学员信息表

作业：

有以下员工信息表

当然此表你在文件存储时可以这样表示


1

1,Alex Li,22,13651054608,IT,2013-04-01

现需要对这个员工信息文件，实现增删改查操作

  1. 可进行模糊查询，语法至少支持下面3种:

    1. 　　select name,age from staff_table where age > 22
    2. 　　select  * from staff_table where dept = "IT"
    3. select  * from staff_table where enroll_date like "2013"
    4. 查到的信息，打印后，最后面还要显示查到的条数
  2. 可创建新员工纪录，以phone做唯一键，staff_id需自增
  3. 可删除指定员工信息纪录，输入员工id，即可删除
  4. 可修改员工信息，语法如下:
    1. 　　UPDATE staff_table SET dept="Market" WHERE where dept = "IT"

 注意：以上需求，要充分使用函数，请尽你的最大限度来减少重复代码！

下面是代码

#!/usr/bin/env python3# -*- coding: utf-8 -*-#user:Felix#date:2016-11-1#mail:[email protected]#If you have questions or suggestions, please contact the author.import osimport timeimport reimport shutildef data(data):    data=data.strip().replace(","," ").split(" ")    # if data[0] == "select":    #     print("select")    # elif data[0] == "update":    #     print("update")    # elif data[0] == "insert":    #     print("insert")    # elif data[0] == "delete":    #     print("delete")    # else:    #     print("输入语法有问题")    tag=False    for i in student_list[0]:        if i in data:            column.append(i)    for i in data:        if i == "where":            tag=True            continue        if tag:            condition.append(i)    return column,condition

def select(data):    select_list=[]    data=data.replace("select","").replace("from","").replace("staff_table where","")    #print(data) # *   age <= 22    mark=student_list[0].index(if_information[1][0]) #select name,age from staff_table where occupation like I    for i in student_list:        if i == student_list[0]:continue #如果是列名就跳出        #print("i[mark]  ",i[mark],"if_information[1][2]  ",if_information[1][2],"***",type(i[mark]),"  ",type(if_information[1][2]))        #if i[mark].isdigit():i[mark]=int(i[mark])        #if if_information[1][2].isdigit():if_information[1][2]=int(if_information[1][2])        if if_information[1][2].isdigit():            if if_information[1][1] == ">":                if int(i[mark]) > int(if_information[1][2]):select_list.append(i)#print(i)            elif if_information[1][1] == "=":                if int(i[mark]) == int(if_information[1][2]):select_list.append(i)#print(i)            elif if_information[1][1] == "<":                if int(i[mark]) < int(if_information[1][2]):select_list.append(i)#print(i)            elif if_information[1][1] == ">=":                if int(i[mark]) >= int(if_information[1][2]):select_list.append(i)#print(i)            elif if_information[1][1] == "<=":                if int(i[mark]) <= int(if_information[1][2]):select_list.append(i)#print(i)            elif if_information[1][1] == "!=":                if int(i[mark]) != int(if_information[1][2]):select_list.append(i)#print(i)            elif if_information[1][1] == "like":                if if_information[1][2] in i[mark]:select_list.append(i)#print(i)            else:print("您的输入有错")        #以上是 age和id int类型查询        else:            #print(i[mark],if_information[1][1],if_information[1][2])            if if_information[1][1] == "=":                if i[mark] == if_information[1][2]:select_list.append(i)#print(i)            elif if_information[1][1] == "like":                if if_information[1][2] in i[mark]:select_list.append(i)#print(i)            else:print("您的输入有错")

#以上是字符串类型查询    print_selcet_list=if_information[0]    #print(print_selcet_list,if_information[0],student_list[0])    count=[]    if "*" in data:        print(student_list[0])        for line in select_list:            print(line)        print("您一空查询到\033[1;32;31m%s\033[0m条信息!"%(len(select_list)))    else:        for i in print_selcet_list:            mark=student_list[0].index(i)            count.append(int(mark))        #print(count)        print(print_selcet_list)        for line in select_list:            if len(count) == 0:print(line[count[0]],line[count[1]],line[count[2]],line[count[3]],line[count[4]],line[count[5]])            elif len(count) == 1:print(line[count[0]])            elif len(count) == 2:print(line[count[0]],line[count[1]])            elif len(count) == 3:print(line[count[0]],line[count[1]],line[count[2]])            elif len(count) == 4:print(line[count[0]],line[count[1]],line[count[2]],line[count[3]])            elif len(count) == 5:print(line[count[0]],line[count[1]],line[count[2]],line[count[3]],line[count[4]])            elif len(count) == 6:print(line[count[0]],line[count[1]],line[count[2]],line[count[3]],line[count[4]],line[count[5]])        print("您一空查询到\033[1;32;31m%s\033[0m条信息!"%(len(select_list)))        # for line in select_list:        #     for i in count:        #        #         print(line[int(i)])    return select_list

def update(data_update):    #UPDATE staff_table SET dept="Market" WHERE dept = "IT"    #update staff_table set dept=market where dept = it    # print(data_update)    # print(if_information)    data1=data(data_update)[1]    news_ids = []    for id in data1:        if id not in news_ids:            news_ids.append(id)    news_ids.insert(0,"*")    # print(type(news_ids))    # print(news_ids)    select_list=select("".join(news_ids))    awk=data_update.strip().replace(","," ").split(" ")[3:6]    select_list_id=student_list[0].index(awk[0])    with open("dbnew","w",encoding="utf-8") as write_file:        #print(",".join(student_list[0]))        print(student_list[0])        write_file.write(",".join(student_list[0])+"\n")        for i in range(len(select_list)):            student_list.remove(select_list[i])            select_list[i][select_list_id]=awk[2]            print(select_list[i])            string=",".join(select_list[i])            #print(string)            write_file.write(string+"\n")        for s in student_list:            if "staff_id" in s:continue            #print(s)            else:write_file.write(",".join(s)+"\n")        print("您已经修改\033[1;32;31m%s\033[0m条信息!"%(len(select_list)))

