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Merge pull request #24 from jimrybarski/23-bug-revert-deletion

resolves #23 - fixed bug due to improperly refactored logic condition
feature/load_slices
Jim Rybarski 10 years ago
parent
commit
f037a77447
1 changed files with 17 additions and 19 deletions
  1. +17
    -19
      nd2reader/parser.py

+ 17
- 19
nd2reader/parser.py View File

@ -22,7 +22,7 @@ class Nd2Parser(object):
self._filename = filename
self._fh = None
self._chunk_map_start_location = None
self._cursor_position = None
self._cursor_position = 0
self._dimension_text = None
self._label_map = {}
self.metadata = {}
@ -62,11 +62,10 @@ class Nd2Parser(object):
def _parse_metadata(self):
for label in self._label_map.keys():
if not label.endswith("LV!") or "LV|" in label:
continue
data = self._read_chunk(self._label_map[label])
stop = label.index("LV")
self.metadata[label[:stop]] = self._read_metadata(data, 1)
if label.endswith("LV!") or "LV|" in label:
data = self._read_chunk(self._label_map[label])
stop = label.index("LV")
self.metadata[label[:stop]] = self._read_metadata(data, 1)
def _read_map(self):
"""
@ -134,10 +133,9 @@ class Nd2Parser(object):
array_length = struct.unpack("Q", data.read(8))[0]
return array.array("B", data.read(array_length))
def _parse_metadata_item(self, args):
data, cursor_position = args
def _parse_metadata_item(self, data):
new_count, length = struct.unpack("<IQ", data.read(12))
length -= data.tell() - cursor_position
length -= data.tell() - self._cursor_position
next_data_length = data.read(length)
value = self._read_metadata(next_data_length, new_count)
# Skip some offsets
@ -145,15 +143,15 @@ class Nd2Parser(object):
return value
def _get_value(self, data, data_type):
parser = {1: {'method': self._parse_unsigned_char, 'args': data},
2: {'method': self._parse_unsigned_int, 'args': data},
3: {'method': self._parse_unsigned_int, 'args': data},
5: {'method': self._parse_unsigned_long, 'args': data},
6: {'method': self._parse_double, 'args': data},
8: {'method': self._parse_string, 'args': data},
9: {'method': self._parse_char_array, 'args': data},
11: {'method': self._parse_metadata_item, 'args': (data, self._cursor_position)}}
return parser[data_type]['method'](parser[data_type]['args'])
parser = {1: self._parse_unsigned_char,
2: self._parse_unsigned_int,
3: self._parse_unsigned_int,
5: self._parse_unsigned_long,
6: self._parse_double,
8: self._parse_string,
9: self._parse_char_array,
11: self._parse_metadata_item}
return parser[data_type](data)
def _read_metadata(self, data, count):
data = StringIO(data)
@ -166,7 +164,7 @@ class Nd2Parser(object):
data_type, name_length = map(ord, header)
name = data.read(name_length * 2).decode("utf16")[:-1].encode("utf8")
value = self._get_value(data, data_type)
if name not in metadata:
if name not in metadata.keys():
metadata[name] = value
else:
if not isinstance(metadata[name], list):


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