(self, db, bucket_name="fs",
                 chunk_size_bytes=DEFAULT_CHUNK_SIZE, write_concern=None,
                 read_preference=None)
Create a new instance of :class:`GridFSBucket`.

        Raises :exc:`TypeError` if `database` is not an instance of
        :class:`~pymongo.database.Database`.

        Raises :exc:`~pymongo.errors.ConfigurationError` if `write_concern`
        is not acknowledged.

        :Parameters:
          - `database`: database to use.
          - `bucket_name` (optional): The name of the bucket. Defaults to 'fs'.
          - `chunk_size_bytes` (optional): The chunk size in bytes. Defaults
            to 255KB.
          - `write_concern` (optional): The
            :class:`~pymongo.write_concern.WriteConcern` to use. If ``None``
            (the default) db.write_concern is used.
          - `read_preference` (optional): The read preference to use. If
            ``None`` (the default) db.read_preference is used.

        .. versionadded:: 3.1

        .. mongodoc:: gridfs
Create a new instance of :class:`GridFSBucket`.
Create a new instance of : class : GridFSBucket .
def __init__(self, db, bucket_name="fs",
                 chunk_size_bytes=DEFAULT_CHUNK_SIZE, write_concern=None,
                 read_preference=None):
        """Create a new instance of :class:`GridFSBucket`.

        Raises :exc:`TypeError` if `database` is not an instance of
        :class:`~pymongo.database.Database`.

        Raises :exc:`~pymongo.errors.ConfigurationError` if `write_concern`
        is not acknowledged.

        :Parameters:
          - `database`: database to use.
          - `bucket_name` (optional): The name of the bucket. Defaults to 'fs'.
          - `chunk_size_bytes` (optional): The chunk size in bytes. Defaults
            to 255KB.
          - `write_concern` (optional): The
            :class:`~pymongo.write_concern.WriteConcern` to use. If ``None``
            (the default) db.write_concern is used.
          - `read_preference` (optional): The read preference to use. If
            ``None`` (the default) db.read_preference is used.

        .. versionadded:: 3.1

        .. mongodoc:: gridfs
        """
        if not isinstance(db, Database):
            raise TypeError("database must be an instance of Database")

        wtc = write_concern if write_concern is not None else db.write_concern
        if not wtc.acknowledged:
            raise ConfigurationError('write concern must be acknowledged')

        self._db = db
        self._bucket_name = bucket_name
        self._collection = db[bucket_name]

        self._chunks = self._collection.chunks.with_options(
            write_concern=write_concern,
            read_preference=read_preference)

        self._files = self._collection.files.with_options(
            write_concern=write_concern,
            read_preference=read_preference)

        self._chunk_size_bytes = chunk_size_bytes
def __init__ ( self , db , bucket_name = "fs" , chunk_size_bytes = DEFAULT_CHUNK_SIZE , write_concern = None , read_preference = None ) : if not isinstance ( db , Database ) : raise TypeError ( "database must be an instance of Database" ) wtc = write_concern if write_concern is not None else db . write_concern if not wtc . acknowledged : raise ConfigurationError ( 'write concern must be acknowledged' ) self . _db = db self . _bucket_name = bucket_name self . _collection = db [ bucket_name ] self . _chunks = self . _collection . chunks . with_options ( write_concern = write_concern , read_preference = read_preference ) self . _files = self . _collection . files . with_options ( write_concern = write_concern , read_preference = read_preference ) self . _chunk_size_bytes = chunk_size_bytes