Compiler

class Compiler(ip=None, port=7472, num_workers=-1, runtime_log_level=30, worker_port=7474)

Bases: object

A compiler is responsible for accepting and managing compilation tasks.

The compiler class either spins up a parallel runtime or connects to a distributed one, which compilation tasks can then access to parallelize their operations. The compiler is implemented as a context manager and it is recommended to use it as one. If the compiler is not used in a context manager, it is the responsibility of the user to call close().

Examples

1. Use in a context manager: >>> with Compiler() as compiler: … circuit = compiler.compile(circuit, workflow)

2. Use compiler without context manager: >>> compiler = Compiler() >>> circuit = compiler.compile(circuit, workflow) >>> compiler.close()

3. Connect to an already running distributed runtime: >>> with Compiler(‘localhost’) as compiler: … circuit = compiler.compile(circuit, workflow)

4. Start and attach to a runtime with 4 worker processes: >>> with Compiler(num_workers=4) as compiler: … circuit = compiler.compile(circuit, workflow)

__init__(ip=None, port=7472, num_workers=-1, runtime_log_level=30, worker_port=7474)

Construct a Compiler object.

This will either spawn a parallel runtime if ip is None, or attempt to connect to a distributed one if ip is provided.

Parameters:

• ip (str | None) – If left as None, spawn a parallel runtime, otherwise attempt a connection with an already running runtime at this address. Defaults to None.

• port (int) – The port where a runtime is expected to be listening.

• num_workers (int) – The number of workers to spawn. Ignored if ip is None. If negative spawn as many workers as cpus on the system. (Defaults to -1)

• runtime_log_level (int) – The runtime’s logging level. This is separate from the compilation logging. If you would like logs from your compilation workflow, that setting is set during task creation in compiler.compile() or compiler.submit().

• worker_port (int) – The optional port to pass to an attached runtime. See AttachedServer for more info.

Methods

cancel(task_id)	Cancel the execution of a task in the system.
close()	Shutdown the compiler.
compile()	Submit a task, wait for its results; see submit() for more.
result(task_id)	Block until the task is finished, return its result.
status(task_id)	Retrieve the status of the specified task.
submit(task_or_circuit[, workflow, ...])	Submit a compilation job to the Compiler.