Experimaestro is a computer science experiment manager whose goals are:

To decompose experiments into a set of parameterizable tasks
Schedule tasks and handle dependencies between tasks
Avoids to re-run the same task two times by computing unique task IDs dependending on the parameters
Handle experimental parameters through tags

The full documentation can be read by going to the following URL: https://experimaestro-python.readthedocs.io

Install

With pip

You can then install the package using pip install experimaestro

Develop

Checkout the git directory, then

pip install -e .

Example

This very simple example shows how to submit two tasks that concatenate two strings. Under the curtain,

A directory is created for each task (in workdir/jobs/helloworld.add/HASHID) based on a unique ID computed from the parameters
Two processes for Say are launched (there are no dependencies, so they will be run in parallel)
A tag y is created for the main task

# --- Task and types definitions

import logging
logging.basicConfig(level=logging.DEBUG)
from pathlib import Path
from experimaestro import Task, Param, experiment, progress
import click
import time
import os
from typing import List

# --- Just to be able to monitor the tasks

def slowdown(sleeptime: int, N: int):
    logging.info("Sleeping %ds after each step", sleeptime)
    for i in range(N):
        time.sleep(sleeptime)
        progress((i+1)/N)


# --- Define the tasks

class Say(Task):
    word: Param[str]
    sleeptime: Param[float]

    def execute(self):
        slowdown(self.sleeptime, len(self.word))
        print(self.word.upper(),)

class Concat(Task):
    strings: Param[List[Say]]
    sleeptime: Param[float]

    def execute(self):
        says = []
        slowdown(self.sleeptime, len(self.strings))
        for string in self.strings:
            with open(string.__xpm_stdout__) as fp:
                says.append(fp.read().strip())
        print(" ".join(says))


# --- Defines the experiment

@click.option("--port", type=int, default=12345, help="Port for monitoring")
@click.option("--sleeptime", type=float, default=2, help="Sleep time")
@click.argument("workdir", type=Path)
@click.command()
def cli(port, workdir, sleeptime):
    """Runs an experiment"""
    # Sets the working directory and the name of the xp
    with experiment(workdir, "helloworld", port=port) as xp:
        # Submit the tasks
        hello = Say(word="hello", sleeptime=sleeptime).submit()
        world = Say(word="world", sleeptime=sleeptime).submit()

        # Concat will depend on the two first tasks
        Concat(strings=[hello, world], sleeptime=sleeptime).tag("y", 1).submit()


if __name__ == "__main__":
    cli()

which can be launched with python test.py /tmp/helloworld-workdir