def __init__(self, filename, parent=None, schema=NEWEST_SCHEMA_VERSION):
self.home = filename
if os.path.exists(self.home):
# we don't cache anything, just check the magic
with open(self.home, 'rb') as f:
header = f.read(self.HEADER_SIZE)
self._schema = schema_from_header(header)
if self._schema is None:
raise UnknownMutableContainerVersionError(filename, header)
else:
self._schema = schema
self.parent = parent # for logging
def __init__(self, filename, parent=None):
self.home = filename
if os.path.exists(self.home):
# we don't cache anything, just check the magic
with open(self.home, 'rb') as f:
data = f.read(self.HEADER_SIZE)
(magic,
write_enabler_nodeid, write_enabler,
data_length, extra_least_offset) = \
struct.unpack(">32s20s32sQQ", data)
if magic != self.MAGIC:
msg = "sharefile %s had magic '%r' but we wanted '%r'" % \
(filename, magic, self.MAGIC)
raise UnknownMutableContainerVersionError(msg)
self.parent = parent # for logging