This method, if present, handles statements that get an attribute value of an instance, but there is no such entry in the instance's namespace. The calling sequence is:
def __getattr__(self, name): ...
The argument is the name of the desired attribute. The
method must either return the attribute's value or
Compare Section 26.3.15, “
__getattribute__(): Intercept all
attribute references”, which
is called even if the instance namespace does have an attribute with the desired