Misago/misago/apps/signin/forms.py

from django import forms
from django.utils.translation import ugettext_lazy as _
from misago.forms import Form

class SignInForm(Form):
    user_email = forms.EmailField(max_length=255, label=_("Your email"))
    user_password = forms.CharField(widget=forms.PasswordInput, max_length=255, label=_("Your password"))
    user_remember_me = forms.BooleanField(label=_("Stay Signed In"), help_text=_("Sign me In automatically next time"), required=False)

    layout = [
              (
               None,
               (
                ('user_email', {'attrs': {'placeholder': _("Enter your e-mail")}}),
                ('user_password', {'has_value': False, 'placeholder': _("Enter your password")}),
                )
               ),
              (
               None,
               ['user_remember_me'],
               ),
              ]

    def __init__(self, *args, **kwargs):
        show_remember_me = kwargs.pop('show_remember_me')

        super(SignInForm, self).__init__(*args, **kwargs)
        if not show_remember_me:
            del self.fields['user_remember_me']