def make_time_units_string(time):
"""
This takes a time (in seconds) and converts it to an easy-to-read format with the appropriate units.
:param time: the time to make into a string (in seconds)
:type time: Integer
:return: an easy-to-read string representation of the time
:rtype: String
"""
# Show the time with appropriate units.
if time < 1:
return trunc(time * 1000) + " milliseconds"
elif time < 60:
return trunc(time) + " seconds"
elif time < 3600:
return trunc(time / 60) + " minutes"
else:
return trunc(time / 3600) + " hours"
def make_time_units_string(time):
"""
This takes a time (in seconds) and converts it to an easy-to-read format with the appropriate units.
:param time: the time to make into a string (in seconds)
:type time: Integer
:return: an easy-to-read string representation of the time
:rtype: String
"""
# Show the time with appropriate units.
if time < 1:
return trunc(time*1000)+" milliseconds"
elif time < 60:
return trunc(time)+" seconds"
elif time < 3600:
return trunc(time/60)+" minutes"
else:
return trunc(time/3600)+" hours"
def make_time_units_string(time):
"""
This takes a time (in seconds) and converts it to an easy-to-read format with the appropriate units.
Parameters
----------
time : int
The time to make into a string (in seconds). Normally from computing differences in time.time().
Returns
-------
str
An easy-to-read string representation of the time i.e. "x hours", "x minutes", etc.
"""
# Show the time with appropriate units.
if time < 1:
return trunc(time * 1000) + " milliseconds"
elif time < 60:
return trunc(time) + " seconds"
elif time < 3600:
return trunc(time / 60) + " minutes"
else:
return trunc(time / 3600) + " hours"
def make_time_units_string(time):
"""
This takes a time (in seconds) and converts it to an easy-to-read format with the appropriate units.
Parameters
----------
time : int
The time to make into a string (in seconds). Normally from computing differences in time.time().
Returns
-------
str
An easy-to-read string representation of the time i.e. "x hours", "x minutes", etc.
"""
# Show the time with appropriate units.
if time < 1:
return trunc(time*1000)+" milliseconds"
elif time < 60:
return trunc(time)+" seconds"
elif time < 3600:
return trunc(time/60)+" minutes"
else:
return trunc(time/3600)+" hours"
def _perform_one_epoch(self, f_learn):
self.epoch_counter += 1
t = time.time()
log.info('EPOCH %s', str(self.epoch_counter))
# set the noise switches on for training function! (this is where things like dropout happen)
if len(self.noise_switches) > 0:
log.debug("Turning on %s noise switches", str(len(self.noise_switches)))
switch_vals = [switch.get_value() for switch in self.noise_switches]
[switch.set_value(0.) for switch in self.noise_switches]
# train
train_costs = []
train_monitors = {key: [] for key in self.monitors.keys()}
for batch_start, batch_end in self.train_batches:
train_costs.append(f_learn(batch_start, batch_end))
self.call_monitors(monitor_function=self.train_monitor_function,
monitors_dict=train_monitors,
inputs=[batch_start, batch_end])
log.info('Train cost: %s', trunc(numpy.mean(train_costs, 0)))
if len(self.monitors.keys()) > 0:
log.info('Train monitors: %s',
str({key: numpy.mean(value, 0) for key, value in train_monitors.items()}))
# set the noise switches off for valid and test sets! we assume unseen data is noisy anyway :)
if len(self.noise_switches) > 0:
log.debug("Turning off %s noise switches", str(len(self.noise_switches)))
[switch.set_value(0.) for switch in self.noise_switches]
# valid
if self.dataset.hasSubset(VALID) and len(self.monitors.keys()) > 0:
valid_monitors = {key: [] for key in self.monitors.keys()}
for batch_start, batch_end in self.valid_batches:
self.call_monitors(monitor_function=self.valid_monitor_function,
monitors_dict=valid_monitors,
inputs=[batch_start, batch_end])
log.info('Valid monitors: %s',
str({key: numpy.mean(value, 0) for key, value in valid_monitors.items()}))
#test
if self.dataset.hasSubset(TEST) and len(self.monitors.keys()) > 0:
test_monitors = {key: [] for key in self.monitors.keys()}
for batch_start, batch_end in self.test_batches:
self.call_monitors(monitor_function=self.test_monitor_function,
monitors_dict=test_monitors,
inputs=[batch_start, batch_end])
log.info('Test monitors: %s', str({key: numpy.mean(value, 0) for key, value in test_monitors.items()}))
# check for early stopping on train costs
cost = numpy.sum(train_costs)
if cost < self.best_cost * self.early_stop_threshold:
self.patience = 0
self.best_cost = cost
# save the parameters that made it the best
self.best_params = get_shared_values(self.params)
else:
self.patience += 1
# check for stopping either from n_epochs or from threshold/patience
stop = False
if self.epoch_counter >= self.n_epoch:
log.info("Stopping (reached max number of epochs)...")
