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danielfolsom · #1 01-Oct-2006, 12:57

Ok, I'm trying to do a code just to get used to OOP, i'm kinda a newbie, but ... here's the code:

Python Code:

class Ipod:
    def _init_ (self, type, color, space):
        self.color = color
        self.space = space
        self.type = type

    def show(self):
        print self.color + correspond[self.space] + self.type

correspond = {'2GB': 500, '4GB': 1000, '8GB': 2000, '30GB': 7500, '80GB':20000}

def Ask():
    IpodNano = Ipod()
    IpodNano.color = raw_input ("Silver, Pink, Black, Green, Blue")
    IpodNano.space = raw_input ("2GB 4GB or 8GB")
    IpodNano.type = "Ipod Nano"
    IpodNano.show()

    IpodRegular = Ipod()
    IpodRegular.color = raw_input ("Black, White")
    IpodRegular.space = raw_input (" 30GB, 80GB ")
    IpodRegular.type = "Ipod Regular"
    IpodRegular.show()


question = input ("How many people?")
for i in range(question):
    Ask()

I know that the problem is where I say print correspond[self.space], but I DON'T know how to get it to work, any suggestions? :-D

crystalattice · #2 02-Oct-2006, 00:26

Could you repost again using the python code tags ([py][/py]) around your code? I can't tell how your indents are supposed to be, especially for the correspond dictionary.

Offhand, type is a Python keyword, so you might want to change the name for that variable.

admin · #3 02-Oct-2006, 03:47

Quote:

Originally Posted by crystalattice

...

Offhand, type is a Python keyword, ...

It is? I used this list, for the syntax highlighting here. It doesn't include "type".

crystalattice · #4 03-Oct-2006, 22:12

When I tried writing the above program in IDLE, the default Python editor (which isn't the one I normally use but I was lazy), type came up color coded. I've never used it as a variable name by itself, so I didn't think anything about it. I was simply going on what IDLE gave me.

I double-checked it in SPE and it didn't color code it. Could just be a fluke in the IDLE markup code. Sorry about the confusion.

So danielfolsom, the answer to your problem is in the error code the Python interpreter spits out when you run the code.

Quote:

Traceback (most recent call last):
File "Desktop/ipod.py", line 28, in ?
Ask()
File "Desktop/ipod.py", line 17, in Ask
IpodNano.show()
File "Desktop/ipod.py", line 8, in show
print self.color + correspond[self.space] + self.type
TypeError: cannot concatenate 'str' and 'int' objects

Your print line is trying to put a string value together with an integer value, which it can't do. Try casting your integer into a string first then print it.

Ene Uran · #5 09-Oct-2006, 10:32

In Python type is not a keyword but a builtin function. Don't use it as a variable name or the following will happen:

Python Code:

>> type = 3
>>> type(type)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: 'int' object is not callable
>>>

Same goes for int, list, str, float and so on!
This will give you a list of all builtins:

Python Code:

print '\n'.join(sorted(dir(__builtins__), key=str.lower))

crystalattice · #6 09-Oct-2006, 13:29

So that would explain the disparity between the IDEs; IDLE, being the default IDE created by Guido himself, will show you the reserved words. SPE and others probably won't show you these words.

Good to know.

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