這是一個(gè)簡易的員工管理系統(tǒng)，實(shí)現(xiàn)最簡單的功能：

1.登錄用戶密碼驗(yàn)證（錯(cuò)誤三次自動(dòng)退出）
2.支持文本員工的搜索、添加、刪除、修改
3.一級(jí)層級(jí)多個(gè)選項(xiàng)、二級(jí)層級(jí)多個(gè)選項(xiàng)，都支持判空、退出、返回上一層級(jí)
4.針對(duì)刪除和修改有員工當(dāng)前自動(dòng)搜索到的結(jié)果進(jìn)行參照修改和特殊提醒是否刪除

用到的基礎(chǔ)知識(shí)點(diǎn)比較多：

1.計(jì)數(shù)器
2.while True 以及給while做退出層級(jí)標(biāo)記
3.if…elif…else 的嵌套使用
4.continue 和 break 以及簡單函數(shù)定義def
5.鍵盤抓取 raw_input 以及通過 os.system(‘clear')來調(diào)用linux中shell下的命令。
6.文本的讀取寫入原理（單讀的不能實(shí)際寫入，只能通過轉(zhuǎn)存文本覆蓋寫入。）
如果是‘a(chǎn)+'則只為讀取并可通過'writelines()'來寫入，是追加寫入
如果是‘w+'則為寫入，可通過‘writelines()'來寫入，是覆蓋寫入
7.列表的構(gòu)成原理，列表的轉(zhuǎn)換，列表的定位以及下標(biāo)獲取 listname.index(line)
8.特別需要注意程序執(zhí)行前后順序以及嚴(yán)格的縮進(jìn)格式

