class problem, NoneType obj has no attribute

[Larry Bates]

globalrev wrote:
> On 16 Maj, 14:19, Bruno Desthuilliers <bruno.
> 42.desthuilli... at websiteburo.invalid> wrote:
>> globalrev a écrit :
>>
>>> wassup here?
>>> 7
>>> Traceback (most recent call last):
>>>   File "C:\Python25\myPrograms\netflix\netflix.py", line 22, in
>>> <module>
>>>     print cust1.getID()
>>> AttributeError: 'NoneType' object has no attribute 'getID'
>>> class customer:
>> 1/ naming convention : class names should be CamelCased
>> 2/ unless you need compatibility with years old Python versions, use
>> newstyle classes
>>
>> class Customer(object):
>>
>>>     def __init__(self, ID, movies):
>>>         self.ID = ID
>>>         self.movies = movies
>> 3/ naming conventions : ALL_UPPER_NAMES denote (pseudo) constants
>>
>>      def __init__(self, id, movies):
>>          self.id = id
>>          self.movies = movies
>>
>>>     def getID():
>>>         return self.ID
>>>     def getMovies():
>>>         return self.movies
>> 4/ Python has support for computed attributes, so you just don't need
>> these getters.
>>
>>
>>
>>> import os
>>> import customer
>>> import movie
>>> mv1 = open('C:\\Python25\\myPrograms\\netflix\\mv1exp2.txt', 'r+')
>>> mv1str = mv1.read()
>>> print mv1str.count(',5,')
>>> cust1 = customer.__init__('12',['1','435','2332'])
>> __init__ is automagically called on instanciation, so you don't have to
>> call it yourself. And FWIW, your __init__ returns None.
>>
>> cust1 = Customer('12', ['1', '435', '2332'])
>>
>>> print cust1.getID()
>> print cust1.id
> 
> print "cust", cust1.idnbr, cust1.movies()
> 
> Traceback (most recent call last):
>   File "C:\Python25\myPrograms\netflix\netflix.py", line 24, in
> <module>
>     print "cust", cust1.idnbr, cust1.movies()
> TypeError: 'list' object is not callable
> 
> when class =
> class customer:
>     def __init__(self, idnbr, movies):
>         self.idnbr = idnbr
>         self.movies = movies
> 
> print "cust", cust1.idnbr, cust1.movies()
> 
> Traceback (most recent call last):
>   File "C:\Python25\myPrograms\netflix\netflix.py", line 24, in
> <module>
>     print "cust", cust1.idnbr, cust1.movies()
> TypeError: 'list' object is not callable
> 
> when class =
> class customer:
>     def __init__(self, idnbr, movies):
>         self.idnbr = idnbr
>         self.movies = movies
> 

You really should back up and go through the Python tutorial.

cust1.movies() tells Python to call the object pointed to by cust1.movies (note 
the parenthesis after .movies).  Since that object (in your case) is a list, 
that makes no sense (which is exactly what the traceback said).

print "cust", cust1.idnbr, cust1.movies

is what you want here.

-Larry