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raw_input that able to do detect multiple input

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  raw_input that able to do detect multiple input Frank <jiewei24@gmail.com> - 2013-04-06 18:03 -0700
    Re: raw_input that able to do detect multiple input Dave Angel <davea@davea.name> - 2013-04-06 21:41 -0400
      Re: raw_input that able to do detect multiple input Frank <jiewei24@gmail.com> - 2013-04-06 20:22 -0700
        Re: raw_input that able to do detect multiple input Dave Angel <davea@davea.name> - 2013-04-07 00:36 -0400
          Re: raw_input that able to do detect multiple input Frank <jiewei24@gmail.com> - 2013-04-06 22:00 -0700
            Re: raw_input that able to do detect multiple input Dave Angel <davea@davea.name> - 2013-04-07 01:25 -0400
          Re: raw_input that able to do detect multiple input Frank <jiewei24@gmail.com> - 2013-04-06 22:00 -0700
      Re: raw_input that able to do detect multiple input Frank <jiewei24@gmail.com> - 2013-04-06 20:22 -0700

#42959 — raw_input that able to do detect multiple input

Hi all, I would require advise on this question for function call interact:

the desire outcome:
interact()
Friends File: friends.csv
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...

my code so far for interact:
#interact function
def interact(*arg):
    open('friends.csv', 'rU')
    d = load_friends('friends.csv')
    print "Friends File: friends.csv"
    s = raw_input("Please input something: ")
    command = s.split(" ", 1)
    if "f" in command:
        display_friends("command",load_friends('friends.csv'))
        print command

#display friend function
def display_friends(name, friends_list):
Fname = name[0]
for item in friends_list:
    if item[0] == Fname:
        print item
        break
    else:
        print False

Let say if i type in " f John Cleese " and after the line 6 , my value of "command" should be ['f', 'John Cleese']. Is there ways to extract out John Cleese as a input so that i could use it on my function call "display_friends" ?

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#42963

On 04/06/2013 09:03 PM, Frank wrote:
> Hi all, I would require advise on this question for function call interact:
>
> the desire outcome:
> interact()
> Friends File: friends.csv
> 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...
>
> my code so far for interact:
> #interact function
> def interact(*arg):
>      open('friends.csv', 'rU')
>      d = load_friends('friends.csv')
>      print "Friends File: friends.csv"
>      s = raw_input("Please input something: ")
>      command = s.split(" ", 1)
>      if "f" in command:
>          display_friends("command",load_friends('friends.csv'))
>          print command
>
> #display friend function
> def display_friends(name, friends_list):
> Fname = name[0]
> for item in friends_list:
>      if item[0] == Fname:
>          print item
>          break
>      else:
>          print False
>
> Let say if i type in " f John Cleese " and after the line 6 , my value of "command" should be ['f', 'John Cleese']. Is there ways to extract out John Cleese as a input so that i could use it on my function call "display_friends" ?
>
>

Nothing about this message makes any sense to me. The function 
display_friends() has no body.  Code for load_friends() is missing.  You 
seem to be confusing variable names with literal strings. You open an 
input file "friends.csv", but never use the file handle.  You store the 
return value of load_friends() in d, but never use it.  The "desire 
outcome" includes lots of stuff that this code won't be producing.

And I cannot understand the question you ask at the end.  However, one 
thing I see that's wrong is the user is apparently typing a leading and 
trailinb blank on the line.  If you want to strip out whitespace before 
and after, just use strip().


-- 
DaveA

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#42972

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 



    

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#42975

On 04/06/2013 11:22 PM, Frank wrote:
> 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)

This is a mighty confusing way of skipping the first line.  You make it 
look like a loop, but it only executes once, since you have a return 
inside.  Besides, when you save the data, you don't put an extra header 
line at the top.  So it's not consistent.

>
> 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')

Now you've saved the data in a different file.  How does the next run of 
the program find it?

>
>
> I will elaborate my question further  , when the user type the function call interact()

What user?  In what environment can a user enter function calls into 
your code?

> 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

Why is the command invalid?

> Command: a Michael Palin
> Invalid Command: a Michael Palin
> Command: a John Cleese, Cheese Shop, 5552233, 5 May
> John Cleese is already a friend

That's not the way the message is worded in the code

> 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:

You don't really want "in" here.  You just want the first field to match 
"f"  So why not:
        if "f" == command[0]:

>          # invoke display_friends function

In this function and in save_friends, there is no return value, so not 
clear what you mean by  'result'

>          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
>
>

It's all over but the debugging.  What's the real question?


