Add live_info_terminal, closes #436

[basnijholt]

Description

Use like:

python live-info-example.py

import adaptive
import asyncio
import random

offset = random.uniform(-0.5, 0.5)


def peak(x, offset=offset, wait=True):
    from random import random
    from time import sleep

    a = 0.01
    if wait:
        # we pretend that this is a slow function
        sleep(random())

    return x + a**2 / (a**2 + (x - offset) ** 2)

learner = adaptive.Learner1D(peak, bounds=(-1, 1))
runner = adaptive.Runner(learner, loss_goal=0.01)


async def run(runner, fname: str):
    runner.live_info_terminal(overwrite_previous=True)
    await runner.task
    runner.learner.save(fname)


runner.ioloop.run_until_complete(run(runner, "learner.pkl"))

Fixes #436

Checklist

• Fixed style issues using pre-commit run --all (first install using pip install pre-commit)
• pytest passed

Type of change

Check relevant option(s).

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• (Code) style fix or documentation update
• This change requires a documentation update