: print ('data entry error!') Continue # stores the entered student information in the dictionary student = {'id': id,' name': name, 'english': english,' math': math 'Python': python} # store each student's information in the list if student [' id'] in id_list: # student ['id'] = value (id) print (' the same ID:' already exists) for i in range (len (student_list)): if student_ list [I] [id] = = student [id]: # output repeating id element print (student_ list [I]. Items () break print ('Please re-enter!') Else: id_list.append (str (student ['id']) student_list.append (student) # do you want to continue adding student information answer = input (' do you want to continue adding student information? (y or answer N):') if answer = ='Y'or answer = = 'y': continue elif answer = =' N' or answer = = 'nails: # storing student information save (student_list, filename) print (' student information input is complete!') Break else: print ('input error, about to return to the main interface') Break IV. Student information search function

Logical structure diagram

Code

Def search (): while True: if os.path.exists (filename): with open (filename,'r' Encoding = 'utf-8') as s_file: student_qurey = s_file.readlines () # take out all the student information id_list = [] name_list = [] for i in student_qurey: d = dict (eval (I)) Id_list.append (d ['id']) # stores all students' id in id_list (d ['name']) # stores all students' name in id_list try: mode = int ('Please select query mode: 1. Follow the ID query / 2. Query by name') except ValueError: print ('data type input error! Please re-enter!') Else: if mode = = 1: # query id = input by ID ('Please enter student id:') if id in id_list: print ('the student has been found:') Print ('ID\ t\ t\ t name:\ t\ t English result:\ t\ t maths grade:\ t\ tPython grade:\ t\ t total grade:') for item in student_qurey: if dict (eval (item)) ['id'] = = id: P = dict (eval (item) ) print ('{0}\ t\ t {1}\ t {2}\ t\ t {3}\ t {4}\ t\ t {5} '.format (p [' id']) P ['name'], p [' english'], p ['math'], p [' Python'], float (p ['english']) + float (p [' math']) + float (p ['Python'])) else: print (' check no such person!') Elif mode = = 2: # query by name name = input ('Please enter the student's name:') if name in name_list: print ('already found the student:') print ('ID\ t\ t\ T name:\ t\ t English score:\ t\ t maths score:\ t\ tPython score:\ t\ t Total score:') for item in student_qurey: if dict (eval (item)) ['name'] = = name: P = dict (eval (item)) Print ('{0}\ t\ t {1}\ t {2}\ t\ t {3}\ t\ t {4}\ t\ t {5} '.format (p [' id']) P ['name'], p [' english'], p ['math'], p [' Python'], float (p ['english']) + float (p [' math']) + float (p ['Python'])) else: print (' check no such person!') Else: print ('input error, you can only choose 1 / 2 / 2 mode!') Answer = input ('do you want to continue the query? (y or answer N)') if answer = ='Y'or answer = = 'y': continue elif answer = =' N' or answer = = 'nasty: print (' exiting query..') Break else: print ('input error, about to return to the main interface') Break else: print ('No student information file!') Return 5. Delete student information

Logical structure diagram

Code

Def delete (): while True: student_id = input ('Please enter the student's ID:') if student_id! ='': if os.path.exists (filename): with open (filename,'r') Encoding = 'utf-8') as file: student_old = file.readlines () else: student_old = [] flag = False # tag whether to delete if student_old: with open (filename,' w') Encoding = 'utf-8') as wfile: for item in student_old: d = dict (eval (item)) # converted to dictionary type if d [' id']! = student_id: wfile.write (str (d) +'\ n') Else: flag = True if flag: print (student information with f'id of {student_id} has been deleted!) Else: print (f' could not find student information with id {student_id}!') Else: print ('no student information') break show () # displays the updated file information answer = input ('do you want to continue to delete student information? (y or answer N):') if answer = ='Y'or answer = = 'y': continue elif answer = =' N' or answer = = 'n': break else: print (' input error, about to return to the main interface!') Break VI. Student information modification function

