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Parser for HTML forms, that fills in defaults and errors. See
``render``.
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Render the ``form`` (which should be a string) given the defaults
and errors. Defaults are the values that go in the input fields
(overwriting any values that are there) and errors are displayed
inline in the form (and also effect input classes). Returns the
rendered string.
If ``auto_insert_errors`` is true (the default) then any errors
for which ```` tags can't be found will be put just
above the associated input field, or at the top of the form if no
field can be found.
If ``use_all_keys`` is true, if there are any extra fields from
defaults or errors that couldn't be used in the form it will be an
error.
``error_formatters`` is a dictionary of formatter names to
one-argument functions that format an error into HTML. Some
default formatters are provided if you don't provide this.
``error_class`` is the class added to input fields when there is
an error for that field.
``add_attributes`` is a dictionary of field names to a dictionary
of attribute name/values. If the name starts with ``+`` then the
value will be appended to any existing attribute (e.g.,
``{'+class': ' important'}``).
``auto_error_formatter`` is used to create the HTML that goes
above the fields. By default it wraps the error message in a span
and adds a `` ``.
If ``text_as_default`` is true (default false) then ```` will be treated as text inputs.
``listener`` can be an object that watches fields pass; the only
one currently is in ``htmlfill_schemabuilder.SchemaBuilder``
``encoding`` specifies an encoding to assume when mixing str and
unicode text in the template.
``prefix_error`` specifies if the HTML created by auto_error_formatter is
put before the input control (default) or after the control.
``force_defaults`` specifies if a field default is not given in
the ``defaults`` dictionary then the control associated with the
field should be set as an unsuccessful control. So checkboxes will
be cleared, radio and select controls will have no value selected,
and textareas will be emptied. This defaults to ``True``, which is
appropriate the defaults are the result of a form submission.
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Formatter that escapes the error, wraps the error in a span with
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Formatter that escapes HTML, no more.
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Formatter that escapes HTML, and translates newlines to `` ``
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Formatter that emits nothing, regardless of the error.
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Fills HTML with default values, as in a form.
Examples::
>>> defaults = {'name': 'Bob Jones',
... 'occupation': 'Crazy Cultist',
... 'address': '14 W. Canal\nNew Guinea',
... 'living': 'no',
... 'nice_guy': 0}
>>> parser = FillingParser(defaults)
>>> parser.feed('\
... \
... \
... ')
>>> parser.close()
>>> print parser.text() # doctest: +NORMALIZE_WHITESPACE
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Compare the two objects as strings (coercing to strings if necessary).
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