Package gavo :: Package base :: Module metavalidation :: Class MetaExists

Class MetaExists

   object --+    
            |    
MetaAssertion --+
                |
               MetaExists

An assertion that a meta item is present for key in whatever form.

Instance Methods

check(self, metaCarrier)
returns None if the assertion is true, a user-displayable string of what failed otherwise.

source code

Inherited from MetaAssertion: __init__

Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__, __sizeof__, __str__, __subclasshook__

Properties
Inherited from `object`: `__class__`

Method Details

check(self, metaCarrier)

source code

returns None if the assertion is true, a user-displayable string of what failed otherwise.

This must be overridden in derived classes.

Parameters:

metaCarrier - an object mixing in MetaMixin.

Overrides: MetaAssertion.check

(inherited documentation)