Class INPUT

  object --+        
           |        
XmlComponent --+    
               |    
             DIV --+
                   |
                  INPUT

Known Subclasses:

SELECT, TEXTAREA

INPUT Component

examples::

    >>> INPUT(_type='text', _name='name', value='Max').xml()
    '<input name="name" type="text" value="Max" />'

    >>> INPUT(_type='checkbox', _name='checkbox', value='on').xml()
    '<input checked="checked" name="checkbox" type="checkbox" value="on" />'

    >>> INPUT(_type='radio', _name='radio', _value='yes', value='yes').xml()
    '<input checked="checked" name="radio" type="radio" value="yes" />'

    >>> INPUT(_type='radio', _name='radio', _value='no', value='yes').xml()
    '<input name="radio" type="radio" value="no" />'

the input helper takes two special attributes value= and requires=.

:param value: used to pass the initial value for the input field.
    value differs from _value because it works for checkboxes, radio,
    textarea and select/option too.

    - for a checkbox value should be '' or 'on'.
    - for a radio or select/option value should be the _value
        of the checked/selected item.

:param requires: should be None, or a validator or a list of validators
    for the value of the field.