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Form generation library for Pyramid framework

Project description


Simple form example

Form contains three different subsystems, basic form attributes, fields and actions.

import pform
from pyramid.httpexceptions import HTTPFound

class EditForm(pform.Form):

     label = 'Edit form'

     fields = pform.Fieldset(
            'name', title='Name')

     def safe_handler(self):
         data, errors = self.extract()

         if errors:
 = data['name']

     def cancel_handler(self):
         return HTTPFound(location='.')

This form renders one field name and two actions safe and cancel (submit buttons). Now we can render this form:

from pyramid.view import view_config

@view_config(route_name='....', renderer='myview.jinja2')
def my_view(request):
    form = EditForm(some_context, request)
    return form()

also it is possible to use form class as view:

class EditForm(pform.Form):

    fields = ...

To do additional custom form initialization just override update method, also if update method returns dictionary this values bypasses to form template:

class EditForm(pform.Form):

    def update(self):
        # custom form initialization
        return {some_data: some_value}

To get form values use extract method, this method return data and errors. data is a form result, errors is a list of errors:

class EditForm(pform.Form):

    def save_handler(self):
        data, errors = self.extract()

        if errors:

        # save data


There are two ways for field and form customization:

  1. Global customization

pform library uses player:: library for customization. pform libriary defines layer category form for all templates.

  1. Field/form customization

Also it is possible to customize widget of input template for each field. You can pass tmpl_widget argument to to field constructor for widget customization and tmpl_input argument for input generation. Both arguments should be valid pyramid renderer path. Form accepts three different templates, tmpl_view, tmpl_actions and tmpl_widget. tmpl_view is form renderer, tmpl_actions if form buttons renderer, tmpl_widget is custom field widget renderer. If field does not use custom tmpl_widget then form automatically sets tmpl_widget for each of this fields.


There are several example. You can find them in the examples directory at github.


  • Python 2.6+ or Python 3.2+

  • virtualenv


pform is offered under the BSD license.


0.6.2 (01-16-2013)

  • Fixed composite and options templates for Chrome

0.6.1 (01-09-2012)

  • Allow return additional data from action handler

  • Pass different context to vocabulary factory (depends on factory argument name: request, content, context)

0.6 (01-07-2013)

  • Added OptionsField

  • BaseMultiChoiceField.missing value is [] by default

  • Copy field missing value during fieldset data extraction

  • Fixed form csrf support

  • Fixed ‘checked’ value for radio field

  • Do not use missing value if value is not validation

0.5 (12-21-2012)

  • Added flat attribute to field and fieldset, with flat fieldset and composite field uses primary data dictionary instead of sub dict

0.4.1 (12-20-2012)

  • Fixed FileField validation

0.4 (12-12-2012)

  • Added Composite field

  • Render str in form:error message

  • Removed display mode

  • SimpleTerm and SimpleVocabulary renamed to Term and Vocabulary

  • Removed from_items and from_value SimpleVocabulary methods, use Vocabulary constructor instead

  • Use form layer category for form and field templates

  • Button class now inherits from InputField

0.3 (11-27-2012)

  • Allow to add str as error in Form.validate method

  • Better button handling

  • Better tanslations for Invalid messages

  • Changed arguments order for Invalid class contrustor

  • Added sub errors support to Invalid class

  • Added extract parameter to Button class, if extract is set then action extract values from form, adds errors to message and pass data to handler

  • Added pform.button2 decorator, extract parameter is true

  • Added max_size and allowed_types parameters to FileField

  • Do not override widget’s custom tmpl_widget

0.2 (11-13-2012)

  • Fixed submit button template

  • Allow to return http response from form update or action handler

  • Added support for player.layout()

0.1 (11-07-2012)

  • Initial release

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