Python Pocket Reference, 3rd Edition

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Python Pocket Reference

Augmented binary methods

__iadd__(self, other)

__isub__(self, other)

__imul__(self, other)

__idiv__(self, other)

__ifloordiv__(self, other)

__itruediv__(self, other)

__imod__(self, other)

__ipow__(self, other[, modulo])

__ilshift__(self, other)

__irshift__(self, other)

__iand__(self, other)

__ixor__(self, other)

__ior__(self, other)

These are augmented assignment (in-place) methods.

Respectively, they are called for the following assign-

ment statement formats:

+=, -=, *=, /=, //=, /=, %=, **=,

<<=, >>=, &=, ^=, and |=. These methods should attempt to

do the operation in-place (modifying

self) and return the

result (which can be

self). If a method is not defined,

then the augmented operation falls back on the normal

methods. To evaluate

X+=Y, where X is an instance of a

class that has an

__iadd__, x.__iadd__(y) is called. Oth-

erwise,

__add__ and __radd__ are considered.

For Numbers (Other Operations)

__neg__(self)

Invoked on -self.

__pos__(self)

Invoked on +self.

__abs__(self)

Invoked on abs(self).

__invert__(self)

Invoked on ~self.