blessed_demo.py

from __future__ import print_function

# std
from collections import defaultdict
import random
import time

# 3rd-party
from blessed import Terminal


TERM = Terminal()


def main():

    models = ['source', 'migration', 'step', 'target', 'image']
    is_discarded = [True, False]

    statistics = dict(
        total=0,
        saved=0,
        discarded=0,
        per_model=defaultdict(lambda: dict(saved=0, discarded=0))
    )

    for _ in range(100):
        model = random.choice(models)
        is_saved = random.choice(is_discarded)
        op_state = 'saved' if is_saved else 'discarded'
        # update statistics
        statistics[op_state] += 1
        statistics['per_model'][model][op_state] += 1
        statistics['total'] += 1

        render(statistics)
        time.sleep(.2)


def render(statistics):
    with TERM.fullscreen(), TERM.hidden_cursor(), TERM.location(0, 0):
        for model, stat in statistics['per_model'].iteritems():
            print('{model}: {saved}, {discarded}'.format(
                model=model,
                saved=stat['saved'],
                discarded=stat['discarded']
            ))

        print('-' * 30)
        print('total saved: {}'.format(statistics['saved']))
        print('total discarded: {}'.format(statistics['discarded']))
        print('-' * 30)
        print('total: {}'.format(statistics['total']))

if __name__ == '__main__':
    main()