stop = True
if self.patience >= self.early_stop_length:
log.info("Stopping early (reached stop threshold)...")
stop = True
timing = time.time() - t
self.times.append(timing)
log.info('time: ' + make_time_units_string(timing))
log.info('remaining time: ' +
make_time_units_string((self.n_epoch - self.epoch_counter) * numpy.mean(self.times)))
if (self.epoch_counter % self.save_frequency) == 0:
#save params
self.model.save_params('trained_epoch_' + str(self.epoch_counter) + '.pkl')
# ANNEAL!
if not stop:
if hasattr(self, 'learning_rate_decay') and self.learning_rate_decay:
self.learning_rate_decay.decay()
if hasattr(self, 'momentum_decay') and self.momentum_decay:
self.momentum_decay.decay()
for decay_param in self.model.get_decay_params():
decay_param.decay()
# reset the switches
if len(self.noise_switches) > 0:
[switch.set_value(val) for switch, val in zip(self.noise_switches, switch_vals)]
# return whether or not to stop this epoch
return stop
def _perform_one_epoch(self):
self.epoch_counter += 1
t = time.time()
log.info('EPOCH %s', str(self.epoch_counter))
#train
train_costs = []
train_monitors = {key: [] for key in self.monitors.keys()}
for x, y in self.iterator(self.dataset, datasets.TRAIN,
self.batch_size, self.minimum_batch_size,
self.rng):
if self.unsupervised:
train_costs.append(self.f_learn(x))
for key in self.monitors.keys():
monitor_function = self.monitors[key]
train_monitors[key].append(monitor_function(x))
else:
train_costs.append(self.f_learn(x, y))
for key in self.monitors.keys():
monitor_function = self.monitors[key]
train_monitors[key].append(monitor_function(x, y))
log.info('Train cost: %s', trunc(numpy.mean(train_costs, 0)))
if len(self.monitors.keys()) > 0:
log.info(
'Train monitors: %s',
str({
key: numpy.mean(value, 0)
for key, value in train_monitors.items()
}))
#valid
if self.dataset.hasSubset(
datasets.VALID) and len(self.monitors.keys()) > 0:
valid_monitors = {key: [] for key in self.monitors.keys()}
for x, y in self.iterator(self.dataset, datasets.VALID,
self.batch_size, self.minimum_batch_size,
self.rng):
if self.unsupervised:
for key in self.monitors.keys():
monitor_function = self.monitors[key]
valid_monitors[key].append(monitor_function(x))
else:
for key in self.monitors.keys():
monitor_function = self.monitors[key]
valid_monitors[key].append(monitor_function(x, y))
log.info(
'Valid monitors: %s',
str({
key: numpy.mean(value, 0)
for key, value in valid_monitors.items()
}))
#test
if self.dataset.hasSubset(
datasets.TEST) and len(self.monitors.keys()) > 0:
test_monitors = {key: [] for key in self.monitors.keys()}
for x, y in self.iterator(self.dataset, datasets.TEST,
self.batch_size, self.minimum_batch_size,
self.rng):
if self.unsupervised:
for key in self.monitors.keys():
monitor_function = self.monitors[key]
test_monitors[key].append(monitor_function(x))
else:
for key in self.monitors.keys():
monitor_function = self.monitors[key]
test_monitors[key].append(monitor_function(x, y))
log.info(
'Test monitors: %s',
str({
key: numpy.mean(value, 0)
for key, value in test_monitors.items()
}))
# check for early stopping on train costs
cost = numpy.sum(train_costs)
if cost < self.best_cost * self.early_stop_threshold:
self.patience = 0
self.best_cost = cost
# save the parameters that made it the best
self.best_params = get_shared_values(self.params)
else:
self.patience += 1
if self.epoch_counter >= self.n_epoch or self.patience >= self.early_stop_length:
log.info("Stopping early...")
self.STOP = True
timing = time.time() - t
self.times.append(timing)
log.info('time: ' + make_time_units_string(timing))
log.info('remaining time: ' +
make_time_units_string((self.n_epoch - self.epoch_counter) *
numpy.mean(self.times)))
if (self.epoch_counter % self.save_frequency) == 0:
#save params
self.model.save_params('trained_epoch_' + str(self.epoch_counter) +
'.pkl')
# ANNEAL!
if hasattr(self, 'learning_rate_decay'):
self.learning_rate_decay.decay()
if hasattr(self, 'momentum_decay'):
self.momentum_decay.decay()
for decay_param in self.model.get_decay_params():
decay_param.decay()
def _perform_one_epoch(self, f_learn, plot=None):
"""
Performs a single training iteration with the given learn function.
