new style class

[gert]

class Test(object):

def execute(self,v):
return v

def escape(v):
return v

if __name__ == '__main__':
gert = Test()
print gert.m1('1')
print Test.m2('2')

Why doesn't this new style class work in python 2.5.1 ?

 

[Boris Borcic]

class Test(object):

def execute(self,v):
return v

def escape(v):
return v

if __name__ == '__main__':
gert = Test()
print gert.m1('1')
print Test.m2('2')

Why doesn't this new style class work in python 2.5.1 ?

why should it ?

 

[gert]

why should it ?

I don't know I thought it was supported from 2.2?

 

[gert]

I don't know I thought it was supported from 2.2?

oops the code is like this but doesn't work

class Test(object):

def m1(self,v):
return v

def m2(v):
return v

if __name__ == '__main__':
gert = Test()
print gert.m1('1')
print Test.m2('2')

 

[Wildemar Wildenburger]

I don't know I thought it was supported from 2.2?

Look at the error you get.

Repeat: LOOK AT THE ERROR YOU GET!

(Hint: "m1" not in ("execute", "escape"))

Nothing to do with old- or new-style classes.
/W

 

[Tim Chase]

I don't know I thought it was supported from 2.2?

I don't recall Python supporting non-existent method-calls (such
as m1/m2 when they aren't actually defined) in ANY version of Python.

But once you change that, you'll likely also want to investigate
the classmethod decorator if you want to create class-methods.

-tkc

 

[Nigel Rantor]

I don't know I thought it was supported from 2.2?

I think what Boris was being exceedingly unhelpful in saying was "why
should it work when you're calling methods that do not exist"

I don't see 'm1' or 'm2' defined for the class 'Test'.

n

 

[Martin Sand Christensen]

gert> Why doesn't this new style class work in python 2.5.1 ?

Whether you declare your class as a new style class or an old style
class, your code is completely and utterly broken. Calling non-existing
methods has never been a good way of getting things done.

Martin

 

[Wildemar Wildenburger]

oops the code is like this but doesn't work

class Test(object):

def m1(self,v):
return v

def m2(v):
return v

if __name__ == '__main__':
gert = Test()
print gert.m1('1')
print Test.m2('2')

Well, what do you think:

In [9]: gert = Test()

In [10]: print gert.m1('1')
....: print Test.m2('2')
....:
1
---------------------------------------------------------------------------
<type 'exceptions.TypeError'> Traceback (most recent call last)

/home/wildemar/<ipython console> in <module>()

<type 'exceptions.TypeError'>: unbound method m2() must be called with Test instance as first argument (got str instance instead)

(Another hint: look at what m1 has that m2 lacks.)

/W

 

[Boris Borcic]

gert wrote:
[...]

oops the code is like this but doesn't work

class Test(object):

def m1(self,v):
return v

def m2(v):
return v

if __name__ == '__main__':
gert = Test()
print gert.m1('1')
print Test.m2('2')

You should put a '@staticmethod' decorator before your m2 method definition

 

[gert]

Could not one of you just say "@staticmethod" for once damnit

 

[Bjoern Schliessmann]

Could not one of you just say "@staticmethod" for once damnit

No, since everyone's crystal balls are in repair.

Regards,


Björn

 

[Bjoern Schliessmann]

oops the code is like this but doesn't work

For sake of the god of your choice, please always provide runnable
code as well as hints to

- what you think it should do
- what you want it to do
- what exact error message(s) you get

NOT just "it doesn't work".

Regards,


Björn

 

[Wildemar Wildenburger]

No, since everyone's crystal balls are in repair.

I don't even have crystal balls!

/W

 

[gert]

I don't even have crystal balls!

/W

lol

 

[Bjoern Schliessmann]

Bjoern Schliessmann wrote:

I don't even have crystal balls!

Not many are rich *and* impotent.

Regards,


Björn

 

[Boris Borcic]

Could not one of you just say "@staticmethod" for once damnit

I did, did I not ?

 

[Nigel Rantor]

Could not one of you just say "@staticmethod" for once damnit

why were you asking if you knew the answer?

yeesh

 

[gert]

I did, did I not ?

i am sorry, yes you did

 

[Aahz]

I think what Boris was being exceedingly unhelpful in saying was "why
should it work when you're calling methods that do not exist"

http://www.catb.org/~esr/faqs/smart-questions.html