Python基於mysql實現學生管理系統
阿新 • • 發佈:2020-01-09
本篇文章主要介紹了Python基於mysql實現學生管理系統,分享給大家,具體如下:
import pymysql import re def idinput(string): ID = input(string) pattern = re.compile("^\d{1,3}$") while not re.match(pattern,ID): ID = input("請輸入1-3位整數:") return ID def appendStudentInfo(): ID =idinput("請輸入學生學號:") db=pymysql.connect(host="127.0.0.1",user="root",passwd="hisense",db="test",port=3306,charset="utf8") cursor=db.cursor() sql = "select * from StuSys where ID = '%s'" % ID cursor.execute(sql) while cursor.rowcount > 0 : ID = idinput("該學號已存在,請重新輸入:") sql = "select * from StuSys where ID = '%d'" % int(ID) cursor.execute(sql) name=input("請輸入學生姓名:") chinese=input("請輸入語文成績:") while not chinese.isdigit() or int(chinese)>100 or int(chinese)<0: chinese = input("輸入錯誤,請重新輸入:") math =input("請輸入數學成績:") while not math.isdigit() or int(math) > 100 or int(math) < 0: math = input("輸入錯誤,請重新輸入:") english=input("請輸入英語成績:") while not english.isdigit() or int(english) > 100 or int(english) < 0: english = input("輸入錯誤,請重新輸入:") total=int(chinese)+int(math)+int(english) sql="""INSERT INTO StuSys(ID,NAME,CHINESE,ENGLISH,MATH,TOTAL) VALUES (%s,%s,%s)""" cursor.execute(sql,(ID,name,chinese,english,math,total)) db.commit() db.close() def delstudent(): delstudentid = idinput("請輸入要刪除的學生學號:") if querystudent(delstudentid): select = input("是否刪除:是(Y)/否(N)") if select == "Y" or select == "y": db = pymysql.connect(host="127.0.0.1",charset="utf8") cursor = db.cursor() sql = "delete from stusys where ID =%s" %delstudentid cursor.execute(sql) db.commit() db.close() print("刪除成功") elif select == "N" or select == "n": print("取消刪除") else: print("輸入錯誤") def querystudent(querystudentid): db=pymysql.connect(host="127.0.0.1",charset="utf8") cursor=db.cursor() sql="select * from stusys where ID=%s"%querystudentid cursor.execute(sql) if cursor.rowcount ==0 : print("不存在該學生資訊") return False else: print("該學生資訊如下:") results =cursor.fetchall() print("ID=%d,NAME=%s,CHINESE=%d,ENGLISH=%d,MATH=%d,TOTAL=%d" % \ (results[0][0],results[0][1],results[0][2],results[0][3],results[0][4],results[0][5])) return True def modifystudentifo(): modifyid = idinput("請輸入要的學生學號:") if querystudent(modifyid): name = input("請重新輸入學生姓名:") chinese = input("請重新輸入語文成績:") while not chinese.isdigit() or int(chinese) > 100 or int(chinese) < 0: chinese = input("輸入錯誤,請重新輸入:") math = input("請重新輸入數學成績:") while not math.isdigit() or int(math) > 100 or int(math) < 0: math = input("輸入錯誤,請重新輸入:") english = input("請重新輸入英語成績:") while not english.isdigit() or int(english) > 100 or int(english) < 0: english = input("輸入錯誤,請重新輸入:") total = int(chinese) + int(math) + int(english) db = pymysql.connect(host="127.0.0.1",charset="utf8") cursor = db.cursor() sql1="update stusys set name ='%s' where id = %s"%(name,modifyid) cursor.execute(sql1) sql2="update stusys set math = %s where id = %s"%(math,modifyid) cursor.execute(sql2) sql3 = "update stusys set english = %s where id =%s"%(english,modifyid) cursor.execute(sql3) sql4 = "update stusys set total = %s where id = %s"%(total,modifyid) cursor.execute(sql4) sql5 = "update stusys set chinese = %s where id = %s"%(chinese,modifyid) cursor.execute(sql5) db.commit() db.close() def allinfo(): db=pymysql.connect(host="127.0.0.1",charset="utf8") cursor=db.cursor() sql="select * from stusys" cursor.execute(sql) results= cursor.fetchall() for row in results: ID = row[0] NAME = row[1] CHINESE = row[2] ENGLISH = row[3] MATH = row[4] TOTAL = row[5] # 列印結果 print("ID=%d,TOTAL=%d" % \ (ID,TOTAL)) def studentMenu(): print("="*30) print("學生管理系統") print("1、新增學生資訊") print("2、刪除學生資訊") print("3、查詢學生資訊") print("4、修改學生資訊") print("5、全部學生資訊") print("6、退出") print("="*30) if __name__ == '__main__': while True: studentMenu() menuindex = input("請輸入選項序號:") while not menuindex.isdigit(): menuindex = input("輸入錯誤,請重新輸入:") if int(menuindex) ==1: appendStudentInfo() elif int(menuindex) ==2: delstudent() elif int(menuindex) ==3: querystudentid = idinput("請輸入要查詢的學生學號:") querystudent(querystudentid) elif int(menuindex) ==4: modifystudentifo() elif int(menuindex) == 5: allinfo() elif int(menuindex) == 6: break else: print("輸入序號無效")
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支援我們。