#现在已经查出来了 写入新文件并同时修改        #print(awk)    write_file.close()    dbbak="dbbak"+time.strftime("%Y-%m-%d-%H-%M-%S",time.localtime(time.time()))    shutil.copyfile("db",dbbak)    os.remove("db")    os.renames("dbnew","db")

# with open("db","r",encoding="utf-8") as read_file,\    #     open("dbnew","w",encoding="utf-8") as write_file:    #     for r_line in read_file:    #         for w_line in write_file:    #             if

#for line in student_list:        #line

def insert(data):

data = re.split(‘\(|\)‘,data)[-2].replace(" ","")    data1= re.split(‘\(|\)‘,data)    #print(data1)    for line in student_list:        if line[3] in data:            print("新增用户手机号与老用户\033[1;32;31m%s\033[0m有冲突"%line)            break    else:        sum=[]        with open("db","r",encoding="utf-8") as read_file,\            open("dbnew","w",encoding="utf-8") as write_file:            for r_line in read_file:                if "staff_id" not in  r_line:sum.append(r_line.split(",")[0])                write_file.write(r_line)            #print(type(",".join(data)))            # print(str(int(sum[-1])+1))            id=int(sum[-1])+1            # print(type(id))            # print(type(repr(id)))            #write_file.write("\n"+repr(int(sum[-1])+1)+","+",".join(data))            new_line="\n"+repr(id)+","+data            write_file.write(new_line)        # read_file.close()        # write_file.close()        dbbak="dbbak"+time.strftime("%Y-%m-%d-%H-%M-%S",time.localtime(time.time()))        shutil.copyfile("db",dbbak)        os.remove("db")        os.renames("dbnew","db")

def delete(data_del):    #DELETE FROM staff_table WHERE staff_id = 1    print(data_del)    delete=data(data_del)[1][3:6]    delete.insert(0,"*")    print(delete)    select_list=select("".join(delete))    awk=data(data_del)[1][3:6]    print(awk)    select_list_id=student_list[0].index(awk[0])    with open("dbnew","w",encoding="utf-8") as write_file:        #print(",".join(student_list[0]))        print(student_list[0])        write_file.write(",".join(student_list[0])+"\n")        for i in range(len(select_list)):            student_list.remove(select_list[i])            # select_list[i][select_list_id]=awk[2]            print(select_list[i])            # string=",".join(select_list[i])            # #print(string)            # write_file.write(string+"\n")        for s in student_list:            if "staff_id" in s:continue            #print(s)            else:write_file.write(",".join(s)+"\n")    print("您已经删除\033[1;32;31m%s\033[0m条信息!"%(len(select_list)))    write_file.close()    dbbak="dbbak"+time.strftime("%Y-%m-%d-%H-%M-%S",time.localtime(time.time()))    shutil.copyfile("db",dbbak)    os.remove("db")    os.renames("dbnew","db")

if __name__ == "__main__":    student_list=[]    f=open("db","r",encoding="utf-8")    for line in f:        line=line.strip().split(",")        student_list.append(line)

#print(student_list)    # msg=‘‘‘    # 1:查询    # 2:添加    # 3:删除    # 4:修改    # 5:退出    # ‘‘‘    # menu_dic={    #     ‘1‘:select,    #     ‘2‘:insert,    #     ‘3‘:delete,    #     ‘4‘:update,    #     ‘5‘:"",    # }    while True:        column=[]        condition=[]        #print(msg)        choice=input("数据>>: ").strip().lower().replace("\"","").replace("\‘","").replace(";","")        #choice="""INSERT INTO `staff_table`.`staff` VALUES (‘刘耀‘, ‘20‘, ‘17777777777‘,‘运维‘,"2011-11-11");"""        #choice=choice.strip().lower().replace("\"","").replace("\‘","").replace(";","")        #print(choice)        str=choice        if_information=list(data(str)) #[[‘name‘, ‘age‘], [‘age‘, ‘>‘, ‘22‘]]        #print("if_information==",if_information)        choice_def=choice.strip().replace(","," ").split(" ")        f.close()        if choice_def[0] == "select":            select(str)        elif choice_def[0] == "update":            update(str)        elif choice_def[0] == "insert":            insert(str)        elif choice_def[0] == "delete":            delete(str)        else:            print("输入语法有问题")        # if len(choice) == 0 or choice not in menu_dic:continue        # if choice == "5":break        #str=input("数据>>: ").strip()        # str="select name,age from staff_table where age > 22"        # if_information=list(data(str))        # menu_dic[choice](str)        #print(if_information)        # select name,age from staff_table where age > 22        # select name,age from staff_table where dept like I
时间： 2024-11-09 04:00:59

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