Python implements the student management system and python student management system

Python implements the student management system and python student management system

A simple student management system written in python to practice the python syntax.

You can run python 2.7 on windows and linux.

#! /Usr/local/bin/python #-*-coding: UTF-8-*-import OS import re # define Student class Student: def _ init _ (self): self. name = ''self. ID = ''self. score = 0 # Sort def BuddleSortByScore (stulist): n = len (stulist) for I in range (n) based on the students' scores in a bubble sequence ): for j in range (n-I-1): if stulist [j]. score <stulist [j + 1]. score: # tmp = stulist [j + 1] # stulist [j + 1] = stulist [j] # stulist [j] = tmp stulist [j], stulist [j + 1] = Stulist [j + 1], stulist [j] # outputs information of all students in sequence def PrintAllStudentInfo (stulist ): print u "______________________ student list _______________" for I in range (len (stulist): print u "name:", print stulist [I]. name, print "", print u "student ID:", print stulist [I]. ID, print "", print u "score:", print stulist [I]. score print "________________________________________________" # Add a student and return True if the student is added successfully. Otherwise, False def Add (stulist, st is returned. U): if searchByID (stulist, stu. ID) = 1: print u "this ID already exists! "Return False stulist. append (stu) # specifies whether to save the updated data. print" Do you want to save the result? "NChoose = raw_input (" Choose: Y/N: ") if nChoose = 'y' or nChoose = 'y': # Write the changed result to the file, append Write File file_object = open ("students.txt", "a") file_object.write (stu. ID) file_object.write ("") file_object.write (stu. name) file_object.write ("") file_object.write (str (stu. score) file_object.write ("\ r \ n") file_object.close () return True else: stulist. remove (stu) # Delete the student information based on the ID. If the student information is deleted successfully, True is returned. Otherwise, false d is returned. Ef DeleteByID (stulist, ID): for stu in stulist: if stu. ID = ID: stulist. remove (stu) # select whether to save the changed content print "Do you want to save the changed result? "NChoose = raw_input (" Choose: Y/N: ") if nChoose = 'y' or nChoose = 'y': file_object = open (" students.txt ", "w +") for stu2 in stulist: file_object.write (stu2.ID) file_object.write ("") file_object.write (stu2.name) file_object.write ("") file_object.write (str (stu2.score )) file_object.write ("\ r \ n") file_object.close () print u "deleted successfully! "Return True print u" failed to delete! "Return False # True is returned if a student is deleted successfully based on the name. Otherwise, False def DeleteByName (stulist, name): pos = searchByName (stulist, name) if pos! is returned! =-1: del stulist [pos] # select whether to save the changed content print "Do you want to save the changed result? "NChoose = raw_input (" Choose: Y/N: ") if nChoose = 'y' or nChoose = 'y': file_object = open (" students.txt ", "w +") for stu2 in stulist: file_object.write (stu2.ID) file_object.write ("") file_object.write (stu2.name) file_object.write ("") file_object.write (str (stu2.score )) file_object.write ("\ r \ n") file_object.close () print u "deleted successfully! "Return True else: print u" failed to delete! "Print pos return False # check whether a student exists based on the student ID. If a student has a subscript in the list,-1 def searchByID (stulist, ID) is returned ): for I in range (len (stulist): if stulist [I]. ID = ID: print u "name:", print stulist [I]. name, print "", print u "student ID:", print stulist [I]. ID, print "", print u "score:", print stulist [I]. score return I return-1 # check whether a student exists according to the name, and return the subscript of the student in the list; otherwise, return-1 def searchByName (stulist, name ): for I in range (len (s Tulist): if stulist [I]. name = name: print u "name:", print stulist [I]. name, print "", print u "student ID:", print stulist [I]. ID, print "", print u "score:", print stulist [I]. score return I return-1 # initialization, reading files, updating student information def Init (stulist): print u "initialization ...... "file_object = open (" students.txt "," r ") # Read the information of Middle School Students in a file by row for line in file_object: stu = Student () line = line. strip ("\ n") s = line. split ("") stu. ID = S [0] stu. name = s [1] stu. score = s [2] stulist. append (stu) print u "initialization successful! "# Query menu def QueryMenu (stulist): while True: print "*****************************" print u "based on the student's student ID search ------- 1 "print u" by Student name search ------- 2 "print u" Left search module ---------------- 3 "print "************ * ***************** "nChoose = raw_input (" Enter your choice ") if nChoose = "1": ID = raw_input ("Enter the ID you want to search for:") searchByID (stulist, ID) elif nChoose = "2 ": name = raw_input ("Enter the name you want to search for:") searchByName (stulist, Name) elif nChoose = "3": return else: print u "select an incorrect input. Please enter it again! "# Delete module def DeleteMenu (stulist): while True: print "***************************" print u "based on the student's student ID delete ------ 1 "print u" delete based on student name ------ 2 "print u" Remove module ------------- 3 "print "************* * **************** "nChoose = raw_input (" Please select: ") if nChoose =" 1 ": ID = raw_input (" Enter the ID you want to delete: ") DeleteByID (stulist, ID) elif nChoose =" 2 ": name = raw_input ("Enter the name you want to delete:") DeleteByName (stulist, name) Elif nChoose = "3": return else: print u "Your selection is incorrect. Please enter it again! "# Menu def menu (stulist): while True: print "**********************" print u "-------- menu ------------" print u "add student information --------- 1 "print u" search for information about a student ---- 2 "print u" delete information about a student ---- 3 "print u" output information about all students ---- 4 "print u" based on scores sort --------- 5 "print u" Exit program ------------- 6 "print" ---------------------- "print "********************** ** "nChoose = raw_input (" Enter your choice: ") if nChoose =" 1 ": stu = Student () stu. name = ra W_input ("Enter the Student name:") # match whether the student ID meets the number 0-9 while True: stu. ID = raw_input ("Enter student ID:") # create a template for compiling a regular expression p = re. compile ('^ [0-9] {3} $') if p. match (stu. ID): break else: print "student ID input error. The correct format should be three digits between 0 and 9! "# Match whether the score of a student is between 0--100 while True: stu. score = eval (raw_input ("Enter the student's score:") # Use common symbols to determine if the score meets the criteria # if stu. score> = 0 and stu. score <= 100: # break # use a regular expression to determine whether the score meets the standard if re. match ("^ [0-9]", str (stu. score) and stu. score <= 100 and stu. score> = 0: break else: print u "score does not meet the actual situation, it should be a number between 0 and! "If Add (stulist, stu) = 1: print u" student information added successfully! "Else: print u" failed to add student information! "Elif nChoose =" 2 ": QueryMenu (stulist) elif nChoose =" 3 ": DeleteMenu (stulist) elif nChoose =" 4 ": PrintAllStudentInfo (stulist) elif nChoose = "5": BuddleSortByScore (stulist) print "Do you want to save the sorted result? "Choose = raw_input (" please input your choice: Y/N: ") if choose = 'y' or choose = 'y': file_object = open (" students.txt ", "w +") for stu2 in stulist: file_object.write (stu2.ID) file_object.write ("") file_object.write (stu2.name) file_object.write ("") file_object.write (str (stu2.score )) file_object.write ("\ r \ n") elif nChoose = "6": return else: print u "is incorrect. Please enter it again! "# Test function section if _ name _ = '_ main _': # define a list to store information of all students. stulist = [] # initialization, read Information from the file Init (stulist) # menu function menu (stulist)

Run the dig command to read and write the students.txt file. The file format is as follows:

For more information, see management system development.

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