s3transfer/upload.py
def _get_upload_input_manager_cls(self, transfer_future):
        """Retrieves a class for managing input for an upload based on file type

        :type transfer_future: s3transfer.futures.TransferFuture
        :param transfer_future: The transfer future for the request

        :rtype: class of UploadInputManager
        :returns: The appropriate class to use for managing a specific type of
            input for uploads.
        """
        upload_manager_resolver_chain = [
            UploadFilenameInputManager,
            UploadSeekableInputManager,
            UploadNonSeekableInputManager
        ]

        fileobj = transfer_future.meta.call_args.fileobj
        for upload_manager_cls in upload_manager_resolver_chain:
            if upload_manager_cls.is_compatible(fileobj):
                return upload_manager_cls
        raise RuntimeError(
            'Input %s of type: %s is not supported.' % (
                fileobj, type(fileobj)))
def _get_upload_input_manager_cls(self, transfer_future):
        """Retrieves a class for managing input for an upload based on file type

        :type transfer_future: s3transfer.futures.TransferFuture
        :param transfer_future: The transfer future for the request

        :rtype: class of UploadInputManager
        :returns: The appropriate class to use for managing a specific type of
            input for uploads.
        """
        upload_manager_resolver_chain = [
            UploadFilenameInputManager,
            UploadSeekableInputManager,
            UploadNonSeekableInputManager
        ]

        fileobj = transfer_future.meta.call_args.fileobj
        for upload_manager_cls in upload_manager_resolver_chain:
            if upload_manager_cls.is_compatible(fileobj):
                return upload_manager_cls
        raise RuntimeError(
            'Input %s of type: %s is not supported.' % (
                fileobj, type(fileobj)))
Retrieves a class for managing input for an upload based on file type

        :type transfer_future: s3transfer.futures.TransferFuture
        :param transfer_future: The transfer future for the request

        :rtype: class of UploadInputManager
        :returns: The appropriate class to use for managing a specific type of
            input for uploads.