django.utils.encoding smart_text Example Code

smart_text is a callable within the django.utils.encoding module of the Django project.

Example 1 from AuditLog

Auditlog (project documentation) is a Django app that logs changes to Python objects, similar to the Django admin's logs but with more details and output formats. Auditlog's source code is provided as open source under the MIT license.

AuditLog / src / auditlog / models.py

# models.py
from __future__ import unicode_literals

import json
import ast

from django.conf import settings
from django.contrib.contenttypes.fields import GenericRelation
from django.contrib.contenttypes.models import ContentType
from django.core.exceptions import FieldDoesNotExist
from django.db import models, DEFAULT_DB_ALIAS
from django.db.models import QuerySet, Q
from django.utils import formats, timezone
from django.utils.encoding import python_2_unicode_compatible, smart_text
from django.utils.six import iteritems, integer_types
from django.utils.translation import ugettext_lazy as _

from jsonfield.fields import JSONField
from dateutil import parser
from dateutil.tz import gettz


class LogEntryManager(models.Manager):

    def log_create(self, instance, **kwargs):
        changes = kwargs.get('changes', None)
        pk = self._get_pk_value(instance)

        if changes is not None:
            kwargs.setdefault('content_type', ContentType.objects.get_for_model(instance))
            kwargs.setdefault('object_pk', pk)
            kwargs.setdefault('object_repr', smart_text(instance))

            if isinstance(pk, integer_types):
                kwargs.setdefault('object_id', pk)

            get_additional_data = getattr(instance, 'get_additional_data', None)
            if callable(get_additional_data):
                kwargs.setdefault('additional_data', get_additional_data())

            if kwargs.get('action', None) is LogEntry.Action.CREATE:
                if kwargs.get('object_id', None) is not None and self.filter(content_type=kwargs.get('content_type'), object_id=kwargs.get('object_id')).exists():
                    self.filter(content_type=kwargs.get('content_type'), object_id=kwargs.get('object_id')).delete()
                else:
                    self.filter(content_type=kwargs.get('content_type'), object_pk=kwargs.get('object_pk', '')).delete()
            db = instance._state.db
            return self.create(**kwargs) if db is None or db == '' else self.using(db).create(**kwargs)
        return None

    def get_for_object(self, instance):
        if not isinstance(instance, models.Model):
            return self.none()

        content_type = ContentType.objects.get_for_model(instance.__class__)
        pk = self._get_pk_value(instance)



## ... source file abbreviated to get to smart_text examples ...



    def __str__(self):
        if self.action == self.Action.CREATE:
            fstring = _("Created {repr:s}")
        elif self.action == self.Action.UPDATE:
            fstring = _("Updated {repr:s}")
        elif self.action == self.Action.DELETE:
            fstring = _("Deleted {repr:s}")
        else:
            fstring = _("Logged {repr:s}")

        return fstring.format(repr=self.object_repr)

    @property
    def changes_dict(self):
        try:
            return json.loads(self.changes)
        except ValueError:
            return {}

    @property
    def changes_str(self, colon=': ', arrow=smart_text(' \u2192 '), separator='; '):
        substrings = []

        for field, values in iteritems(self.changes_dict):
            substring = smart_text('{field_name:s}{colon:s}{old:s}{arrow:s}{new:s}').format(
                field_name=field,
                colon=colon,
                old=values[0],
                arrow=arrow,
                new=values[1],
            )
            substrings.append(substring)

        return separator.join(substrings)

    @property
    def changes_display_dict(self):
        from auditlog.registry import auditlog
        model = self.content_type.model_class()
        model_fields = auditlog.get_model_fields(model._meta.model)
        changes_display_dict = {}
        for field_name, values in iteritems(self.changes_dict):
            try:
                field = model._meta.get_field(field_name)
            except FieldDoesNotExist:
                changes_display_dict[field_name] = values
                continue
            values_display = []
            choices_dict = None
        if isinstance(pk, integer_types):
            return self.filter(content_type=content_type, object_id=pk)
        else:
            return self.filter(content_type=content_type, object_pk=smart_text(pk))

    def get_for_objects(self, queryset):
        if not isinstance(queryset, QuerySet) or queryset.count() == 0:
            return self.none()

        content_type = ContentType.objects.get_for_model(queryset.model)
        primary_keys = list(queryset.values_list(queryset.model._meta.pk.name, flat=True))

        if isinstance(primary_keys[0], integer_types):
            return self.filter(content_type=content_type).filter(Q(object_id__in=primary_keys)).distinct()
        elif isinstance(queryset.model._meta.pk, models.UUIDField):
            primary_keys = [smart_text(pk) for pk in primary_keys]
            return self.filter(content_type=content_type).filter(Q(object_pk__in=primary_keys)).distinct()
        else:
            return self.filter(content_type=content_type).filter(Q(object_pk__in=primary_keys)).distinct()

    def get_for_model(self, model):
        if not issubclass(model, models.Model):
            return self.none()

        content_type = ContentType.objects.get_for_model(model)

        return self.filter(content_type=content_type)



