google.appengine.api.blobstore.fetch_data_async

Asynchronously fetches the data for a blob.

View aliases

Main aliases

`google.appengine.api.blobstore.blobstore.fetch_data_async`

google.appengine.api.blobstore.fetch_data_async(
    blob_key, start_index, end_index, rpc=None
)

Args
blob_key	A BlobKey, string, or Unicode representation of a BlobKey of the blob from which you want to fetch data.
start_index	The start index value of the blob data to fetch. This argument cannot be set to a negative value.
end_index	The end index value (exclusive) of the blob data to fetch. This argument must be greater than or equal to the start_index value.
rpc	Optional UserRPC object.

Returns
A UserRPC whose result will be a string as returned by fetch_data().