def test_read_and_write_traceheader(self, mmap=False):
with TestContext("read_and_write_trace_header") as context:
context.copy_file(self.filename)
f = _segyio.open("small.sgy", "r+")
if mmap: _segyio.mmap(f)
binary_header = _segyio.read_binaryheader(f)
ilb = 189
xlb = 193
metrics = _segyio.init_metrics(f, binary_header)
empty = _segyio.empty_traceheader()
with self.assertRaises(TypeError):
trace_header = _segyio.read_traceheader("+", )
with self.assertRaises(TypeError):
trace_header = _segyio.read_traceheader(f, 0, None)
trace_header = _segyio.read_traceheader(
f, 0, _segyio.empty_traceheader(), metrics['trace0'],
metrics['trace_bsize'])
self.assertEqual(_segyio.get_field(trace_header, ilb), 1)
self.assertEqual(_segyio.get_field(trace_header, xlb), 20)
trace_header = _segyio.read_traceheader(
f, 1, _segyio.empty_traceheader(), metrics['trace0'],
metrics['trace_bsize'])
self.assertEqual(_segyio.get_field(trace_header, ilb), 1)
self.assertEqual(_segyio.get_field(trace_header, xlb), 21)
_segyio.set_field(trace_header, ilb, 99)
_segyio.set_field(trace_header, xlb, 42)
_segyio.write_traceheader(f, 0, trace_header, metrics['trace0'],
metrics['trace_bsize'])
trace_header = _segyio.read_traceheader(
f, 0, _segyio.empty_traceheader(), metrics['trace0'],
metrics['trace_bsize'])
self.assertEqual(_segyio.get_field(trace_header, ilb), 99)
self.assertEqual(_segyio.get_field(trace_header, xlb), 42)
_segyio.close(f)
def test_read_and_write_traceheader(self):
fname = self.filename.replace("small", "bin_hdr_wrt")
shutil.copyfile(self.filename, fname)
f = _segyio.open(fname, "r+")
binary_header = _segyio.read_binaryheader(f)
ilb = 189
xlb = 193
metrics = _segyio.init_metrics(f, binary_header, ilb, xlb)
empty = _segyio.empty_traceheader()
with self.assertRaises(TypeError):
trace_header = _segyio.read_traceheader("+", )
with self.assertRaises(TypeError):
trace_header = _segyio.read_traceheader(f, 0, None)
trace_header = _segyio.read_traceheader(f, 0,
_segyio.empty_traceheader(),
metrics['trace0'],
metrics['trace_bsize'])
self.assertEqual(_segyio.get_field(trace_header, ilb), 1)
self.assertEqual(_segyio.get_field(trace_header, xlb), 20)
trace_header = _segyio.read_traceheader(f, 1,
_segyio.empty_traceheader(),
metrics['trace0'],
metrics['trace_bsize'])
self.assertEqual(_segyio.get_field(trace_header, ilb), 1)
self.assertEqual(_segyio.get_field(trace_header, xlb), 21)
_segyio.set_field(trace_header, ilb, 99)
_segyio.set_field(trace_header, xlb, 42)
_segyio.write_traceheader(f, 0, trace_header, metrics['trace0'],
metrics['trace_bsize'])
trace_header = _segyio.read_traceheader(f, 0,
_segyio.empty_traceheader(),
metrics['trace0'],
metrics['trace_bsize'])
self.assertEqual(_segyio.get_field(trace_header, ilb), 99)
self.assertEqual(_segyio.get_field(trace_header, xlb), 42)
_segyio.close(f)
def test_get_and_set_field(self):
hdr = _segyio.empty_traceheader()
with self.assertRaises(TypeError):
_segyio.get_field(".", 0)
with self.assertRaises(TypeError):
_segyio.set_field(".", 0, 1)
with self.assertRaises(IndexError):
_segyio.get_field(hdr, 0)
with self.assertRaises(IndexError):
_segyio.set_field(hdr, 0, 1)
_segyio.set_field(hdr, 1, 127)
_segyio.set_field(hdr, 5, 67)
_segyio.set_field(hdr, 9, 19)
self.assertEqual(_segyio.get_field(hdr, 1), 127)
self.assertEqual(_segyio.get_field(hdr, 5), 67)
self.assertEqual(_segyio.get_field(hdr, 9), 19)