Parallel Iterator built using Python’s multiprocessing module¶
- sage.parallel.multiprocessing_sage.parallel_iter(processes, f, inputs)[source]¶
- Return a parallel iterator. - INPUT: - processes– integer
- f– function
- inputs– an iterable of pairs (args, kwds)
 - OUTPUT: iterator over values of - fat- args, kwdsin some random order- EXAMPLES: - sage: def f(x): return x+x sage: import sage.parallel.multiprocessing_sage sage: v = list(sage.parallel.multiprocessing_sage.parallel_iter(2, f, [((2,), {}), ((3,),{})])) sage: v.sort(); v [(((2,), {}), 4), (((3,), {}), 6)] - >>> from sage.all import * >>> def f(x): return x+x >>> import sage.parallel.multiprocessing_sage >>> v = list(sage.parallel.multiprocessing_sage.parallel_iter(Integer(2), f, [((Integer(2),), {}), ((Integer(3),),{})])) >>> v.sort(); v [(((2,), {}), 4), (((3,), {}), 6)] 
- sage.parallel.multiprocessing_sage.pyprocessing(processes=0)[source]¶
- Return a parallel iterator using a given number of processes implemented using pyprocessing. - INPUT: - processes– integer (default: 0); if 0, set to the number of processors on the computer
 - OUTPUT: a (partially evaluated) function - EXAMPLES: - sage: from sage.parallel.multiprocessing_sage import pyprocessing sage: p_iter = pyprocessing(4) sage: P = parallel(p_iter=p_iter) sage: def f(x): return x+x sage: v = list(P(f)(list(range(10)))); v.sort(); v [(((0,), {}), 0), (((1,), {}), 2), (((2,), {}), 4), (((3,), {}), 6), (((4,), {}), 8), (((5,), {}), 10), (((6,), {}), 12), (((7,), {}), 14), (((8,), {}), 16), (((9,), {}), 18)] - >>> from sage.all import * >>> from sage.parallel.multiprocessing_sage import pyprocessing >>> p_iter = pyprocessing(Integer(4)) >>> P = parallel(p_iter=p_iter) >>> def f(x): return x+x >>> v = list(P(f)(list(range(Integer(10))))); v.sort(); v [(((0,), {}), 0), (((1,), {}), 2), (((2,), {}), 4), (((3,), {}), 6), (((4,), {}), 8), (((5,), {}), 10), (((6,), {}), 12), (((7,), {}), 14), (((8,), {}), 16), (((9,), {}), 18)]