[py3] Ported django.utils.encoding.

* Renamed smart_unicode to smart_text (but kept the old name under
  Python 2 for backwards compatibility).
* Renamed smart_str to smart_bytes.
* Re-introduced smart_str as an alias for smart_text under Python 3
  and smart_bytes under Python 2 (which is backwards compatible).
  Thus smart_str always returns a str objects.
* Used the new smart_str in a few places where both Python 2 and 3
  want a str.

5 files changed, 52 insertions, 52 deletions

diff --git a/django/forms/fields.py b/django/forms/fields.py
index cdb1d7be67..7f0d26d1aa 100644
--- a/django/forms/fields.py
+++ b/django/forms/fields.py
@@ -23,7 +23,7 @@ from django.forms.widgets import (TextInput, PasswordInput, HiddenInput,
     NullBooleanSelect, SelectMultiple, DateInput, DateTimeInput, TimeInput,
     SplitDateTimeWidget, SplitHiddenDateTimeWidget, FILE_INPUT_CONTRADICTION)
 from django.utils import formats
-from django.utils.encoding import smart_unicode, force_unicode
+from django.utils.encoding import smart_text, force_text
 from django.utils.ipv6 import clean_ipv6_address
 from django.utils import six
 from django.utils.translation import ugettext_lazy as _
@@ -78,13 +78,13 @@ class Field(object):
         # validators -- List of addtional validators to use
         # localize -- Boolean that specifies if the field should be localized.
         if label is not None:
-            label = smart_unicode(label)
+            label = smart_text(label)
         self.required, self.label, self.initial = required, label, initial
         self.show_hidden_initial = show_hidden_initial
         if help_text is None:
             self.help_text = ''
         else:
-            self.help_text = smart_unicode(help_text)
+            self.help_text = smart_text(help_text)
         widget = widget or self.widget
         if isinstance(widget, type):
             widget = widget()
@@ -195,7 +195,7 @@ class CharField(Field):
         "Returns a Unicode object."
         if value in validators.EMPTY_VALUES:
             return ''
-        return smart_unicode(value)
+        return smart_text(value)
 
     def widget_attrs(self, widget):
         attrs = super(CharField, self).widget_attrs(widget)
@@ -288,7 +288,7 @@ class DecimalField(Field):
             return None
         if self.localize:
             value = formats.sanitize_separators(value)
-        value = smart_unicode(value).strip()
+        value = smart_text(value).strip()
         try:
             value = Decimal(value)
         except DecimalException:
@@ -333,7 +333,7 @@ class BaseTemporalField(Field):
 
     def to_python(self, value):
         # Try to coerce the value to unicode.
-        unicode_value = force_unicode(value, strings_only=True)
+        unicode_value = force_text(value, strings_only=True)
         if isinstance(unicode_value, six.text_type):
             value = unicode_value.strip()
         # If unicode, try to strptime against each input format.
@@ -692,7 +692,7 @@ class ChoiceField(Field):
         "Returns a Unicode object."
         if value in validators.EMPTY_VALUES:
             return ''
-        return smart_unicode(value)
+        return smart_text(value)
 
     def validate(self, value):
         """
@@ -708,10 +708,10 @@ class ChoiceField(Field):
             if isinstance(v, (list, tuple)):
                 # This is an optgroup, so look inside the group for options
                 for k2, v2 in v:
-                    if value == smart_unicode(k2):
+                    if value == smart_text(k2):
                         return True
             else:
-                if value == smart_unicode(k):
+                if value == smart_text(k):
                     return True
         return False
 
@@ -752,7 +752,7 @@ class MultipleChoiceField(ChoiceField):
             return []
         elif not isinstance(value, (list, tuple)):
             raise ValidationError(self.error_messages['invalid_list'])
-        return [smart_unicode(val) for val in value]
+        return [smart_text(val) for val in value]
 
     def validate(self, value):
         """
diff --git a/django/forms/forms.py b/django/forms/forms.py
index 0f3fdb2e40..45b758202a 100644
--- a/django/forms/forms.py
+++ b/django/forms/forms.py
@@ -12,7 +12,7 @@ from django.forms.util import flatatt, ErrorDict, ErrorList
 from django.forms.widgets import Media, media_property, TextInput, Textarea
 from django.utils.datastructures import SortedDict
 from django.utils.html import conditional_escape, format_html
-from django.utils.encoding import StrAndUnicode, smart_unicode, force_unicode
+from django.utils.encoding import StrAndUnicode, smart_text, force_text
 from django.utils.safestring import mark_safe
 from django.utils import six
 
