# Settings > Namespaces are one honking great idea - let's do more of those! > > — [The Zen of Python][cite] Configuration for REST framework is all namespaced inside a single Django setting, named `REST_FRAMEWORK`. For example your project's `settings.py` file might include something like this: REST_FRAMEWORK = { 'DEFAULT_RENDERER_CLASSES': ( 'rest_framework.renderers.YAMLRenderer', ), 'DEFAULT_PARSER_CLASSES': ( 'rest_framework.parsers.YAMLParser', ) } ## Accessing settings If you need to access the values of REST framework's API settings in your project, you should use the `api_settings` object. For example. from rest_framework.settings import api_settings print api_settings.DEFAULT_AUTHENTICATION_CLASSES The `api_settings` object will check for any user-defined settings, and otherwise fallback to the default values. Any setting that uses string import paths to refer to a class will automatically import and return the referenced class, instead of the string literal. --- # API Reference ## API policy settings *The following settings control the basic API policies, and are applied to every `APIView` class based view, or `@api_view` function based view.* #### DEFAULT_RENDERER_CLASSES A list or tuple of renderer classes, that determines the default set of renderers that may be used when returning a `Response` object. Default: ( 'rest_framework.renderers.JSONRenderer', 'rest_framework.renderers.BrowsableAPIRenderer', ) #### DEFAULT_PARSER_CLASSES A list or tuple of parser classes, that determines the default set of parsers used when accessing the `request.DATA` property. Default: ( 'rest_framework.parsers.JSONParser', 'rest_framework.parsers.FormParser', 'rest_framework.parsers.MultiPartParser' ) #### DEFAULT_AUTHENTICATION_CLASSES A list or tuple of authentication classes, that determines the default set of authenticators used when accessing the `request.user` or `request.auth` properties. Default: ( 'rest_framework.authentication.SessionAuthentication', 'rest_framework.authentication.BasicAuthentication' ) #### DEFAULT_PERMISSION_CLASSES A list or tuple of permission classes, that determines the default set of permissions checked at the start of a view. Default: ( 'rest_framework.permissions.AllowAny', ) #### DEFAULT_THROTTLE_CLASSES A list or tuple of throttle classes, that determines the default set of throttles checked at the start of a view. Default: `()` #### DEFAULT_CONTENT_NEGOTIATION_CLASS A content negotiation class, that determines how a renderer is selected for the response, given an incoming request. Default: `'rest_framework.negotiation.DefaultContentNegotiation'` --- ## Generic view settings *The following settings control the behavior of the generic class based views.* #### DEFAULT_MODEL_SERIALIZER_CLASS A class that determines the default type of model serializer that should be used by a generic view if `model` is specified, but `serializer_class` is not provided. Default: `'rest_framework.serializers.ModelSerializer'` #### DEFAULT_PAGINATION_SERIALIZER_CLASS A class the determines the default serialization style for paginated responses. Default: `rest_framework.pagination.PaginationSerializer` #### DEFAULT_FILTER_BACKENDS A list of filter backend classes that should be used for generic filtering. If set to `None` then generic filtering is disabled. #### PAGINATE_BY The default page size to use for pagination. If set to `None`, pagination is disabled by default. Default: `None` #### PAGINATE_BY_PARAM The name of a query parameter, which can be used by the client to override the default page size to use for pagination. If set to `None`, clients may not override the default page size. Default: `None` --- ## Authentication settings *The following settings control the behavior of unauthenticated requests.* #### UNAUTHENTICATED_USER The class that should be used to initialize `request.user` for unauthenticated requests. Default: `django.contrib.auth.models.AnonymousUser` #### UNAUTHENTICATED_TOKEN The class that should be used to initialize `request.auth` for unauthenticated requests. Default: `None` --- ## Browser overrides *The following settings provide URL or form-based overrides of the default browser behavior.* #### FORM_METHOD_OVERRIDE The name of a form field that may be used to override the HTTP method of the form. If the value of this setting is `None` then form method overloading will be disabled. Default: `'_method'` #### FORM_CONTENT_OVERRIDE The name of a form field that may be used to override the content of the form payload. Must be used together with `FORM_CONTENTTYPE_OVERRIDE`. If either setting is `None` then form content overloading will be disabled. Default: `'_content'` #### FORM_CONTENTTYPE_OVERRIDE The name of a form field that may be used to override the content type of the form payload. Must be used together with `FORM_CONTENT_OVERRIDE`. If either setting is `None` then form content overloading will be disabled. Default: `'_content_type'` #### URL_ACCEPT_OVERRIDE The name of a URL parameter that may be used to override the HTTP `Accept` header. If the value of this setting is `None` then URL accept overloading will be disabled. Default: `'accept'` #### URL_FORMAT_OVERRIDE The name of a URL parameter that may be used to override the default `Accept` header based content negotiation. Default: `'format'` --- ## Date and time formatting *The following settings are used to control how date and time representations may be parsed and rendered.* #### DATETIME_FORMAT A format string that should be used by default for rendering the output of `DateTimeField` serializer fields. If `None`, then `DateTimeField` serializer fields will return python `datetime` objects, and the datetime encoding will be determined by the renderer. May be any of `None`, `'iso-8601'` or a python [strftime format][strftime] string. Default: `None` #### DATETIME_INPUT_FORMATS A list of format strings that should be used by default for parsing inputs to `DateTimeField` serializer fields. May be a list including the string `'iso-8601'` or python [strftime format][strftime] strings. Default: `['iso-8601']` #### DATE_FORMAT A format string that should be used by default for rendering the output of `DateField` serializer fields. If `None`, then `DateField` serializer fields will return python `date` objects, and the date encoding will be determined by the renderer. May be any of `None`, `'iso-8601'` or a python [strftime format][strftime] string. Default: `None` #### DATE_INPUT_FORMATS A list of format strings that should be used by default for parsing inputs to `DateField` serializer fields. May be a list including the string `'iso-8601'` or python [strftime format][strftime] strings. Default: `['iso-8601']` #### TIME_FORMAT A format string that should be used by default for rendering the output of `TimeField` serializer fields. If `None`, then `TimeField` serializer fields will return python `time` objects, and the time encoding will be determined by the renderer. May be any of `None`, `'iso-8601'` or a python [strftime format][strftime] string. Default: `None` #### TIME_INPUT_FORMATS A list of format strings that should be used by default for parsing inputs to `TimeField` serializer fields. May be a list including the string `'iso-8601'` or python [strftime format][strftime] strings. Default: `['iso-8601']` --- ## Miscellaneous settings #### FORMAT_SUFFIX_KWARG The name of a parameter in the URL conf that may be used to provide a format suffix. Default: `'format'` [cite]: http://www.python.org/dev/peps/pep-0020/ [strftime]: http://docs.python.org/2/library/time.html#time.strftime d='n153' href='#n153'>153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224