inject.py 文件源码

def download_file(self, Bucket, Key, Filename, ExtraArgs=None,
                  Callback=None, Config=None):
    """Download an S3 object to a file.

    Usage::

        import boto3
        s3 = boto3.resource('s3')
        s3.meta.client.download_file('mybucket', 'hello.txt', '/tmp/hello.txt')

    Similar behavior as S3Transfer's download_file() method,
    except that parameters are capitalized. Detailed examples can be found at
    :ref:`S3Transfer's Usage <ref_s3transfer_usage>`.
    """
    with S3Transfer(self, Config) as transfer:
        return transfer.download_file(
            bucket=Bucket, key=Key, filename=Filename,
            extra_args=ExtraArgs, callback=Callback)