## ... source file abbreviated to get to smart_text examples ...


        get_latest_by = 'timestamp'
        ordering = ['-timestamp']
        verbose_name = _("log entry")
        verbose_name_plural = _("log entries")


## ... source file continues with no further smart_text examples...

Example 2 from django-cms

django-cms (project website) is a Python-based content management system (CMS) library for use with Django web apps that is open sourced under the BSD 3-Clause "New" license.

django-cms / cms / templatetags / cms_tags.py

# cms_tags.py
from collections import namedtuple, OrderedDict
from copy import copy
from datetime import datetime

from django import template
from django.conf import settings
from django.contrib.sites.models import Site
from django.core.mail import mail_managers
from django.db.models import Model
from django.middleware.common import BrokenLinkEmailsMiddleware
from django.template.loader import render_to_string
from django.urls import reverse
from django.utils.encoding import force_text, smart_text
from django.utils.html import escape
from django.utils.http import urlencode
from django.utils.translation import (
    get_language,
    override as force_language,
    ugettext_lazy as _,
)

from six import string_types, integer_types

from classytags.arguments import (Argument, MultiValueArgument,
                                  MultiKeywordArgument)
from classytags.core import Options, Tag
from classytags.helpers import InclusionTag, AsTag
from classytags.parser import Parser
from classytags.utils import flatten_context
from classytags.values import ListValue, StringValue

from cms.cache.page import get_page_url_cache, set_page_url_cache
from cms.exceptions import PlaceholderNotFound
from cms.models import Page, Placeholder as PlaceholderModel, CMSPlugin, StaticPlaceholder
from cms.plugin_pool import plugin_pool
from cms.toolbar.utils import get_toolbar_from_request
from cms.utils import get_current_site, get_language_from_request, get_site_id


## ... source file abbreviated to get to smart_text examples ...


    def render_tag(self, context, **kwargs):
        context.push()
        template = self.get_template(context, **kwargs)
        data = self.get_context(context, **kwargs)
        output = render_to_string(template, flatten_context(data)).strip()
        context.pop()
        if kwargs.get('varname'):
            context[kwargs['varname']] = output
            return ''
        else:
            return output

    def _get_editable_context(self, context, instance, language, edit_fields,
                              view_method, view_url, querystring, editmode=True):
        request = context['request']
        if hasattr(request, 'toolbar'):
            lang = request.toolbar.toolbar_language
        else:
            lang = get_language()
        opts = instance._meta
        if getattr(instance, '_deferred', False):
            opts = opts.proxy_for_model._meta
        with force_language(lang):
            extra_context = {}
            if edit_fields == 'changelist':
                instance.get_plugin_name = u"%s %s list" % (smart_text(_('Edit')), smart_text(opts.verbose_name))
                extra_context['attribute_name'] = 'changelist'
            elif editmode:
                instance.get_plugin_name = u"%s %s" % (smart_text(_('Edit')), smart_text(opts.verbose_name))
                if not context.get('attribute_name', None):
                    extra_context['attribute_name'] = '-'.join(edit_fields) \
                                                        if not isinstance('edit_fields', string_types) else edit_fields
            else:
                instance.get_plugin_name = u"%s %s" % (smart_text(_('Add')), smart_text(opts.verbose_name))
                extra_context['attribute_name'] = 'add'
            extra_context['instance'] = instance
            extra_context['generic'] = opts
            if view_method:
                method = getattr(instance, view_method)
                if callable(method):
                    url_base = method(context['request'])
                else:
                    url_base = method
            else:
                if not editmode:
                    view_url = 'admin:%s_%s_add' % (
                        opts.app_label, opts.model_name)
                    url_base = reverse(view_url)
                elif not edit_fields:
                    if not view_url:
                        view_url = 'admin:%s_%s_change' % (
                            opts.app_label, opts.model_name)
                    if isinstance(instance, Page):
                        url_base = reverse(view_url, args=(instance.pk, language))
                    else:
                        url_base = reverse(view_url, args=(instance.pk,))
                else:
                    if not view_url:


## ... source file continues with no further smart_text examples...

Example 3 from django-jet

django-jet (project documentation, PyPI project page and more information) is a fancy Django Admin panel replacement.

