def __init__(self, path, serializer=None): if serializer is None: serializer = UnicodeSerializer() # by default, just write to file as utf-8 encoded strings self._path = path self._ser = serializer # open or create the corresponding file self._f_read = open_or_create(path, 'r') # for reading only self._f_write = open_or_create(path, 'a') # for appending. Stream positioned at end of file. # create metadata self._offsets = FileSequenceOffsets(self) # note: this must come before metadata self._meta = FileSequenceMetaData(self)
def __init__(self, path): self._path = path self._f = open_or_create(self._path, 'r+') s = self._f.read() if len(s) == 0: self._d = {} else: self._d = json.loads(s)
def __init__(self, path, serializer=None): if serializer is None: serializer = UnicodeSerializer( ) # by default, just write to file as utf-8 encoded strings self._path = path self._ser = serializer # open or create the corresponding file self._f_read = open_or_create(path, 'r') # for reading only self._f_write = open_or_create( path, 'a') # for appending. Stream positioned at end of file. # create metadata self._offsets = FileSequenceOffsets( self) # note: this must come before metadata self._meta = FileSequenceMetaData(self)
def __init__(self, path): self._path = path self._f = open_or_create(self._path, 'r+') s = self._f.read() if len(s) == 0: self._d = {} else: self._d = json.loads(s)
def __init__(self, file_seq): offsets_path = file_seq.path + '.offsets' file_existed = os.path.isfile(offsets_path) # check if file already existed self._f_write = open_or_create(offsets_path, 'a') # open for appending only if file_existed: # load offsets from file into memory with open(offsets_path, 'r') as f: self._offsets = [int(line) for line in f] # int cast strips newline automatically else: # build offsets (in-memory and on-file) self._offsets = [] current_offset = 0 for line in file_seq.iter_raw_lines(): self.append(current_offset) current_offset += len(line) self._offsets_path = offsets_path
def __init__(self, file_seq): offsets_path = file_seq.path + '.offsets' file_existed = os.path.isfile( offsets_path) # check if file already existed self._f_write = open_or_create(offsets_path, 'a') # open for appending only if file_existed: # load offsets from file into memory with open(offsets_path, 'r') as f: self._offsets = [int(line) for line in f ] # int cast strips newline automatically else: # build offsets (in-memory and on-file) self._offsets = [] current_offset = 0 for line in file_seq.iter_raw_lines(): self.append(current_offset) current_offset += len(line) self._offsets_path = offsets_path