How to find out which functions exist?

[mrstephengross]

Let's say I have a python file with a base class, and a few derived
classes:

class Base:
pass

class Derived1(Base):
pass

class Derived2(Base):
pass

Is there a way I can find out the classes that have been derived from
Base?

Thanks,
--Steve

 

[Marc 'BlackJack' Rintsch]

Let's say I have a python file with a base class, and a few derived
classes:

class Base:
pass

class Derived1(Base):
pass

class Derived2(Base):
pass

Is there a way I can find out the classes that have been derived from
Base?

Take a look at the `issubclass()` function.

Ciao,
Marc 'BlackJack' Rintsch

 

[mrstephengross]

Take a look at the `issubclass()` function.

Ok, I see how to use issubclass(). How can I get a list of classes
present in the file?

--Steve

 

[Marc 'BlackJack' Rintsch]

Ok, I see how to use issubclass(). How can I get a list of classes
present in the file?

import module
from inspect import getmembers, isclass

classes = getmembers(module, isclass)


Ciao,
Marc 'BlackJack' Rintsch

 

[Gabriel Genellina]

En Tue, 23 Oct 2007 18:10:04 -0300, mrstephengross

Let's say I have a python file with a base class, and a few derived
classes:

class Base:
pass

class Derived1(Base):
pass

class Derived2(Base):
pass

Is there a way I can find out the classes that have been derived from
Base?

If Base were a new-style class, you could use Base.__subclasses__()

 

[mrstephengross]

import module

from inspect import getmembers, isclass
classes = getmembers(module, isclass)

Ok, this makes sense. How can I do it inside the .py file I'm working
on? That is, consider this:

class A:
pass
class B:
pass
import inspect
print inspect.getmembers(<this file>, inspect.isclass) # how can I
express <this file> ?

Thanks again,
--Steve

 

[Diez B. Roggisch]

Ok, this makes sense. How can I do it inside the .py file I'm working
on? That is, consider this:

class A:
pass
class B:
pass
import inspect
print inspect.getmembers(<this file>, inspect.isclass) # how can I
express <this file> ?

Then you can use globals(), like this:

classes = [v for v in globals().values() if isclass(v)]

Diez

 

[Marc 'BlackJack' Rintsch]

Ok, this makes sense. How can I do it inside the .py file I'm working
on? That is, consider this:

class A:
pass
class B:
pass
import inspect
print inspect.getmembers(<this file>, inspect.isclass) # how can I
express <this file> ?

If you want the objects from the current module you can simply look at the
`globals()` dictionary.

from inspect import isclass
from itertools import ifilter

classes = set(ifilter(isclass, globals().itervalues()))

Ciao,
Marc 'BlackJack' Rintsch