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from mpi4py import MPI
try:
from collections import OrderedDict
except ImportError:
OrderedDict = dict
__all__ = ['TypeMap', 'ArrayTypes', 'allclose']
TypeMap = OrderedDict([
('b', MPI.SIGNED_CHAR),
('h', MPI.SHORT),
('i', MPI.INT),
('l', MPI.LONG),
('q', MPI.LONG_LONG),
('f', MPI.FLOAT),
('d', MPI.DOUBLE),
])
import sys
if sys.version_info[:2] < (3,3):
del TypeMap['q']
if MPI.SIGNED_CHAR == MPI.DATATYPE_NULL:
del TypeMap['b']
ArrayTypes = []
try:
import array
except ImportError:
pass
else:
def product(seq):
res = 1
for s in seq:
res = res * s
return res
def mkshape(seq):
return tuple([int(s) for s in seq])
class Array(array.array):
TypeMap = TypeMap.copy()
def __new__(cls, arg, typecode, shape=None):
if isinstance(arg, (int, float)):
if shape is None:
shape = ()
elif isinstance(shape, int):
shape = (shape,)
else:
shape = mkshape(shape)
size = product(shape)
arg = [arg] * size
else:
size = len(arg)
if shape is None: shape = (size,)
else: shape = mkshape(shape)
assert size == product(shape)
ary = array.array.__new__(cls, typecode, arg)
ary.shape = shape
ary.size = size
try:
ary.mpidtype = Array.TypeMap[typecode]
except KeyError:
ary.mpidtype = MPI.DATATYPE_NULL
return ary
def flat(self):
return self
flat = property(flat)
def as_raw(self):
return self
def as_mpi(self):
return (self, self.mpidtype)
def as_mpi_c(self, count):
return (self, count, self.mpidtype)
def as_mpi_v(self, cnt, dsp):
return (self, (cnt, dsp), self.mpidtype)
ArrayTypes.append(Array)
__all__.append('Array')
try:
import numpy
except ImportError:
pass
else:
class NumPy(object):
TypeMap = TypeMap.copy()
def __init__(self, arg, typecode, shape=None):
if isinstance(arg, (int, float, complex)):
if shape is None: shape = ()
else:
if shape is None: shape = len(arg)
self.array = ary = numpy.zeros(shape, typecode)
if isinstance(arg, (int, float, complex)):
ary.fill(arg)
else:
ary[:] = arg
try:
self.mpidtype = NumPy.TypeMap[typecode]
except KeyError:
self.mpidtype = MPI.DATATYPE_NULL
def __len__(self): return len(self.array)
def __getitem__(self, i): return self.array[i]
def __setitem__(self, i, v): self.array[i] = v
def typecode(self): return self.array.dtype.char
typecode = property(typecode)
def itemsize(self): return self.array.itemsize
itemsize = property(itemsize)
def flat(self): return self.array.flat
flat = property(flat)
def as_raw(self):
return self.array
def as_mpi(self):
return (self.array, self.mpidtype)
def as_mpi_c(self, count):
return (self.array, count, self.mpidtype)
def as_mpi_v(self, cnt, dsp):
return (self.array, (cnt, dsp), self.mpidtype)
ArrayTypes.append(NumPy)
__all__.append('NumPy')
try:
from numpy import allclose
except ImportError:
def allclose(a, b, rtol=1.e-5, atol=1.e-8):
for x, y in zip(a, b):
if abs(x-y) > (atol + rtol * abs(y)):
return False
return True
|
