I don't even know what it's called...

I'm completely new to python, I just started about 3 days ago. I've requested some books from my library on python, so I hope I'm headed in the right direction. I hate to ask this because I'm sure it's been asked before, but I don't know what it is called so I don't even know where to begin. Is it possible to edit the code of a python program, while executing it.

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if loop == 2:    

    def menu(list,question):

        for entry in list:

            print 1+list.index(entry),

            print ") " + entry
 
        return input (question) - 1
 
CEF = ['CURRENT OBJECTIVES','CURRENT TARGET','CURRENT MISSION','Exit']
 
name = raw_input("Please insert your name: ")

print "Hello", name,"Welcome to the Information Desk"

print ""

while loop == 2:

    choice = menu(CEF, "Please Select: ")

    if choice == 0:

        Print "There is no information"

    if choice == 1:

        print "There is no information"

    if choice == 2:

        print "There is no information"

    if choice == 3:

        print "Thank You",name

        sleep(2)

        loop = 4

I want to change the places where it says "there is no information" to whatever I want, without having to edit the code manually, instead I would like to enter the information with the program itself. Almost like changing the value of a variable, except, making it permanent, so it will be like that next time I run the program.

Again, sorry if this has already been asked, but What is this called and How do I do it?

jlm699

Needs Regular Fix

313 Posts

July 1st, 2008
05:12 PM
#2

Re: I don't even know what it's called...

Quote:

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	if loop == 2:    

    def menu(list,question):

        for entry in list:

            print 1+list.index(entry),

            print ") " + entry
 
        return input (question) - 1
 
CEF = ['CURRENT OBJECTIVES','CURRENT TARGET','CURRENT MISSION','Exit']
 
name = raw_input("Please insert your name: ")

print "Hello", name,"Welcome to the Information Desk"

print ""

while loop == 2:

    choice = menu(CEF, "Please Select: ")

    if choice == 0:

        Print "There is no information"

    if choice == 1:

        print "There is no information"

    if choice == 2:

        print "There is no information"

    if choice == 3:

        print "Thank You",name

        sleep(2)

        loop = 4

A possibility would be to initialize variables before your while loop. Let's say:
choice0 = choice1 = choice2 = choice3 = 'There is no information'
Then during the loop you simply put print choice0 or print choice1...

During the loop Then you could store some kind of input with:
usr_input = raw_input('Enter some text: ')

Then you could assign one of your choices to the same value like
choice0 = usr_input

This might be what you're looking for. There's not really any specific name for this, it's just dynamic variables.

Thomascountz

Newbie

6 Posts

July 4th, 2008
04:48 AM
#3

Re: I don't even know what it's called...

That's not exactly what I was wondering how to do. Let me rephrase:

Lets say I have a variable: a
in the code it would be written:
a = 0
When I run the code: print a
The output would be: 0
When running the program, I tell it: a = 1
in the code it would now be written:
a = 1

The actually code has changed.
How would I do this, if it is possible.

hope this makes sense.

jlm699

Needs Regular Fix

313 Posts

July 11th, 2008
12:04 PM
#8

Re: I don't even know what it's called...

Quote:

how do you scan for the variables?

You would have to write your own utility for parsing the file, but it would probably be something like this:

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f = open( my_prog.py, 'r' )
 
for line in f:

    data = line.split('=')

    if len( data ) == 2:

        var_name = data[0]

        try:        

            var_val = int( data[1] )

            # Now you can change the value to whatever you want

        except:

            # Either a non-integer value or a string

            pass

Simple file reading/writing and basic text parsing is all it is.