-- 
DaveA

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#42976

Now you've saved the data in a different file.  How does the next run of 
the program find it? 


What user?  In what environment can a user enter function calls into 
your code? 
-The user will call the function out from IDLE

Why is the command invalid? 
-Because the user need to type out a name after the "f"

That's not the way the message is worded in the code 
- because if user type in " a John Cleese, Cheese Shop, 5552233, 5 May"
it mean it would takes four arguments (comma separated) with information 
about a person and adds that person to my "friends.csv". An error message is printed if that person is already a friend. Because the name "John Cleese" is already in my friends.csv that why it will prompt out "John Cleese is already a friend"

In this function and in save_friends, there is no return value, so not 
clear what you mean by  'result' 

e ends the interaction and, if the friends information has been
updated, the information is saved to the friends.csv , i think i used the wrong function for this.

The question I'm told to work on:
interact() is the top-level function that denes the text-base user interface
as described in the introduction.

Here is an example of what is expected from your program. The input is
everything after Command: on a line (and the initial friends.csv). Every-
thing else is output. Your output should be exactly the same as below for
the given input.

interact() 
Friends File: friends.csv 
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...

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#42979

(You forgot to separate the parts of my comments that you were quoting 
from your responses.  Any decent email program will do that for you 
automatically, inserting "< " in front of each quoted line.  Then you 
just hit enter a couple of times to type the new stuff right after the 
part you're quoting.)


On 04/07/2013 01:00 AM, Frank wrote:
> Now you've saved the data in a different file.  How does the next run of
> the program find it?
>
>
> What user?  In what environment can a user enter function calls into
> your code?
> -The user will call the function out from IDLE

So the user is the programmer.  No end-user would be using IDLE to run a 
program.

>
> Why is the command invalid?
> -Because the user need to type out a name after the "f"

But that wouldn't be an invalid command, but invalid data

>
> That's not the way the message is worded in the code
> - because if user type in " a John Cleese, Cheese Shop, 5552233, 5 May"
> it mean it would takes four arguments (comma separated) with information
> about a person and adds that person to my "friends.csv". An error message is printed if that person is already a friend. Because the name "John Cleese" is already in my friends.csv that why it will prompt out "John Cleese is already a friend"

So fix the code, I just pointed out that the message was different.  The 
code says  print "%s is already in the list" % name

Yet you say the message needs to be:
 > John Cleese is already a friend

One or the other is incorrect.

>
> In this function and in save_friends, there is no return value, so not
> clear what you mean by  'result'
>
> e ends the interaction and, if the friends information has been
> updated, the information is saved to the friends.csv , i think i used the wrong function for this.

No, just the wrong filename.  I assumed you were going to rename it 
afterwards, tut apparently not.

>
> The question I'm told to work on:
> interact() is the top-level function that denes the text-base user interface
> as described in the introduction.
>

So if you call interact() in your program at the top-level, then a 
non-programmer can run the program directly from the terminal window.

> Here is an example of what is expected from your program. The input is
> everything after Command: on a line (and the initial friends.csv). Every-
> thing else is output. Your output should be exactly the same as below for
> the given input.
>
> interact()
> Friends File: friends.csv
> 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...
>

You will also need to add an argument to the raw_input() to have it 
produce the output specified.


-- 
DaveA

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#42977

Now you've saved the data in a different file.  How does the next run of 
the program find it? 


What user?  In what environment can a user enter function calls into 
your code? 
-The user will call the function out from IDLE

Why is the command invalid? 
-Because the user need to type out a name after the "f"

That's not the way the message is worded in the code 
- because if user type in " a John Cleese, Cheese Shop, 5552233, 5 May"
it mean it would takes four arguments (comma separated) with information 
about a person and adds that person to my "friends.csv". An error message is printed if that person is already a friend. Because the name "John Cleese" is already in my friends.csv that why it will prompt out "John Cleese is already a friend"

In this function and in save_friends, there is no return value, so not 
clear what you mean by  'result' 

e ends the interaction and, if the friends information has been
updated, the information is saved to the friends.csv , i think i used the wrong function for this.

The question I'm told to work on:
interact() is the top-level function that denes the text-base user interface
as described in the introduction.

Here is an example of what is expected from your program. The input is
everything after Command: on a line (and the initial friends.csv). Every-
thing else is output. Your output should be exactly the same as below for
the given input.

interact() 
Friends File: friends.csv 
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...

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#42973

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 



    

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