@@ -150,7 +150,7 @@ class BaseForm(StrAndUnicode):
             bf_errors = self.error_class([conditional_escape(error) for error in bf.errors]) # Escape and cache in local variable.
             if bf.is_hidden:
                 if bf_errors:
-                    top_errors.extend(['(Hidden field %s) %s' % (name, force_unicode(e)) for e in bf_errors])
+                    top_errors.extend(['(Hidden field %s) %s' % (name, force_text(e)) for e in bf_errors])
                 hidden_fields.append(six.text_type(bf))
             else:
                 # Create a 'class="..."' atribute if the row should have any
@@ -160,10 +160,10 @@ class BaseForm(StrAndUnicode):
                     html_class_attr = ' class="%s"' % css_classes
 
                 if errors_on_separate_row and bf_errors:
-                    output.append(error_row % force_unicode(bf_errors))
+                    output.append(error_row % force_text(bf_errors))
 
                 if bf.label:
-                    label = conditional_escape(force_unicode(bf.label))
+                    label = conditional_escape(force_text(bf.label))
                     # Only add the suffix if the label does not end in
                     # punctuation.
                     if self.label_suffix:
@@ -174,20 +174,20 @@ class BaseForm(StrAndUnicode):
                     label = ''
 
                 if field.help_text:
-                    help_text = help_text_html % force_unicode(field.help_text)
+                    help_text = help_text_html % force_text(field.help_text)
                 else:
                     help_text = ''
 
                 output.append(normal_row % {
-                    'errors': force_unicode(bf_errors),
-                    'label': force_unicode(label),
+                    'errors': force_text(bf_errors),
+                    'label': force_text(label),
                     'field': six.text_type(bf),
                     'help_text': help_text,
                     'html_class_attr': html_class_attr
                 })
 
         if top_errors:
-            output.insert(0, error_row % force_unicode(top_errors))
+            output.insert(0, error_row % force_text(top_errors))
 
         if hidden_fields: # Insert any hidden fields in the last row.
             str_hidden = ''.join(hidden_fields)
@@ -535,8 +535,8 @@ class BoundField(StrAndUnicode):
         associated Form has specified auto_id. Returns an empty string otherwise.
         """
         auto_id = self.form.auto_id
-        if auto_id and '%s' in smart_unicode(auto_id):
-            return smart_unicode(auto_id) % self.html_name
+        if auto_id and '%s' in smart_text(auto_id):
+            return smart_text(auto_id) % self.html_name
         elif auto_id:
             return self.html_name
         return ''
diff --git a/django/forms/models.py b/django/forms/models.py
index a2b5448b14..80d2a6536f 100644
--- a/django/forms/models.py
+++ b/django/forms/models.py
@@ -13,7 +13,7 @@ from django.forms.formsets import BaseFormSet, formset_factory
 from django.forms.util import ErrorList
 from django.forms.widgets import (SelectMultiple, HiddenInput,
     MultipleHiddenInput, media_property)
-from django.utils.encoding import smart_unicode, force_unicode
+from django.utils.encoding import smart_text, force_text
 from django.utils.datastructures import SortedDict
 from django.utils import six
 from django.utils.text import get_text_list, capfirst
@@ -875,7 +875,7 @@ class InlineForeignKeyField(Field):
             orig = getattr(self.parent_instance, self.to_field)
         else:
             orig = self.parent_instance.pk
-        if force_unicode(value) != force_unicode(orig):
+        if force_text(value) != force_text(orig):
             raise ValidationError(self.error_messages['invalid_choice'])
         return self.parent_instance
 
@@ -953,7 +953,7 @@ class ModelChoiceField(ChoiceField):
         generate the labels for the choices presented by this object. Subclasses
         can override this method to customize the display of the choices.
         """
-        return smart_unicode(obj)
+        return smart_text(obj)
 
     def _get_choices(self):
         # If self._choices is set, then somebody must have manually set
@@ -1025,9 +1025,9 @@ class ModelMultipleChoiceField(ModelChoiceField):
             except ValueError:
                 raise ValidationError(self.error_messages['invalid_pk_value'] % pk)
         qs = self.queryset.filter(**{'%s__in' % key: value})
-        pks = set([force_unicode(getattr(o, key)) for o in qs])
+        pks = set([force_text(getattr(o, key)) for o in qs])
         for val in value:
-            if force_unicode(val) not in pks:
+            if force_text(val) not in pks:
                 raise ValidationError(self.error_messages['invalid_choice'] % val)
         # Since this overrides the inherited ModelChoiceField.clean
         # we run custom validators here
diff --git a/django/forms/util.py b/django/forms/util.py
index 8cf03d38af..cd6b52df6f 100644
--- a/django/forms/util.py
+++ b/django/forms/util.py
@@ -2,7 +2,7 @@ from __future__ import unicode_literals
 
