Dynamically update ModelForm's Meta class

from django.forms import ModelForm

from testprogram.online_bookings.models import Passenger

class PassengerInfoForm(ModelForm):

    def set_form_excludes(self, exclude_list):
        self.Meta.exclude = excludes_list

    class Meta:
        model = Passenger
        exclude = []

def get_form(exclude_list):
    class myform(ModelForm):
        class Meta:
            model = Passenger
            exclude = exclude_list
    return myform

frm_class = get_form( ('field1', 'field2') )
form = frm_class()

def PassengerForm(exclude_list, *args, **kwargs):
    class MyPassengerForm(ModelForm):
        class Meta:
            model = Passenger
            exclude = exclude_list

        def __init__(self):
            super(MyPassengerForm, self).__init__(*args, **kwargs)

    return MyPassengerForm()

form = PassengerForm( ('field1', 'field2') )

class PassengerInfoForm(ModelForm):
    def __init__(self, *args, **kwargs):
        exclude_list = kwargs['exclude_list']
        del kwargs['exclude_list']

        super(PassengerInfoForm, self).__init__(*args, **kwargs)

        for field in exclude_list:
            del self.fields[field]

    class Meta:
        model = Passenger

form = PassengerInfoForm(exclude_list=['field1', 'field2'])

from django.contrib.admin.widgets import AdminDateWidget
from django.forms import ModelForm
from django.db import models

def ModelFormFactory(some_model, *args, **kwargs):
"""
Create a ModelForm for some_model
"""
widdict = {}
# set some widgets for special fields
for field in some_model._meta.local_fields:
    if type(field) is models.DateField:
        widdict[field.name] = AdminDateWidget()

class MyModelForm(ModelForm): # I use my personal BaseModelForm as parent
    class Meta:
        model = some_model
        widgets = widdict

return MyModelForm(*args, **kwargs)