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Newsgroups: comp.lang.python
Date: Sat, 6 Apr 2013 20:22:42 -0700 (PDT)
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Subject: Re: raw_input that able to do detect multiple input
From: Frank <jiewei24@gmail.com>
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Hi Dave,


Sorry for my unclear question.
I didn't use the  d = load_friends('friends.csv') now because I'm going use it for other function later on, I should have remove it first to avoid confusion.

This is the code for load_friends , add_info ,display_friends, save_friends function:

def load_friends(filename):
    f = open(filename, 'rU')
    for row in f:
        return list (row.strip() for row in f)

def add_info(new_info, new_list):
    # Persons name is the first item of the list
    name = new_info[0]
    # Check if we already have an item with that name
    for item in new_list:
        if item[0] == name:
            print "%s is already in the list" % name
            return False
    # Insert the item into the list
    new_list.append(new_info)
    return True

def display_friends(name, friends_list):
    Fname = name[0]
    for item in friends_list:
        if item[0] == Fname:
            print item
            break
        else:
            print False

def save_friends(friend_info, new_list):
    with open(friend_info, 'w') as f:
        for line in new_list:
            f.write(line + '\n')


I will elaborate my question further  , when the user type the function call interact() this will appear :

interact() 
Friends File: friends.csv 

so after which the user would type in the command call maybe we call it " F John Cleese", the program need to know if the user input contain a "f" "a" or "e" at the first char and 

if 'f' it mean it would takes a name as an argument, prints out the information about that friend or prints an error message if the given name is notthe name of a friend in the database(friends.csv).

if "a" it would takes four arguments (comma separated) with information
about a person and adds that person as a friend. An error message is printed
if that person is already a friend.

if "e" it would ends the interaction and, if the friends information has been
updated, the information is saved to the friends.csv.

This is the example output 

Command: f John Cleese 
John Cleese: Ministry of Silly Walks, 5555421, 27 October 
Command: f Michael Palin 
Unknown friend Michael Palin 
Command: f 
Invalid Command: f 
Command: a Michael Palin 
Invalid Command: a Michael Palin 
Command: a John Cleese, Cheese Shop, 5552233, 5 May 
John Cleese is already a friend 
Command: a Michael Palin, Cheese Shop, 5552233, 5 May 
Command: f Michael Palin 
Michael Palin: Cheese Shop, 5552233, 5 May 
Command: e 
Saving changes... 
Exiting... 

So currently I think i had my other functions ready but I do not know how do i apply it into interact() 

my rough idea is :

def interact(*arg): 
    open('friends.csv', 'rU') 
    d = load_friends('friends.csv') 
    print "Friends File: friends.csv" 
    s = raw_input() 
    command = s.split(" ", 1) 
    if "f" in command: 
        # invoke display_friends function 
        print result
    elif "a" in command:
        # invoke add_info function
        print result
    elif "e" in command:
        # invoke save_friends function
        print result

My idea is to split the user command out to ['f', 'John Cleese'] and use the 'F' to invoke my "f" in the if statement and then i would use the display_friends function to process 'John Cleese' but i'm not sure if i'm able to do it this way