 from django.conf import settings
 from django.utils.html import format_html, format_html_join
-from django.utils.encoding import StrAndUnicode, force_unicode
+from django.utils.encoding import StrAndUnicode, force_text
 from django.utils.safestring import mark_safe
 from django.utils import timezone
 from django.utils.translation import ugettext_lazy as _
@@ -35,12 +35,12 @@ class ErrorDict(dict, StrAndUnicode):
         if not self: return ''
         return format_html('<ul class="errorlist">{0}</ul>',
                            format_html_join('', '<li>{0}{1}</li>',
-                                            ((k, force_unicode(v))
+                                            ((k, force_text(v))
                                              for k, v in self.items())
                            ))
 
     def as_text(self):
-        return '\n'.join(['* %s\n%s' % (k, '\n'.join(['  * %s' % force_unicode(i) for i in v])) for k, v in self.items()])
+        return '\n'.join(['* %s\n%s' % (k, '\n'.join(['  * %s' % force_text(i) for i in v])) for k, v in self.items()])
 
 class ErrorList(list, StrAndUnicode):
     """
@@ -53,16 +53,16 @@ class ErrorList(list, StrAndUnicode):
         if not self: return ''
         return format_html('<ul class="errorlist">{0}</ul>',
                            format_html_join('', '<li>{0}</li>',
-                                            ((force_unicode(e),) for e in self)
+                                            ((force_text(e),) for e in self)
                                             )
                            )
 
     def as_text(self):
         if not self: return ''
-        return '\n'.join(['* %s' % force_unicode(e) for e in self])
+        return '\n'.join(['* %s' % force_text(e) for e in self])
 
     def __repr__(self):
-        return repr([force_unicode(e) for e in self])
+        return repr([force_text(e) for e in self])
 
 # Utilities for time zone support in DateTimeField et al.
 
diff --git a/django/forms/widgets.py b/django/forms/widgets.py
index 13b7d8e7f6..be9ac8eb8f 100644
--- a/django/forms/widgets.py
+++ b/django/forms/widgets.py
@@ -17,7 +17,7 @@ from django.forms.util import flatatt, to_current_timezone
 from django.utils.datastructures import MultiValueDict, MergeDict
 from django.utils.html import conditional_escape, format_html, format_html_join
 from django.utils.translation import ugettext, ugettext_lazy
-from django.utils.encoding import StrAndUnicode, force_unicode
+from django.utils.encoding import StrAndUnicode, force_text
 from django.utils.safestring import mark_safe
 from django.utils import six
 from django.utils import datetime_safe, formats
@@ -223,7 +223,7 @@ class Widget(six.with_metaclass(MediaDefiningClass)):
             initial_value = ''
         else:
             initial_value = initial
-        if force_unicode(initial_value) != force_unicode(data_value):
+        if force_text(initial_value) != force_text(data_value):
             return True
         return False
 
@@ -257,7 +257,7 @@ class Input(Widget):
         final_attrs = self.build_attrs(attrs, type=self.input_type, name=name)
         if value != '':
             # Only add the 'value' attribute if a value is non-empty.
-            final_attrs['value'] = force_unicode(self._format_value(value))
+            final_attrs['value'] = force_text(self._format_value(value))
         return format_html('<input{0} />', flatatt(final_attrs))
 
 class TextInput(Input):
@@ -294,7 +294,7 @@ class MultipleHiddenInput(HiddenInput):
         id_ = final_attrs.get('id', None)
         inputs = []
         for i, v in enumerate(value):
-            input_attrs = dict(value=force_unicode(v), **final_attrs)
+            input_attrs = dict(value=force_text(v), **final_attrs)
             if id_:
                 # An ID attribute was given. Add a numeric index as a suffix
                 # so that the inputs don't all have the same ID attribute.
@@ -361,7 +361,7 @@ class ClearableFileInput(FileInput):
             template = self.template_with_initial
             substitutions['initial'] = format_html('<a href="{0}">{1}</a>',
                                                    value.url,
-                                                   force_unicode(value))
+                                                   force_text(value))
             if not self.is_required:
                 checkbox_name = self.clear_checkbox_name(name)
                 checkbox_id = self.clear_checkbox_id(checkbox_name)
@@ -398,7 +398,7 @@ class Textarea(Widget):
         final_attrs = self.build_attrs(attrs, name=name)
         return format_html('<textarea{0}>{1}</textarea>',
                            flatatt(final_attrs),
-                           force_unicode(value))
+                           force_text(value))
 
 class DateInput(Input):
     input_type = 'text'
@@ -515,7 +515,7 @@ class CheckboxInput(Widget):
             final_attrs['checked'] = 'checked'
         if not (value is True or value is False or value is None or value == ''):
             # Only add the 'value' attribute if a value is non-empty.
-            final_attrs['value'] = force_unicode(value)
+            final_attrs['value'] = force_text(value)
         return format_html('<input{0} />', flatatt(final_attrs))
 
