RuntimeError: Intra op parallelism cannot be modified after initialization. 

Issue : (In google colab) the following error is flashed when trying to set number of threads.

RuntimeError: Intra op parallelism cannot be modified after initialization.

Following code is responsible for this error:

tf.config.threading.set_intra_op_parallelism_threads(1)

tf.config.threading.set_inter_op_parallelism_threads(1)

It allows to change inter op parallelism, but not intra op parallelism.

Solution: Restart the runtime and the error will go.

The error will not be flashed if the above code is already there by the time you start afresh.