def gen():
buf1, buf2 = self._header_buffer(), self._header_buffer()
start = t0
step = stride * len(self.segy.offsets)
stop = t0 + (length * step)
for i in range(start, stop, step):
x = Field.trace(buf1, traceno=i, segy=self.segy)
buf2, buf1 = buf1, buf2
yield x
def __getitem__(self, traceno, buf=None):
if isinstance(traceno, tuple):
return self.__getitem__(traceno[0], traceno[1])
if isinstance(traceno, slice):
gen_buf = self._header_buffer(buf)
def gen():
for i in xrange(*traceno.indices(self.segy.tracecount)):
yield self.__getitem__(i, gen_buf)
return gen()
return Field.trace(buf, traceno=traceno, segy=self.segy)
def __getitem__(self, traceno, buf=None):
if isinstance(traceno, tuple):
return self.__getitem__(traceno[0], traceno[1])
buf = self._header_buffer(buf)
if isinstance(traceno, slice):
def gen():
buf1, buf2 = self._header_buffer(), self._header_buffer()
for i in range(*traceno.indices(self.segy.tracecount)):
x = self.__getitem__(i, buf1)
buf2, buf1 = buf1, buf2
yield x
return gen()
return Field.trace(buf, traceno=traceno, segy=self.segy)
def gen():
start = t0
stop = t0 + (length * stride)
for i in xrange(start, stop, stride):
yield Field.trace(buf, traceno=i, segy=self.segy)