:doc:`Object <index>` / Action / download_fileobj

****************
download_fileobj
****************



.. py:method:: S3.Object.download_fileobj(Fileobj, ExtraArgs=None, Callback=None, Config=None)

    
  Download this object from S3 to a file-like object.
  
  The file-like object must be in binary mode.
  
  This is a managed transfer which will perform a multipart download in
  multiple threads if necessary.
  
  Usage::
  
      import boto3
      s3 = boto3.resource('s3')
      bucket = s3.Bucket('amzn-s3-demo-bucket')
      obj = bucket.Object('mykey')
  
      with open('filename', 'wb') as data:
          obj.download_fileobj(data)
  
  :type Fileobj: a file-like object
  :param Fileobj: A file-like object to download into. At a minimum, it must
      implement the `write` method and must accept bytes.
  
  :type ExtraArgs: dict
  :param ExtraArgs: Extra arguments that may be passed to the
      client operation. For allowed download arguments see
      :py:attr:`boto3.s3.transfer.S3Transfer.ALLOWED_DOWNLOAD_ARGS`.
  
  :type Callback: function
  :param Callback: A method which takes a number of bytes transferred to
      be periodically called during the download.
  
  :type Config: boto3.s3.transfer.TransferConfig
  :param Config: The transfer configuration to be used when performing the
      download.