"""
self.epoch_counter += 1
t = time.time()
log.info('EPOCH %s', str(self.epoch_counter))
# set the noise switches on for training function! (this is where things like dropout happen)
switch_vals = []
if len(self.noise_switches) > 0 and (self.valid_flag or self.test_flag or self.epoch_counter == 1):
log.debug("Turning on %s noise switches", str(len(self.noise_switches)))
switch_vals = [switch.get_value() for switch in self.noise_switches]
[switch.set_value(1.) for switch in self.noise_switches]
# train
train_costs = []
train_monitors = {key: [] for key in self.train_monitors_dict.keys()}
for batch_start, batch_end in self.train_batches:
_outs = raise_to_list(f_learn(batch_start, batch_end))
train_costs.append(_outs[0])
# handle any user defined monitors
if len(train_monitors) > 0:
current_monitors = zip(self.train_monitors_dict.keys(), _outs[1:])
for name, val in current_monitors:
train_monitors[name].append(val)
# get the mean values for the batches
mean_train = numpy.mean(train_costs, 0)
current_mean_monitors = {key: numpy.mean(vals, 0) for key, vals in train_monitors.items()}
# log the mean values!
log.info('Train cost: %s', trunc(mean_train))
if len(current_mean_monitors) > 0:
log.info('Train monitors: %s', str(current_mean_monitors))
# send the values to their outservices
if self.train_outservice:
self.train_outservice.write(mean_train, TRAIN)
for name, service in self.train_monitors_outservice_dict.items():
if name in current_mean_monitors and service:
service.write(current_mean_monitors[name], TRAIN)
# if there is a plot, also send them over!
if plot:
current_mean_monitors.update({TRAIN_COST_KEY: mean_train})
plot.update_plots(epoch=self.epoch_counter, monitors=current_mean_monitors)
# set the noise switches off for valid and test sets! we assume unseen data is noisy anyway :)
if len(self.noise_switches) > 0 and (self.valid_flag or self.test_flag):
log.debug("Turning off %s noise switches", str(len(self.noise_switches)))
[switch.set_value(0.) for switch in self.noise_switches]
# valid
if self.valid_flag:
valid_monitors = {key: [] for key in self.valid_monitors_dict.keys()}
for batch_start, batch_end in self.valid_batches:
_outs = raise_to_list(self.valid_monitor_function(batch_start, batch_end))
current_monitors = zip(self.valid_monitors_dict.keys(), _outs)
for name, val in current_monitors:
valid_monitors[name].append(val)
# get the mean values for the batches
current_mean_monitors = {key: numpy.mean(vals, 0) for key, vals in valid_monitors.items()}
# log the mean values!
log.info('Valid monitors: %s', str(current_mean_monitors))
# send the values to their outservices
for name, service in self.valid_monitors_outservice_dict.items():
if name in current_mean_monitors and service:
service.write(current_mean_monitors[name], VALID)
# if there is a plot, also send them over!
if plot:
plot.update_plots(epoch=self.epoch_counter, monitors=current_mean_monitors)
#test
if self.test_flag:
test_monitors = {key: [] for key in self.test_monitors_dict.keys()}
for batch_start, batch_end in self.test_batches:
_outs = raise_to_list(self.test_monitor_function(batch_start, batch_end))
current_monitors = zip(self.test_monitors_dict.keys(), _outs)
for name, val in current_monitors:
test_monitors[name].append(val)
# get the mean values for the batches
current_mean_monitors = {key: numpy.mean(vals, 0) for key, vals in test_monitors.items()}
# log the mean values!
log.info('Test monitors: %s', str(current_mean_monitors))
# send the values to their outservices
for name, service in self.test_monitors_outservice_dict.items():
if name in current_mean_monitors and service:
service.write(current_mean_monitors[name], TEST)
# if there is a plot, also send them over!
if plot:
plot.update_plots(epoch=self.epoch_counter, monitors=current_mean_monitors)
# check for early stopping on train costs
cost = numpy.sum(train_costs)
if cost < self.best_cost * self.early_stop_threshold:
self.patience = 0
self.best_cost = cost
# save the parameters that made it the best
self.best_params = get_shared_values(self.params)
else:
self.patience += 1
# check for stopping either from n_epochs or from threshold/patience
stop = False
if self.epoch_counter >= self.n_epoch:
log.info("Stopping (reached max number of epochs)...")
stop = True
if self.patience >= self.early_stop_length:
log.info("Stopping early (reached stop threshold)...")
stop = True
timing = time.time() - t
self.times.append(timing)
log.info('time: ' + make_time_units_string(timing))
log.debug('remaining time: ' +
make_time_units_string((self.n_epoch - self.epoch_counter) * numpy.mean(self.times)))
if (self.epoch_counter % self.save_frequency) == 0:
#save params
self.model.save_params('trained_epoch_' + str(self.epoch_counter) + '.pkl')
# ANNEAL!
if not stop:
# perform the appropriate decay on the decay functions/parameters for this optimizer and model
for decay_param in self.get_decay_params():
decay_param.decay()
# reset the switches
if len(self.noise_switches) > 0:
[switch.set_value(val) for switch, val in zip(self.noise_switches, switch_vals)]
# return whether or not to stop this epoch
return stop