text: import datetime
  
  from django.forms.utils import flatatt, pretty_name
  from django.forms.widgets import Textarea, TextInput
  from django.utils.functional import cached_property
  from django.utils.html import conditional_escape, format_html, html_safe
  from django.utils.safestring import mark_safe
  from django.utils.translation import gettext_lazy as _
  
  __all__ = ('BoundField',)
  
  
  @html_safe
  class BoundField:
      "A Field plus data"
      def __init__(self, form, field, name):
          self.form = form
          self.field = field
          self.name = name
          self.html_name = form.add_prefix(name)
          self.html_initial_name = form.add_initial_prefix(name)
          self.html_initial_id = form.add_initial_prefix(self.auto_id)
          if self.field.label is None:
              self.label = pretty_name(name)
          else:
              self.label = self.field.label
          self.help_text = field.help_text or ''
  
      def __str__(self):
          """Render this field as an HTML widget."""
          if self.field.show_hidden_initial:
              return self.as_widget() + self.as_hidden(only_initial=True)
          return self.as_widget()
  
      @cached_property
      def subwidgets(self):
          """
          Most widgets yield a single subwidget, but others like RadioSelect and
          CheckboxSelectMultiple produce one subwidget for each choice.
  
          This property is cached so that only one database query occurs when
          rendering ModelChoiceFields.
          """
          id_ = self.field.widget.attrs.get('id') or self.auto_id
          attrs = {'id': id_} if id_ else {}
          attrs = self.build_widget_attrs(attrs)
          return [
              BoundWidget(self.field.widget, widget, self.form.renderer)
              for widget in self.field.widget.subwidgets(self.html_name, self.value(), attrs=attrs)
          ]
  
      def __bool__(self):
          # BoundField evaluates to True even if it doesn't have subwidgets.
          return True
  
      def __iter__(self):
          return iter(self.subwidgets)
  
      def __len__(self):
          return len(self.subwidgets)
  
      def __getitem__(self, idx):
          # Prevent unnecessary reevaluation when accessing BoundField's attrs
          # from templates.
          if not isinstance(idx, (int, slice)):
              raise TypeError
          return self.subwidgets[idx]
  
      @property
      def errors(self):
          """
          Return an ErrorList (empty if there are no errors) for this field.
          """
          return self.form.errors.get(self.name, self.form.error_class())
  
      def as_widget(self, widget=None, attrs=None, only_initial=False):
          """
          Render the field by rendering the passed widget, adding any HTML
          attributes passed as attrs. If a widget isn't specified, use the
          field's default widget.
          """
          widget = widget or self.field.widget
          if self.field.localize:
              widget.is_localized = True
          attrs = attrs or {}
          attrs = self.build_widget_attrs(attrs, widget)
          if self.auto_id and 'id' not in widget.attrs:
              attrs.setdefault('id', self.html_initial_id if only_initial else self.auto_id)
          return widget.render(
              name=self.html_initial_name if only_initial else self.html_name,
              value=self.value(),
              attrs=attrs,
              #renderer=self.form.renderer,
          )
  
      def as_text(self, attrs=None, **kwargs):
          """
          Return a string of HTML for representing this as an <input type="text">.
          """
          return self.as_widget(TextInput(), attrs, **kwargs)
  
      def as_textarea(self, attrs=None, **kwargs):
          """Return a string of HTML for representing this as a <textarea>."""
          return self.as_widget(Textarea(), attrs, **kwargs)
  
      def as_hidden(self, attrs=None, **kwargs):
          """
          Return a string of HTML for representing this as an <input type="hidden">.
          """
          return self.as_widget(self.field.hidden_widget(), attrs, **kwargs)
  
      @property
      def data(self):
          """
          Return the data for this BoundField, or None if it wasn't given.
          """
          return self.field.widget.value_from_datadict(self.form.data, self.form.files, self.html_name)
  
      def value(self):
          """
          Return the value for this BoundField, using the initial value if
          the form is not bound or the data otherwise.
          """
          data = self.initial
          if self.form.is_bound:
              data = self.field.bound_data(self.data, data)
          return self.field.prepare_value(data)
  
      def label_tag(self, contents=None, attrs=None, label_suffix=None):
          """
          Wrap the given contents in a <label>, if the field has an ID attribute.
          contents should be mark_safe'd to avoid HTML escaping. If contents
          aren't given, use the field's HTML-escaped label.
  
