day_09py Simple name management system

#! /usr/bin/env/python 
#-*-coding:utf-8-*- 
''' 
The name management system 
does program iteration, from point to point. 
''' 
# 1. Printing function prompt 
print( "="*50) 
print(" Name Relationship System V1.0") 
print(" 1: Add a new name") 
print(" 2: Delete a name") 
print(" 3: Modify a name") 
print (" 4: Query a name") 
print(" 5: Exit the system") 
print("="*50) 

names = [] # Define an empty list to store the added names 
while True: 
    # 2. Get the user The choice of 
    num = int(input("Please enter the function serial number:")) 
    # 3. According to the user's choice, execute the corresponding function 
    if num==1: 
        new_name = input("Please enter the name:") 
        names.append( new_name) 
        print(names) 
    elif num==2:


        if rm_name in names: 
            names.remove(rm_name) 
            print("Successfully removed, remaining names: %s"%names) 
        else: 
            print("The name was not found") 
    elif num==3: 
        pass 
    elif num==4: 
        find_name = input("Please enter the name you want to query:") 
        if find_name in names: 
            print("Found the person you are looking for:%s"%find_name) 
        else: 
            print("Sorry, didn't find it") 
    elif num= =5: 
        print("Exit the program") 
        break 
    else: 
        print("Your input is incorrect, please re-enter")