     def value_from_datadict(self, data, files, name):
@@ -556,7 +556,7 @@ class Select(Widget):
         return mark_safe('\n'.join(output))
 
     def render_option(self, selected_choices, option_value, option_label):
-        option_value = force_unicode(option_value)
+        option_value = force_text(option_value)
         if option_value in selected_choices:
             selected_html = mark_safe(' selected="selected"')
             if not self.allow_multiple_selected:
@@ -567,15 +567,15 @@ class Select(Widget):
         return format_html('<option value="{0}"{1}>{2}</option>',
                            option_value,
                            selected_html,
-                           force_unicode(option_label))
+                           force_text(option_label))
 
     def render_options(self, choices, selected_choices):
         # Normalize to strings.
-        selected_choices = set(force_unicode(v) for v in selected_choices)
+        selected_choices = set(force_text(v) for v in selected_choices)
         output = []
         for option_value, option_label in chain(self.choices, choices):
             if isinstance(option_label, (list, tuple)):
-                output.append(format_html('<optgroup label="{0}">', force_unicode(option_value)))
+                output.append(format_html('<optgroup label="{0}">', force_text(option_value)))
                 for option in option_label:
                     output.append(self.render_option(selected_choices, *option))
                 output.append('</optgroup>')
@@ -643,8 +643,8 @@ class SelectMultiple(Select):
             data = []
         if len(initial) != len(data):
             return True
-        initial_set = set([force_unicode(value) for value in initial])
-        data_set = set([force_unicode(value) for value in data])
+        initial_set = set([force_text(value) for value in initial])
+        data_set = set([force_text(value) for value in data])
         return data_set != initial_set
 
 class RadioInput(SubWidget):
@@ -656,8 +656,8 @@ class RadioInput(SubWidget):
     def __init__(self, name, value, attrs, choice, index):
         self.name, self.value = name, value
         self.attrs = attrs
-        self.choice_value = force_unicode(choice[0])
-        self.choice_label = force_unicode(choice[1])
+        self.choice_value = force_text(choice[0])
+        self.choice_label = force_text(choice[1])
         self.index = index
 
     def __unicode__(self):
@@ -671,7 +671,7 @@ class RadioInput(SubWidget):
             label_for = format_html(' for="{0}_{1}"', self.attrs['id'], self.index)
         else:
             label_for = ''
-        choice_label = force_unicode(self.choice_label)
+        choice_label = force_text(self.choice_label)
         return format_html('<label{0}>{1} {2}</label>', label_for, self.tag(), choice_label)
 
     def is_checked(self):
@@ -709,7 +709,7 @@ class RadioFieldRenderer(StrAndUnicode):
         """Outputs a <ul> for this set of radio fields."""
         return format_html('<ul>\n{0}\n</ul>',
                            format_html_join('\n', '<li>{0}</li>',
-                                            [(force_unicode(w),) for w in self]
+                                            [(force_text(w),) for w in self]
                                             ))
 
 class RadioSelect(Select):
@@ -729,7 +729,7 @@ class RadioSelect(Select):
     def get_renderer(self, name, value, attrs=None, choices=()):
         """Returns an instance of the renderer."""
         if value is None: value = ''
-        str_value = force_unicode(value) # Normalize to string.
+        str_value = force_text(value) # Normalize to string.
         final_attrs = self.build_attrs(attrs)
         choices = list(chain(self.choices, choices))
         return self.renderer(name, str_value, final_attrs, choices)
@@ -753,7 +753,7 @@ class CheckboxSelectMultiple(SelectMultiple):
         final_attrs = self.build_attrs(attrs, name=name)
         output = ['<ul>']
         # Normalize to strings
-        str_values = set([force_unicode(v) for v in value])
+        str_values = set([force_text(v) for v in value])
         for i, (option_value, option_label) in enumerate(chain(self.choices, choices)):
             # If an ID attribute was given, add a numeric index as a suffix,
             # so that the checkboxes don't all have the same ID attribute.
@@ -764,9 +764,9 @@ class CheckboxSelectMultiple(SelectMultiple):
                 label_for = ''
 
             cb = CheckboxInput(final_attrs, check_test=lambda value: value in str_values)
-            option_value = force_unicode(option_value)
+            option_value = force_text(option_value)
             rendered_cb = cb.render(name, option_value)
-            option_label = force_unicode(option_label)
+            option_label = force_text(option_label)
             output.append(format_html('<li><label{0}>{1} {2}</label></li>',
                                       label_for, rendered_cb, option_label))
         output.append('</ul>')