[Tutor] Stupid newbie question

Danny Yoo dyoo at hkn.eecs.berkeley.edu
Sat Sep 24 00:41:04 CEST 2005

On Fri, 23 Sep 2005, Valone, Toren W. wrote:

> I am trying to noodle thru classes with python and I built the following
> class.

Hi Toren,

Ah.  Check your indentation: it appears that the definition of getday() is
within the body of the class initializer __init__().

What ends up happening is that getday() is no longer a method definition,
but an inner function definition.  Python makes it very easy to define
functions within functions, and what you have in effect is a function
definition within the __init__() method definition, which is probably not
what you want.

Tip: if possible, always use four spaces for your indentation to make this
error easier to see.  Don't skimp on this.  *grin*

Also note that Python's class system does not make using 'self' optional,
so when you're initializing the attributes of an instance in __init__:

    def __init__(self):
        remailfile = open('U:\Bounce20.txt', 'r')
        resendfile = open('resend.txt', 'w')
        EmailReport = open('erprt.txt', 'w')

you need to tell Python not to treat these as local variables assignments.

    def __init__(self):
        self.remailfile = open('U:\Bounce20.txt', 'r')
        self.resendfile = open('resend.txt', 'w')
        self.EmailReport = open('erprt.txt', 'w')

As a side note: escape the backslashes in your literal strings: otherwise,
you'll run into issues.  I'm assuming you're coming from a Java or C++
background, but if you need this point elaborated, please ask, and we'll
go into more detail.

If you have more questions, please feel free to ask.  Good luck!

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