def content_types(self, query=None):
return self._get(<EOL>self.environment_url('<STR_LIT>'),<EOL>query<EOL>)<EOL>
Fetches all Content Types from the Space.

        API Reference: https://www.contentful.com/developers/docs/references/content-delivery-api/#/reference/content-types/content-model/get-the-content-model-of-a-space

        :param query: (optional) Dict with API options.
        :return: List of :class:`ContentType <contentful.content_type.ContentType>` objects.
        :rtype: List of contentful.content_type.ContentType

        Usage:
            >>> content_types = client.content_types()
            [<ContentType[City] id='1t9IbcfdCk6m04uISSsaIK'>,
             <ContentType[Human] id='human'>,
             <ContentType[Dog] id='dog'>,
             <ContentType[Cat] id='cat'>]