Realization of Employee Information table display function

Readme:

1. Employee Information Form procedures, to achieve additions and deletions to check the operation:

1). Can be fuzzy query, syntax support at least the following 3 kinds:
Select Name,age from staff_table where age > 22
SELECT * from staff_table where dept = "IT"
SELECT * from staff_table where enroll_date like "2013"
Finally shows the number of bars found
2). Can create a new employee record, with phone to do unique key, staff_id need to increase
3). Delete the specified employee information record, enter an employee ID, and delete
4). Can modify employee information, the syntax is as follows:
UPDATE staff_table SET dept= "Market" WHERE dept = "IT"

Flow chart:

Code:

# coding:utf8import Sysimport Redef Select (Staff, field): cmd = input ("cmd>"). Strip () cmd = Cmd.replace (' From ', ' From ') cmd = Cmd.replace (' where ', ' where ') if ' * ' in cmd:for i in Field.keys (): Sys.stdout.write (str (i) + ' Print (") for line in staff:info_list = Re.split (R ', + ', Line.strip (' \ n ')) Cmd_list = Re.split (R ' [,;] + ', cmd) F_index = Cmd_list.index (' from ') Search_field = Cmd_list[1:f_index] From_field = cmd_list[f_ Index + 1]if From_field! = ' staff_table ':p rint (' \033[31;1mplease select ' staff_table ' ... \033[0m ') breakif ' where ' not in C md_list:# does not exist where condition, shows all view_list = []for i in Range (len (Search_field)): if search_field[i] = = ' * ': Vie W_list = Info_list[:]else:view_list.append (Info_list[field.get (Search_field[i])) else:print (', '. Join (V iew_list)) else:# exists where condition W_index = Cmd_list.index (' where ') Where_str = '. Join (Cmd_list[w_index + 1:]) if re.se      Arch (R ' like ', WHERE_STR):          sizeof = ' like ' where_list = Re.split (R ' like ', where_str) else:sizeof = Re.search (R ' [=><]+ ', WHERE_STR). Group () Where_list = Re.split (R ' [=><]+ ', where_str) Where_field = where_list[0                ] Value = where_list[1]if Re.search (r ' [\ ' \ ']+ ', value): # with ' and ' representing characters, processing off ' and ' value = value.replace (' \ ' ', ')  Value = Value.replace (' \ ', ') Else:value = float (value) # print (Where_str, Where_field, sizeof,  Value) # conditional judgment;, <, =, likeif sizeof = = ' > ': v = info_list[field.get (Where_field)]if float (v) >                            Value:view_list = []for i in Range (len (Search_field)): if search_field[i] = = ' * ': View_list = Info_list[:]else:view_list.append (Info_list[field.get (Search_field[i])) Els E:print (', '. Join (view_list)) elif sizeof = = ' < ': v = info_list[field.get (Where_field)]if float (v) < VA                    LueView_list = []for i in Range (len (Search_field)): if search_field[i] = = ' * ': view_list = Info_lis T[:]else:view_list.append (Info_list[field.get (Search_field[i])) else:print (', '. Join (View_list)                    ) elif sizeof = = ' = ': v = info_list[field.get (Where_field)]if field.get (where_field) = = 2:                             v = Float (v) if v = = Value:view_list = []for i in Range (len (Search_field)): if search_field[i] = = ' * ': View_list = Info_list[:]else:view_list.append (Info_list[field.get ( Search_field[i]) else:print (', '. Join (view_list)) elif sizeof = = ' like ': v = info_list[field.get (Where_field                            )]if value in v:view_list = []for i in Range (len (Search_field)): if search_field[i] = = ' * ': View_list = Info_list[:]else:view_list.append (Info_list[field.get (Search_field [i])]) Else:print (', '. JoiN (view_list)) else:passdef Add (Staff): staff.sort () num = Int (re.split (R ', ', staff[-1]) [0]) + 1phone = input ("Phone:" ). Strip () for line in staff:if phone = = line[3]:p rint ("already exists ...") return Falseif not Re.match (R ' ^\d+$ ', phone) or L En (Phone) < 7:print ("format error ...") return False name = input ("Name:"). Strip () Age = Input ("Age:"). Strip () d EPT = Input ("dept:"). Strip () Enroll_date = input ("enroll_date:"). Strip () for S in (name, age, Dept, enroll_date): If not Len (s):p rint ("Input is null ...") return Falseelse:staff.append ('%s,%s,%s,%s,%s,%s\n '% (num, name, age, Phone, dept , enroll_date)) return staffdef update (Staff, field): cmd = input ("cmd>"). Strip () up_list = [] cmd = Cmd.replac E (' Set ', ' Set ') cmd = Cmd.replace (' where ', ' where ') for line in staff:info_list = Re.split (R ', + ', Line.strip (' \ n ') Cmd_list = Re.split (R ' [,;] + ', cmd) if cmd_list[1]! = ' staff_table ':p rint (' \033[31;1mplease update ' staff_table ' ... \033[0m ') breakset_index = Cmd_list.index (' set ') Where_index = Cmd_list.index (' where ') Set_list = Re.split (R ' = ', ' ". Join (cmd_list[ Set_index + 1:where_index]) Set_field = set_list[0] Set_value = set_list[1]if Re.search (r ' [\ ' \ ']+ ', set_val UE): Set_value = set_value.replace (' \ ', ') Set_value = Set_value.replace (' \ "', ') where_li St = Re.split (R ' = ', '. Join (Cmd_list[where_index + 1:])) Where_field = where_list[0] Where_value = Where_lis  T[1]if Re.search (r ' [\ ' \ ']+ ', where_value): Where_value = where_value.replace (' \ ', ') Where_value = Where_value.replace (' \ ' ', ') if Info_list[field.get (where_field)] = = Where_value:info_list[field.get (Set_fiel    d)] = Set_valueprint (', '. Join (Info_list)) up_list.append (', '. Join (info_list)) Else:return up_listdef Delete (staff): del_id = input ("Delete ID:"). Strip () for I in Range (len): If Re.split (R ', ', Staff[i]) [0] = = Del_id:sta Ff.pop (i) print ("id:%s delete success. "% del_id) return Staffelse:return falsedef main (): staff_table = ' staff_table.txt ' field = {' staff_id ': 0,   ' Name ': 1, ' age ': 2, ' phone ': 3, ' dept ': 4, ' Enroll_date ': 5} menu = ' ' \033[33;1m--staff_table--\033[0m\033[29;1ms. Query H. Help A. Added Q. Exit E. Modify D.            Delete \033[0m ' Print (menu) while True:try:with open (staff_table, ' R ') as F:staff = F.readlines () Choice = input (">>"). Strip (). Lower () if choice = = ' h ': # Helpprint (menu) elif choice = ' Q ': Breakelif choic E = = ' s ': # Search Select (Staff, field) elif choice = = ' A ': # Addresult = Add (staff) if not result:print (' \ 033[31;1madd failed...\033[0m ') Continueelse:with open (staff_table, ' W ') as F:f . Writelines (Result) elif choice = = ' E ': # Updateresult = Update (staff, field) if not Result:print (' \033[31;1mupdate failed. ..                       \033[0m ') Continueelse:with open (staff_table, ' W ') as F:for line in result:     F.write (line + ' \ n ') elif choice = = ' d ': # Deleteresult = delete (staff) if not result:print (' \033[31;1mdelete failed. . \033[0m ') Continueelse:with open (staff_table, ' W ') as F:f.writelines (result) El Se:continueexcept:print ("\033[31;1minput error...\033[0m") continueif __name__ = = ' __main__ ': Main ()

View Code