utils.py

import pickle
from visdom import Visdom
import numpy as np


def save_obj(obj, filename):
    f = open(filename, 'wb')
    pickle.dump(obj, f)
    f.close()
    print "Saved object to %s." % filename


def load_obj(filename):
    f = open(filename, 'rb')
    obj = pickle.load(f)
    f.close()
    return obj


class AverageMeter(object):
    """Computes and stores the average and current value"""
    def __init__(self):
        self.reset()

    def reset(self):
        self.val = 0
        self.avg = 0
        self.sum = 0
        self.count = 0

    def update(self, val, n=1):
        self.val = val
        self.sum += val * n
        self.count += n
        self.avg = self.sum / self.count

class VisdomLinePlotter(object):
    """Plots to Visdom"""
    def __init__(self, env_name='main'):
        self.viz = Visdom()
        self.env = env_name
        self.plots = {}
    def plot(self, var_name, split_name, title_name, x, y):
        if var_name not in self.plots:
            self.plots[var_name] = self.viz.line(X=np.array([x,x]), Y=np.array([y,y]), env=self.env, opts=dict(
                legend=[split_name],
                title=title_name,
                xlabel='Epochs',
                ylabel=var_name
            ))
        else:
            self.viz.line(X=np.array([x]), Y=np.array([y]), env=self.env, win=self.plots[var_name], name=split_name, update = 'append')