Using Python to implement a simple business card management system

Start by creating a new project that contains the main program Cards_main and the tool library Cards_tools:

As follows:

Main function mainly uses while and if to implement 4 function switching, the specific operation of the switch is performed by the function in Cards_tools. Not to mention the code directly, the code is relatively simple:

(1) Cards_main:

*Coding:utf-8 *

"""
File_name:cards_main.py
Author:jack
date:2018.7.18
Function: Business Card management System main program
"""
Import Cards_tools

Use while to implement a window's loop usage

While True:
?? Cards_tools.cards_dis ()
?? Cards_input = input ("Select operation function:")
?? If cards_input in ["1", "2", "3"]:
????? if cards_input = = "1":
???????? Print ("-"20)
???????? Print ("The action code you chose to enter is: 1")
???????? Cards_tools.cards_add ()
????? elif Cards_input = = "2":
???????? Print ("-"20)
???????? Print ("The action code you chose to enter is: 2")
???????? Cards_tools.cards_show_all ()
????? elif Cards_input = = "3":
???????? Print ("-"20)
???????? Print ("The action code you chose to enter is: 3")
???????? Cards_tools.cards_requ ()
?? elif Cards_input = = "0":
????? Print ("The action code you chose to enter is: 0")
????? Print ("Exiting system ... \ n" "has exited the system, welcome to your next" card management system "!) ")
????? Break
?? Else
????? Cards_input = input ("Input error, please re-enter:")
????? Cards_tools.cards_dis ()
????? #cards_input = input ("Input error, please re-enter:")
????? While True:
???????? Cards_input = input ("Input error, please re-enter:")
???????? Cards_tools.cards_dis ()
???????? If cards_input in ["1", "2", "3", "0"]:
??????????? if cards_input = = "1":
?????????????? Print ("-"20)
?????????????? Print ("The action code you chose to enter is: 1")
?????????????? Cards_tools.cards_add ()
?????????????? Break
??????????? if cards_input = = "2":
?????????????? Print ("-"20)
?????????????? Print ("The action code you chose to enter is: 2")
?????????????? Cards_tools.cards_show_all ()
?????????????? Break
??????????? if Cards_input = = "3":
?????????????? Print ("-"20)
?????????????? Print ("The action code you chose to enter is: 3")
?????????????? Cards_tools.cards_requ ()
?????????????? Break
??????????? Else
??????????? # #print ("Back to main Menu")
?????????????? Break
????? Break
(2) Cards_tools:

*Coding:utf-8 *

"""
File_name:cards_main.py
Author:jack
date:2018.7.18
Function: Business card management Systems tools
"""

Show Menu

Def Cards_dis ():
?? "" Show Menu "" "
?? Print (" " 20)
?? Print ("\ t Welcome" card management system V1.0 "\ n"
????? "\t\t\t1. New business card \ n "" \t\t\t2. Show all \ n "" \t\t\t3. Query business card \ n "" \t\t\t0. Exit System ")
?? Print (" " 20)
Cards_list = []

New Business Card

Def cards_add ():
?? "" "New Business Card" ""
?? Print ("-" * 20)
?? Print ("New business Card")
?? "" "input-organize into dictionaries-store dictionary in list-prompt for success" ""
?? NAME_STR = input ("Please enter Name:")
?? GENDER_STR = input ("Please enter Gender:")
?? Tel_int = input ("Please enter Phone:")
?? ADD_STR = input ("Please enter Address:")
?? Cards_dict = {"Name": Name_str,
????????????? "Gender": GENDER_STR,
????????????? "Telephone": Tel_int,
????????????? "Address": Add_str}
?? Cards_list.append (cards_dict)
?? Print (cards_list)
?? Print ("%s's business card added successfully! "% name_str)

Show All

Def cards_show_all ():
?? "" Show All Cards "" "
?? Print ("-" 20)
?? Print ("Show All Business Cards")
?? If Len (cards_list) = = 0:
????? Print ("There is no business card in the current system, please add a business card!" ")
?? Else
????? Print ("=" 40)
????? #print ("Name \t\t" "Gender \t\t" "Phone \t\t" "Address")
????? For name in ("Name", "Gender", "phone", "Address"):
???????? Print (name, end= "\t\t")
????? Print ("")
????? For cards_dict in Cards_list:
???????? Print ("%s\t\t%s\t\t%s\t\t%s"% (cards_dict["name"],
???????????????????????????????? cards_dict["Gender"],
???????????????????????????????? cards_dict["Telephone"],
???????????????????????????????? cards_dict["Address"]))
???????? Print (cards_dict)
????? Print ("=" * 40)

Query Business Cards

Def cards_requ ():
?? "" Query Business Card "" "
?? Print ("-" 20)
?? Print ("Query business Card")
?? Find_name = input ("Please enter name to search for:")
?? If Len (cards_list) = = 0:
????? Print ("Sorry! No information was found for user%s, please add! "% find_name)
?? Else
????? For Search_name in Cards_list:
???????? If search_name["name"] = = Find_name:
??????????? Print ("The information for%s was found. "% find_name)
??????????? Print ("=" 40)
??????????? For name in ("Name", "Gender", "phone", "Address"):
?????????????? Print (name, end= "\t\t")
??????????? Print ("")
??????????? Print ("s%\t\ts%\t\ts%\t\ts%"% (search_name["name"],
??????????????????????????????????? search_name["Gender"],
??????????????????????????????????? search_name["Telephone"],
??????????????????????????????????? search_name["Address"]))
??????????? Print ("=" * 40)
??????????? Cards_deal (Search_name)
??????????? Break
???????? Else
??????????? Print ("Sorry! No information was found for user%s. "% find_name)

Delete and modify business card information

def cards_deal (find_dict):
?? "" "Modify and delete business card" ""
?? Deal_cards = input ("Choose what you want to do: [1] Delete \t\t[2] Modify \t\t[3] Return to the main menu \ n")
?? If deal_cards in ["1", "2", "3"]:
????? if deal_cards = = "1":
???????? Cards_list.remove (find_dict)
???????? Print ("Delete user%s card successfully!") "% (find_dict[" name "]))
????? if deal_cards = = "2":
???????? find_dict["name"] = Cards_mod (find_dict["name"], "Please enter the modified name:")
???????? find_dict["gender"] = Cards_mod (find_dict["gender"], "Please enter the Modified gender:")
???????? find_dict["Telephone"] = Cards_mod (find_dict["Telephone"], "Please enter the modified phone:")
???????? find_dict["Address" = Cards_mod (find_dict["Address"], "Please enter the modified addresses:")
???????? Print ("User%s's business card modified successfully!") "% find_dict[" name "])
?? Else
???????? Print ("Input error, please re-enter!")
def cards_mod (Cards_value, cards_new):
?? result = input (cards_new)
?? If Len (Result) > 0:
????? return result
?? Else
????? Return Cards_value
I am also a novice, welcome the big boys to criticize correct.

Using Python to implement a simple business card management system