Logical structure diagram

Code

Def modify (): show () if os.path.exists (filename): with open (filename, 'ringing, encoding =' utf-8') as rfile: student_old = rfile.readlines () # read the entire line of the text file directly into the list else: print ('student file information does not exist!') Student_id = input ('Please enter the ID:' of the student you want to modify) with open (filename,'w' Encoding = 'utf-8') as just_file: # determine whether students are in the system id_list = [] for i in student_old: d = dict (eval (I)) id_list.append (d [' id']) # store all students'id in id_list if student_ Id in id_list: # for item in student_old: e = dict (eval (item)) if e ['id'] = = student_id: print (' found the student!') when the student to be modified exists While True: try: e ['name'] = input (' Please enter name:') e ['english'] = input (' Please enter English grades:') e ['math'] = input (' Please enter math scores:') E ['Python'] = input (' Please enter Python score:') except ValueError: print ('data type input error! Please re-enter!') Else: break # try...except..else: execute the else statement just_file.write (str (e) +'\ n') print ('modified successfully!') when you enter an error Else: just_file.write (str (e) +'\ n') else: answer1 = input ('check no such person! , do you want to perform the insert operation? (y or answer1)') if answer1 ='Y'or answer1 = ='y': insert () else: print ('end current operation') answer = input ('do you want to continue to modify the rest of the student information? (y _ or answer):') if answer = ='Y'or answer = ='y': modify () elif answer = ='N' or answer = ='n'or answer: print ('finish the modification and will return to the main interface..') Else: print ('input error, about to return to the main interface') VII. Ranking of students' grades

Logical structure diagram

Code

Def sort (): student_new = [] if os.path.exists (filename): with open (filename,'r' Encoding = 'utf-8') as sort_file: student_list = sort_file.readlines () # unordered student information list for item in student_list: d = dict (eval (item)) student_new.append (d) # list elements are converted to dictionaries While True: try: sort_choice = int (input ('Please select sort method: 0: ascending / 1: descending\ t') except ValueError: print ('entered the wrong data type Please re-enter') else: if sort_choice = = 0: Flag = False break elif sort_choice = = 1: Flag = True break else: print ('incorrectly typed, you can only choose from 0Universe 1!') Continue while True: try: asc_choice = int (input ('Please choose which grade to sort by: English: 0 / Mathematics: 1 / python:2\ t\ t') except ValueError: print ('entered the wrong data type Please re-enter') else: if asc_choice = = 0: student_new.sort (key = lambda x: int (x ['english']) Reverse = Flag) # sort by the elements in the list show () break elif asc_choice = = 1: student_new.sort (key = lambda x: int (x ['math'])) Reverse = Flag) show () break elif asc_choice = = 2: student_new.sort (key = lambda x: int (x ['Python']) Reverse = Flag) show () break elif asc_choice = 3: student_new.sort (key = lambda x: int (x ['Python']) + int (x [' english']) + int (x ['math']) Reverse = Flag) show () break else: print ('input error You can only choose from 0Action1Comp2!') Continue else: print ('student information file does not exist!') VIII. Statistics on the number of students

Logical structure diagram

Code

Def total (): nums = 0 if os.path.exists (filename): with open (filename, 'rushing, encoding =' utf-8') as t_file: len_list = t_file.readlines () for i in range (len (len_list)): if len_ list [I]! ='': nums + = 1 print ('current total number of students is:' Nums) print ('Please select the next step you want to do:') else: print ('No student information file') IX. Display all student information

Logical structure diagram

Code

Def show (): if os.path.exists (filename): with open (filename,'r' Encoding = 'utf-8') as show_file: student_list = show_file.readlines () if student_list: print ('-all student information is as follows -) print ('ID\ t\ t\ t name:\ t\ t English grade:\ t\ t maths grade:\ t\ tPython grade:\ t\ t Total score:') for item in student_list: P = dict (eval (item)) print ('{0}\ t\ t {1}\ t {2}\ t\ t {3}\ t {4}\ t {5} '.format (p [' id']) P ['name'], p [' english'], p ['math'], p [' Python'], float (p ['english']) + float (p [' math']) + float (p ['Python'])) else: print (' no student information yet!') Else: print ('No student information yet!') Program packaging

On the pycharm terminal or the python command interface, use:

Pip install PyInstaller

Download the python package, and when the download is complete, do the following:

Pyinstaller-F F:\ xxxx\ xxx\ xx\ x.py

Where:

-F stands for packaging the program into a single exe file

F:\ xxx\ xxx\ xx.py is the absolute address of your student performance management system files

After the packaging is completed, the penultimate line of the prompt message: the location of the exe file is after the Appending statement. If there is no special display, it is under the parent file of the current directory.

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