old_contents: #change in forms to use floppyforms widgets
  import floppyforms as forms
  from django.utils.translation import ugettext as _
  
  
  class SearchForm(forms.Form):
      search = forms.CharField(label=_('Nome'), widget=forms.TextInput(attrs={'class': 'input-medium'}), max_length=200, required=False)
  
new_contents: #change in forms to use floppyforms widgets
  import floppyforms as forms
  from django.utils.translation import ugettext as _
  
  
  class SearchForm(forms.Form):
      search = forms.CharField(label=_('Nome'), widget=forms.TextInput(attrs={'class': 'form-control'}), max_length=200, required=False)
  
subject: Update forms.py