Metaclasses

A metaclass is class whose instances are classes.

Like an „ordinary“ class defines the behaviour of the instances of the class, a metaclass defines the behaviour of classes and their instances.

Some programmers see metaclasses in Python as „solutions waiting or looking for a problem“.

There are numerous use cases for metaclasses. Just to name a few:

• Logging und profiling
• Schnittstellenüberwachung
• Registrierung von Klassen bei ihrer Erzeugung
• Automatisches Hinzufügen von Methoden
• Proxies -
• Locking
• usw.