def extract(self, field, subscriber=0):
if not hasattr(self, 'paramDim0'):
self.refreshParams()
params = [
str(eval('self.paramDim%i.value' % i))
for i in range(len(field.dimensions))
]
for dim, arg in enumerate(params):
if arg.startswith('#'):
step = None
if arg == '#:':
start = 0
end = len(field.dimensions[dim].data)
elif arg[1] == ':':
start = 0
end = long(arg[2:]) + 1
elif arg[-1] == ':':
start = long(arg[1:-1])
end = len(field.dimensions[dim].data)
else:
ind = map(long, arg[1:].split(':'))
start = ind[0]
if len(ind) == 1:
end = ind[0] + 1
elif len(ind) >= 2:
end = ind[1] + 1
if len(ind) == 3:
step = ind[2]
if len(ind) > 3:
raise ValueError("Illegal slice with "
"more than two colons.")
params[dim] = slice(start, end, step)
else:
s = DataContainer.slice2ind(arg, field.dimensions[dim])
params[dim] = slice(
s.start, min(s.stop + 1, len(field.dimensions[dim].data)),
s.step)
result = copy.deepcopy(field[params])
result.seal()
return result
def extract(self, field, subscriber=0):
if not hasattr(self, 'paramDim0'):
self.refreshParams()
params = [str(eval('self.paramDim%i.value' %i))
for i in range(len(field.dimensions))]
for dim, arg in enumerate(params):
if arg.startswith('#'):
step = None
if arg == '#:':
start = 0
end = len(field.dimensions[dim].data)
elif arg[1] == ':':
start = 0
end = long(arg[2:]) + 1
elif arg[-1] == ':':
start = long(arg[1: -1])
end = len(field.dimensions[dim].data)
else:
ind = map(long, arg[1:].split(':'))
start = ind[0]
if len(ind) == 1:
end = ind[0] + 1
elif len(ind) >= 2:
end = ind[1] + 1
if len(ind) == 3:
step = ind[2]
if len(ind) > 3:
raise ValueError("Illegal slice with "
"more than two colons.")
params[dim] = slice(start, end, step)
else:
s = DataContainer.slice2ind(arg, field.dimensions[dim])
params[dim] = slice(s.start,
min(s.stop + 1,
len(field.dimensions[dim].data)),
s.step)
result = copy.deepcopy(field[params])
result.seal()
return result