          If attrs are given, use them as HTML attributes on the <label> tag.
  
          label_suffix overrides the form's label_suffix.
          """
          contents = contents or self.label
          if label_suffix is None:
              label_suffix = (self.field.label_suffix if self.field.label_suffix is not None
                              else self.form.label_suffix)
          # Only add the suffix if the label does not end in punctuation.
          # Translators: If found as last label character, these punctuation
          # characters will prevent the default label_suffix to be appended to the label
          if label_suffix and contents and contents[-1] not in _(':?.!'):
              contents = format_html('{}{}', contents, label_suffix)
          widget = self.field.widget
          id_ = widget.attrs.get('id') or self.auto_id
          if id_:
              id_for_label = widget.id_for_label(id_)
              if id_for_label:
                  attrs = {**(attrs or {}), 'for': id_for_label}
              if self.field.required and hasattr(self.form, 'required_css_class'):
                  attrs = attrs or {}
                  if 'class' in attrs:
                      attrs['class'] += ' ' + self.form.required_css_class
                  else:
                      attrs['class'] = self.form.required_css_class
              attrs = flatatt(attrs) if attrs else ''
              contents = format_html('<label{}>{}</label>', attrs, contents)
          else:
              contents = conditional_escape(contents)
          return mark_safe(contents)
  
      def css_classes(self, extra_classes=None):
          """
          Return a string of space-separated CSS classes for this field.
          """
          if hasattr(extra_classes, 'split'):
              extra_classes = extra_classes.split()
          extra_classes = set(extra_classes or [])
          if self.errors and hasattr(self.form, 'error_css_class'):
              extra_classes.add(self.form.error_css_class)
          if self.field.required and hasattr(self.form, 'required_css_class'):
              extra_classes.add(self.form.required_css_class)
          return ' '.join(extra_classes)
  
      @property
      def is_hidden(self):
          """Return True if this BoundField's widget is hidden."""
          return self.field.widget.is_hidden
  
      @property
      def auto_id(self):
          """
          Calculate and return the ID attribute for this BoundField, if the
          associated Form has specified auto_id. Return an empty string otherwise.
          """
          auto_id = self.form.auto_id  # Boolean or string
          if auto_id and '%s' in str(auto_id):
              return auto_id % self.html_name
          elif auto_id:
              return self.html_name
          return ''
  
      @property
      def id_for_label(self):
          """
          Wrapper around the field widget's `id_for_label` method.
          Useful, for example, for focusing on this field regardless of whether
          it has a single widget or a MultiWidget.
          """
          widget = self.field.widget
          id_ = widget.attrs.get('id') or self.auto_id
          return widget.id_for_label(id_)
  
      @cached_property
      def initial(self):
          data = self.form.get_initial_for_field(self.field, self.name)
          # If this is an auto-generated default date, nix the microseconds for
          # standardized handling. See #22502.
          if (isinstance(data, (datetime.datetime, datetime.time)) and
                  not self.field.widget.supports_microseconds):
              data = data.replace(microsecond=0)
          return data
  
      def build_widget_attrs(self, attrs, widget=None):
          widget = widget or self.field.widget
          attrs = dict(attrs)  # Copy attrs to avoid modifying the argument.
          if widget.use_required_attribute(self.initial) and self.field.required and self.form.use_required_attribute:
              attrs['required'] = True
          if self.field.disabled:
              attrs['disabled'] = True
          return attrs
  
  
  @html_safe
  class BoundWidget:
      """
      A container class used for iterating over widgets. This is useful for
      widgets that have choices. For example, the following can be used in a
      template:
  
      {% for radio in myform.beatles %}
        <label for="{{ radio.id_for_label }}">
          {{ radio.choice_label }}
          <span class="radio">{{ radio.tag }}</span>
        </label>
      {% endfor %}
      """
      def __init__(self, parent_widget, data, renderer):
          self.parent_widget = parent_widget
          self.data = data
          self.renderer = renderer
  
      def __str__(self):
          return self.tag(wrap_label=True)
  
      def tag(self, wrap_label=False):
          context = {'widget': {**self.data, 'wrap_label': wrap_label}}
          return self.parent_widget._render(self.template_name, context, self.renderer)
  
      @property
      def template_name(self):
          if 'template_name' in self.data:
              return self.data['template_name']
          return self.parent_widget.template_name
  
      @property
      def id_for_label(self):
          return 'id_%s_%s' % (self.data['name'], self.data['index'])
  
      @property
      def choice_label(self):
          return self.data['label']
  