Python-сообщество

/django_project/forms.py

class CountersField(forms.fields.IntegerField):
    def clean(self, value):
        re_s= re.compile("\d*", re.U)
        return super(CountersField, self).clean("".join(re.findall(re_s,value)))

/django_project/apps/app1/forms.py
from django_project.forms import CountersField
class SomeForm(forms.Form):
        
        f1 = forms.ModelChoiceField()
        
        f2 = forms.DateTimeField(initial = datetime.datetime(2008, 12,30))
        input = CountersField()
        output = CountersField()

#python manage.py shell
>>> from django import forms
>>> from  django_project.apps.app1.forms import SomeForm
>>> f= SomeForm()
>>> f.input
<django_project.forms.CountersField object at 0x120c110>
>>> isinstance(f.input, forms.Field)
False

$ ls -R
.:
foo

./foo:
bar.py  __init__.py

$ cat foo/bar.py

class Bar(object):
    pass

$ cd foo
$ python

>>> import sys
>>> 
>>> sys.path = [".."] + sys.path
>>> 
>>> from bar import Bar
>>> from foo.bar import Bar as Bar1
>>> 
>>> Bar == Bar1
False
>>>
>>> b = Bar()
>>> isinstance(b, Bar1)
False