Re: basic Class in Python
"bartc" wrote in message news:xl_4n.28001$ym4.5...@text.news.virginmedia.com... > Any particular reason why two, and not one (or three)? In some fonts it's > difficult to > tell how many as they run together. It follows the C convention for reserved identifers. -- http://mail.python.org/mailman/listinfo/python-list
Re: basic Class in Python
bartc wrote: "Wolfgang Rohdewald" wrote in message news:mailman.1056.1263771299.28905.python-l...@python.org... On Monday 18 January 2010, BarryJOgorman wrote: TypeError: object._new_() takes no parameters def _init_(self, name, job=None, pay=0): __init__ needs two underscores left and right Any particular reason why two, and not one (or three)? In some fonts it's difficult to tell how many as they run together. I believe it was borrowed from C, which has __FILE__ and __LINE__ (CPython is written in C). With hindsight, of course, single underscores would've been sufficient... -- http://mail.python.org/mailman/listinfo/python-list
Re: basic Class in Python
"Wolfgang Rohdewald" wrote in message news:mailman.1056.1263771299.28905.python-l...@python.org... On Monday 18 January 2010, BarryJOgorman wrote: TypeError: object._new_() takes no parameters def _init_(self, name, job=None, pay=0): __init__ needs two underscores left and right Any particular reason why two, and not one (or three)? In some fonts it's difficult to tell how many as they run together. -- Bartc -- http://mail.python.org/mailman/listinfo/python-list
Re: basic Class in Python
On Monday 18 January 2010, BarryJOgorman wrote: > TypeError: object._new_() takes no parameters > def _init_(self, name, job=None, pay=0): __init__ needs two underscores left and right -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: basic Class in Python
On Jan 17, 11:09 pm, John Bokma wrote: > BarryJOgorman writes: > > class Person: > > def _init_(self, name, job=None, pay=0): > > def __init__(self, name, job=None, pay=0): > > Note 2x _ before and after init. > > -- > John Bokma j3b > > Hacking & Hiking in Mexico - http://johnbokma.com/http://castleamber.com/- > Perl & Python Development Many thanks - onward and upward! -- http://mail.python.org/mailman/listinfo/python-list
Re: basic Class in Python
On Sun, Jan 17, 2010 at 15:05 -0800, BarryJOgorman wrote: [...] > class Person: > def _init_(self, name, job=None, pay=0): ^^ --> __init__(self, ... It's __init__() not _init_()! Have fun learning Python! -- .''`. Wolodja Wentland : :' : `. `'` 4096R/CAF14EFC `- 081C B7CD FF04 2BA9 94EA 36B2 8B7F 7D30 CAF1 4EFC signature.asc Description: Digital signature -- http://mail.python.org/mailman/listinfo/python-list
Re: basic Class in Python
BarryJOgorman wrote:
> Working through Lutz's 'Learning Python'
>
> Trying to run the following code (from file person.py - see below):
>
> The file is held in Python31.
>
> at the Python31 prompt am entering ''person.py'
>
> Getting the following error:
> Traceback (most recent call last)
> File "C:python31\person.py", line 9, in (module)
> bob=Person('Bob Smith', job='barman', pay =34000)
> TypeError: object._new_() takes no parameters
In the future, please cut and paste the traceback -- don't retype. You may
introduce errors that obscure the actual problem.
> #Add incremental self test code
>
> class Person:
> def _init_(self, name, job=None, pay=0):
__init__() like all "special" method needs two leading and two trailing
underscores, not one.
> self.name = name
> self.job = job
> self.pay = pay
>
> bob = Person('Bob Smith', job='barman', pay = 34000)
> sue = Person('Sue Jones', job='dev', pay=10)
> print(bob.name, bob.pay)
> print(sue.name, sue.pay)
Peter
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Re: basic Class in Python
BarryJOgorman writes: > class Person: > def _init_(self, name, job=None, pay=0): def __init__(self, name, job=None, pay=0): Note 2x _ before and after init. -- John Bokma j3b Hacking & Hiking in Mexico - http://johnbokma.com/ http://castleamber.com/ - Perl & Python Development -- http://mail.python.org/mailman/listinfo/python-list
basic Class in Python
Working through Lutz's 'Learning Python'
Trying to run the following code (from file person.py - see below):
The file is held in Python31.
at the Python31 prompt am entering ''person.py'
Getting the following error:
Traceback (most recent call last)
File "C:python31\person.py", line 9, in (module)
bob=Person('Bob Smith', job='barman', pay =34000)
TypeError: object._new_() takes no parameters
#Add incremental self test code
class Person:
def _init_(self, name, job=None, pay=0):
self.name = name
self.job = job
self.pay = pay
bob = Person('Bob Smith', job='barman', pay = 34000)
sue = Person('Sue Jones', job='dev', pay=10)
print(bob.name, bob.pay)
print(sue.name, sue.pay)
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