Runs a function inside a read-only datastore transaction.
google.appengine.api.datastore.RunInReadOnlyTransaction(
function, *args, **kwargs
)
A read-only transaction cannot perform writes, but may be able to execute
more efficiently.
Runs the user-provided function inside a read-only transaction, retries
default number of times.
Args |
function
|
a function to be run inside the transaction on all remaining
arguments
|
*args
|
positional arguments for function.
|
**kwargs
|
keyword arguments for function.
|
Returns |
the function's return value, if any
|
Raises |
TransactionFailedError , if the transaction could not be committed.
|