Re: [Tutor] class newbie

2017-07-23 Thread Michael C 
thanks!

On Sun, Jul 23, 2017 at 5:35 PM, Danny Yoo  wrote:

> On Sun, Jul 23, 2017 at 1:24 PM, Michael C
>  wrote:
> > class mahschool:
> > def print():
> > print('Say something')
>
>
> By the way, you've chosen a name for your method that's spelled the
> same as the name of the built-in "print" function.  I'd recommend you
> choose a different name than "print" in your method name, just to
> avoid any potential confusion.  This isn't going to solve the
> immediate problem that you encountered and solved: you figured out
> that methods need to have a self argument.  But you probably still
> want to rename to avoid the name collision.
>
>
> Good luck!
>
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Re: [Tutor] class newbie

2017-07-23 Thread Mats Wichmann 
On 07/23/2017 02:42 PM, Michael C wrote:
> never mind, I forgot to put 'self' in the method definition!

class mahschool:
def print(self):
print('Say something')


a = mahschool()

a.print()

Indeed.  The error message was clear on this - but not in a way that's
always instructive until you're used to it :)

"TypeError: print() takes 0 positional arguments but 1 was given"

A method is called "silently" (you didn't pass it yourself as an
argument when you called print()) with the instance, so you need to
declare such a parameter in the method definition.

And to give myself an excuse for preaching: it's usually not a great
idea to reuse the name of a built-in function.
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Re: [Tutor] class newbie

2017-07-23 Thread Danny Yoo 
On Sun, Jul 23, 2017 at 1:24 PM, Michael C
 wrote:
> class mahschool:
> def print():
> print('Say something')


By the way, you've chosen a name for your method that's spelled the
same as the name of the built-in "print" function.  I'd recommend you
choose a different name than "print" in your method name, just to
avoid any potential confusion.  This isn't going to solve the
immediate problem that you encountered and solved: you figured out
that methods need to have a self argument.  But you probably still
want to rename to avoid the name collision.


Good luck!
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Re: [Tutor] class newbie

2017-07-23 Thread Michael C 
never mind, I forgot to put 'self' in the method definition!

class mahschool:
def print(self):
print('Say something')


a = mahschool()

a.print()


On Sun, Jul 23, 2017 at 1:24 PM, Michael C 
wrote:

> class mahschool:
> def print():
> print('Say something')
>
>
> a = mahschool()
>
> a.print()
>
>
>
> With this, I get this error:
>
> Traceback (most recent call last):
>   File "test.py", line 8, in 
> a.print()
> TypeError: print() takes 0 positional arguments but 1 was given
>
>
> What did I do wrong?
>
> Thanks!
>
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