#!/usr/bin/env python# _*_ coding:utf-8 _*_import sysimport os#系統(tǒng)的用戶登錄#os.system('clear')time = 0while True: #this is login  if time < 3:    name = raw_input("/033[1mplease input your login account:").strip()    passwd = raw_input("/033[1mplease input your login password:").strip()    if len(name) == 0:        #.strip()意為去除空格      print("/033[31mIt's not allow empty input!/n")      continue    elif name == 'zhangjun' and passwd == '123.com':      print("/033[32mYour account and password right!")      pass    else:      print("/033[31mYour account or password error!")      time += 1      continue    break  else:    print("/033[31mYou are wrong three times, has already quit from the system!")    sys.exit()#系統(tǒng)的選擇界面#os.system('clear')print ('/n')def display(): #進(jìn)行登陸后界面的函數(shù)定義，方便在下面的選用層級(jí)后，返回上一層時(shí)，依然可以看到選擇大屏。 print("/033[34m########################################################################") print("/033[34m/t######### /033[1;32mWelcome to this employee search system!/033[0;34m #########") print("/033[34m/t/t#################################################") print("/n") print("/033[32m/033[1m/t/t/t1/033[33m/033[1m.Search.(you can search the infomation for employee!)/n") print("/033[32m/033[1m/t/t/t2/033[33m/033[1m.Add.(Add a user into this employee system!)/n") print("/033[32m/033[1m/t/t/t3/033[33m/033[1m.Delete.(Delete a user from this employee system!)/n") print("/033[32m/033[1m/t/t/t4/033[33m/033[1m.Modify.(You can modify something infomation in this employee system!)/n") print("/033[32m/033[1m/t/t/t5/033[33m/033[1m.Quit.(quit this employee system!)/n") print("/n") dict ()#指定文件路徑path = 'D:/Users/Franzhang/employee_list.txt'#定義while層級(jí)標(biāo)記break_tag1 = 0 以及登陸初始提示break_tag1 = 0while break_tag1 == 0: display() select_input = raw_input ("/033[37m/033[1mplease input you want to select items:").strip () if len(select_input) == 0:  continue elif select_input == 'quit':  sys.exit () #選項(xiàng)1進(jìn)行模糊搜索 elif int(select_input) == 1:  # os.system('clear')  break_tag2 = 0  while break_tag2 == 0:   content_open = open (path)   search_input = raw_input ("please input your need (SEARCH MODE):").strip ()   for line in content_open:    if len (search_input) == 0:     continue    elif search_input in line:     print line    else:     if search_input == 'all': #展示文本目前所有員工      print line     elif search_input == 'quit':      break_tag2 = 1 #返回上一層級(jí)選擇項(xiàng) #選項(xiàng)2進(jìn)行員工信息添加（其實(shí)是添加了一行列表） elif int(select_input) == 2:  # os.system('clear')  content_write = file (path, 'a+') #讀入文本  break_tag3 = 0  while break_tag3 == 0:   addid_input = raw_input ("please input your need (ADD_ID):").strip ()   if len (addid_input) == 0:    continue   elif addid_input == 'quit':    break_tag3 = 1    content_write.close () #文本使用完畢后需要關(guān)閉，以免占用內(nèi)存。    break   addname_input = raw_input ("please input your need (ADD_NAME):").strip ()   if len (addid_input) == 0:    continue   elif addname_input == 'quit':    break_tag3 = 1    content_write.close ()    break   addage_input = raw_input ("please input your need (ADD_AGE):").strip ()   if len (addid_input) == 0:    continue   elif addage_input == 'quit':    break_tag3 = 1    content_write.close ()    break   adddpt_input = raw_input ("please input your need (ADD_DPT):").strip ()   if len (addid_input) == 0:    continue   elif adddpt_input == 'quit':    break_tag3 = 1    content_write.close ()    break   addphone_input = raw_input ("please input your need (ADD_phone):").strip ()   if len (addid_input) == 0:    continue   elif addphone_input == 'quit':    break_tag3 = 1    content_write.close ()    break   list_add = [addid_input, '/t', addname_input, '/t', addage_input, '/t', adddpt_input, '/t', addphone_input,'/n'] #將上面的單項(xiàng)錄入寫入列表list_add   content_write.writelines (list_add) #將列表追加寫入文本   print("It's already insert the list!")   continue #選項(xiàng)3進(jìn)行員工刪除 elif int(select_input) == 3:  # os.system('clear')  break_tag4 = 0  while break_tag4 == 0:   content_opend = open (path)   delete_input = raw_input ("please input your need (DELETE):").strip ()   if len (delete_input) == 0:    continue   elif delete_input == 'quit':    break_tag4 = 1   for line in content_opend:    if delete_input in line:     print line     sure = raw_input ("Are you sure delete this account line ? (yes/no):").strip ()     if len (sure) == 0:      continue     elif sure == 'yes':      inside = file (path, 'a+')       bebe = inside.readlines () #按行讀入文本并轉(zhuǎn)換為列表data      data = list (bebe)       for i in data:       if delete_input in i:         w = data.index (i) #獲取輸入的員工在整個(gè)文本列表的位置        del data[w] #刪除單行      data_in = data #轉(zhuǎn)存刪除后的文本列表（這個(gè)時(shí)候被讀取的經(jīng)過刪除后的內(nèi)容還在內(nèi)存中。）      inside.close () #轉(zhuǎn)存后在關(guān)閉文本，否則導(dǎo)致轉(zhuǎn)存因提前關(guān)閉而無效。      inside_w = file (path, 'w+') #再次以覆蓋寫入方式讀取文本      inside_w.writelines (data_in) #將剛才轉(zhuǎn)存的文本寫入      inside_w.close () #關(guān)閉文本后會(huì)自動(dòng)保存寫入      break     elif sure == 'no':      break    continue #選項(xiàng)4進(jìn)行員工信息更改（整條員工信息的更改） elif int(select_input) == 4:  break_tag5 = 0  while break_tag5 == 0:   modify_input = raw_input ("please input your modify item:").strip ()   if len (modify_input) == 0:    continue   elif modify_input == 'quit':    break   content_modify = file (path, 'a+')   modify_line = content_modify.readlines ()   modata = list (modify_line)   for i in modata:    if modify_input in i:     ms = modata.index (i)#獲取輸入變量的最終列表定位     print i     mosure = raw_input ("Are you sure to change this user ? (yes/no):").strip ()     if len (mosure) == 0:      continue     elif mosure == 'yes':      break_tag6 = 0      while break_tag6 == 0:       sureid_input = raw_input ("please input you will change this user id: ").strip ()       if len(sureid_input) == 0:        continue       elif sureid_input == 'quit':        break       surename_input = raw_input ("please input you will change this user name:").strip ()       if len(surename_input) == 0:        continue       elif surename_input == 'quit':        sureid_input = None #此處賦空值，為了防止中途退出，而出現(xiàn)個(gè)別寫入        surename_input = None        break       sureage_input = raw_input ("please input you will change this user age:").strip ()       if len(sureage_input) == 0:        continue       elif sureage_input == 'quit':        sureid_input = None        surename_input = None        sureage_input = None        break       suredep_input = raw_input ("please input you will change this user department:").strip ()       if len(suredep_input) == 0:        continue       elif suredep_input == 'quit':        sureid_input = None        surename_input = None        sureage_input = None        suredep_input = None        break       surephone_input = raw_input ("please input you will change this user phone:").strip ()       if len(surephone_input) == 0:        continue       elif surephone_input == 'quit':        sureid_input = None        surename_input = None        sureage_input = None        suredep_input = None        surephone_input = None        break       later_sure = [sureid_input, '/t', surename_input, '/t/t', sureage_input, '/t', suredep_input,'/t', surephone_input, '/n']#將上面的值放入列表       del modata[ms] #當(dāng)整個(gè)輸入完成以后再進(jìn)行刪除，防止中途退出未完成狀體的刪除。       modata_one = modata       content_modify.close () #這里還是使用了刪除、轉(zhuǎn)存、重新寫入的原理       content_modify_list = file (path, 'w+')       content_modify_list.writelines (modata_one)       content_modify_list.close ()       content_modify_list_one = file (path, 'a+')       content_modify_list_one.writelines (later_sure)       content_modify_list_one.close ()       break     elif mosure == 'quit' or 'no':      break elif int (select_input) == 5:  print("Thank you for use this employee system, write by franzhang!")  sys.exit()