Package Scientific :: Package BSP :: Class ParAccumulator

Class ParAccumulator

object --+    
         |    
  ParValue --+
             |
            ParAccumulator

Global accumulator

ParAccumulator objects are used to perform iterative reduction operations in loops. The initial local value is zero (i.e. the passed-in zero object, not the number 0), which is modified by subsequent calls to the method addValue.

Instance Methods

__init__(self, operator, zero)
x.__init__(...) initializes x; see x.__class__.__doc__ for signature

addValue(self, value)
Replace the internal value of the accumulator by internal_value = operator(internal_value, value).

ParValue

calculateTotal(self)
Returns: a reduction over the local values on all processors

Inherited from ParValue: __add__, __call__, __div__, __divmod__, __eq__, __ge__, __getattr__, __getitem__, __gt__, __le__, __len__, __lt__, __mod__, __mul__, __ne__, __neg__, __nonzero__, __pow__, __repr__, __str__, __sub__, accumulate, alltrue, anytrue, broadcast, fullExchange, get, getattr, map, put, reduce

Inherited from object: __delattr__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __setattr__

Class Variables
Inherited from `ParValue`: `is_parvalue`

Properties
Inherited from `object`: `__class__`

Method Details

init(self, operator, zero)
(Constructor)

x.__init__(...) initializes x; see x.__class__.__doc__ for signature

Parameters:

operator (function of two variables) - a local function taking two arguments and returning one argument of the same type
zero - the initial value for reduction

Overrides: object.__init__

calculateTotal(self)

Returns: ParValue: a reduction over the local values on all processors

Class ParAccumulator

__init__(self, operator, zero) (Constructor)

calculateTotal(self)

init(self, operator, zero)
(Constructor)