class Corr(y, x) [source] Returns the correlation coefficient as a float, or None if there aren’t any matching rows.

PostgreSQL has a number of features which are not shared by the other databases Django supports. This optional module contains model fields and form fields for a number of PostgreSQL specific data types. Psycopg2 2.5 or higher is required, though we highly recommend using the latest release. Some fields require higher versions. Note Django is, and will continue to be, a database-agnostic web framework. We would encourage those writing reusable applications for the Django community to write dat

LogEntry.content_type The ContentType of the modified object.

class storage.fallback.FallbackStorage This class first uses CookieStorage, and falls back to using SessionStorage for the messages that could not fit in a single cookie. It also requires Django’s contrib.sessions application. This behavior avoids writing to the session whenever possible. It should provide the best performance in the general case. FallbackStorage is the default storage class. If it isn’t suitable to your needs, you can select another storage class by setting MESSAGE_STORAGE

class TabularInline [source]

template A class attribute, as a format string, that describes the SQL that is generated for this function. Defaults to '%(function)s(%(expressions)s)'. If you’re constructing SQL like strftime('%W', 'date') and need a literal % character in the query, quadruple it (%%%%) in the template attribute because the string is interpolated twice: once during the template interpolation in as_sql() and once in the SQL interpolation with the query parameters in the database cursor.

Page.start_index() [source] Returns the 1-based index of the first object on the page, relative to all of the objects in the paginator’s list. For example, when paginating a list of 5 objects with 2 objects per page, the second page’s start_index() would return 3.

password_validators_help_text_html(password_validators=None) Returns an HTML string with all help texts in an <ul>. This is helpful when adding password validation to forms, as you can pass the output directly to the help_text parameter of a form field.

code The error code used by ValidationError if validation fails. Defaults to "invalid".

int_to_base36(i) [source] Converts a positive integer to a base 36 string. On Python 2 i must be smaller than sys.maxint.