The django-jet project is open source under the GNU Affero General Public License v3.0.

django-jet / jet / utils.py

# utils.py
import datetime
import json
from django.template import Context
from django.utils import translation
from jet import settings
from jet.models import PinnedApplication

try:
    from django.apps.registry import apps
except ImportError:
    try:
        from django.apps import apps # Fix Django 1.7 import issue
    except ImportError:
        pass
from django.core.serializers.json import DjangoJSONEncoder
from django.http import HttpResponse
try:
    from django.core.urlresolvers import reverse, resolve, NoReverseMatch
except ImportError: # Django 1.11
    from django.urls import reverse, resolve, NoReverseMatch

from django.contrib.admin import AdminSite
from django.utils.encoding import smart_text
from django.utils.text import capfirst
from django.contrib import messages
from django.utils.encoding import force_text
from django.utils.functional import Promise
from django.contrib.admin.options import IncorrectLookupParameters
from django.contrib import admin
from django.utils.translation import ugettext_lazy as _
from django.utils.text import slugify

try:
    from collections import OrderedDict
except ImportError:
    from ordereddict import OrderedDict  # Python 2.6


class JsonResponse(HttpResponse):

    def __init__(self, data, encoder=DjangoJSONEncoder, safe=True, **kwargs):
        if safe and not isinstance(data, dict):
            raise TypeError('In order to allow non-dict objects to be '
                'serialized set the safe parameter to False')
        kwargs.setdefault('content_type', 'application/json')
        data = json.dumps(data, cls=encoder)
        super(JsonResponse, self).__init__(content=data, **kwargs)


## ... source file abbreviated to get to smart_text examples ...


        for func_closure in index_resolver.func.__closure__:
            if isinstance(func_closure.cell_contents, AdminSite):
                return func_closure.cell_contents
    except:
        pass

    return admin.site


def get_admin_site_name(context):
    return get_admin_site(context).name


class LazyDateTimeEncoder(json.JSONEncoder):
    def default(self, obj):
        if isinstance(obj, datetime.datetime) or isinstance(obj, datetime.date):
            return obj.isoformat()
        elif isinstance(obj, Promise):
            return force_text(obj)
        return self.encode(obj)


def get_model_instance_label(instance):
    if getattr(instance, "related_label", None):
        return instance.related_label()
    return smart_text(instance)


class SuccessMessageMixin(object):
    success_message = ''

    def form_valid(self, form):
        response = super(SuccessMessageMixin, self).form_valid(form)
        success_message = self.get_success_message(form.cleaned_data)
        if success_message:
            messages.success(self.request, success_message)
        return response

    def get_success_message(self, cleaned_data):
        return self.success_message % cleaned_data


def get_model_queryset(admin_site, model, request, preserved_filters=None):
    model_admin = admin_site._registry.get(model)

    if model_admin is None:
        return

    try:
        changelist_url = reverse('%s:%s_%s_changelist' % (


## ... source file continues with no further smart_text examples...

Example 4 from django-pipeline

django-pipeline (project documentation and PyPI package information) is a code library for handling and compressing static content assets when handling requests in Django web applications.

The django-pipeline project is open sourced under the MIT License and it is maintained by the developer community group Jazzband.

django-pipeline / pipeline / utils.py

# utils.py
try:
    import fcntl
except ImportError:
    fcntl = None

import importlib
import mimetypes
import posixpath
import os
import sys

from urllib.parse import quote

from django.utils.encoding import smart_text

from pipeline.conf import settings


def to_class(class_str):
    if not class_str:
        return None

    module_bits = class_str.split('.')
    module_path, class_name = '.'.join(module_bits[:-1]), module_bits[-1]
    module = importlib.import_module(module_path)
    return getattr(module, class_name, None)


def filepath_to_uri(path):
    if path is None:
        return path
    return quote(smart_text(path).replace("\\", "/"), safe="/-!*()'#?")


def guess_type(path, default=None):
    for type, ext in settings.MIMETYPES:
        mimetypes.add_type(type, ext)
    mimetype, _ = mimetypes.guess_type(path)
    if not mimetype:
        return default
    return smart_text(mimetype)


def relpath(path, start=posixpath.curdir):
    if not path:
        raise ValueError("no path specified")

    start_list = posixpath.abspath(start).split(posixpath.sep)
    path_list = posixpath.abspath(path).split(posixpath.sep)

    i = len(posixpath.commonprefix([start_list, path_list]))

    rel_list = [posixpath.pardir] * (len(start_list) - i) + path_list[i:]
    if not rel_list:
        return posixpath.curdir
    return posixpath.join(*rel_list)


def set_std_streams_blocking():
    if not fcntl:
        return
    for f in (sys.__stdout__, sys.__stderr__):
        fileno = f.fileno()
        flags = fcntl.fcntl(fileno, fcntl.F_GETFL)
        fcntl.fcntl(fileno, fcntl.F_SETFL, flags & -os.O_NONBLOCK)


## ... source file continues with no further smart_text examples...

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