/usr/lib/python3/dist-packages/pyprind/prog_class.py is in python3-pyprind 2.11.1-1.
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Sebastian Raschka 2014-2017
Python Progress Indicator Utility
Author: Sebastian Raschka <sebastianraschka.com>
License: BSD 3 clause
Contributors: https://github.com/rasbt/pyprind/graphs/contributors
Code Repository: https://github.com/rasbt/pyprind
PyPI: https://pypi.python.org/pypi/PyPrind
"""
import time
import sys
import os
from io import UnsupportedOperation
try:
import psutil
psutil_import = True
except ImportError:
psutil_import = False
class Prog():
def __init__(self, iterations, track_time, stream, title,
monitor, update_interval=None):
""" Initializes tracking object. """
self.cnt = 0
self.title = title
self.max_iter = float(iterations) # to support Python 2.x
self.track = track_time
self.start = time.time()
self.end = None
self.item_id = None
self.eta = None
self.total_time = 0.0
self.last_time = self.start
self.monitor = monitor
self.stream = stream
self.active = True
self._stream_out = self._no_stream
self._stream_flush = self._no_stream
self._check_stream()
self._print_title()
self.update_interval = update_interval
self._cached_output = ''
sys.stdout.flush()
sys.stderr.flush()
if monitor:
if not psutil_import:
raise ValueError('psutil package is required when using'
' the `monitor` option.')
else:
self.process = psutil.Process()
if self.track:
self.eta = 1
def update(self, iterations=1, item_id=None, force_flush=False):
"""
Updates the progress bar / percentage indicator.
Parameters
----------
iterations : int (default: 1)
default argument can be changed to integer values
>=1 in order to update the progress indicators more than once
per iteration.
item_id : str (default: None)
Print an item_id sring behind the progress bar
force_flush : bool (default: False)
If True, flushes the progress indicator to the output screen
in each iteration.
"""
self.item_id = item_id
self.cnt += iterations
self._print(force_flush=force_flush)
self._finish()
def stop(self):
"""Stops the progress bar / percentage indicator if necessary."""
self.cnt = self.max_iter
self._finish()
def _check_stream(self):
"""Determines which output stream (stdout, stderr, or custom) to use"""
if self.stream:
try:
supported = ('PYCHARM_HOSTED' in os.environ or
os.isatty(sys.stdout.fileno()))
# a fix for IPython notebook "IOStream has no fileno."
except(UnsupportedOperation):
supported = True
else:
if self.stream is not None and hasattr(self.stream, 'write'):
self._stream_out = self.stream.write
self._stream_flush = self.stream.flush
if supported:
if self.stream == 1:
self._stream_out = sys.stdout.write
self._stream_flush = sys.stdout.flush
elif self.stream == 2:
self._stream_out = sys.stderr.write
self._stream_flush = sys.stderr.flush
else:
if self.stream is not None and hasattr(self.stream, 'write'):
self._stream_out = self.stream.write
self._stream_flush = self.stream.flush
else:
print('Warning: No valid output stream.')
def _elapsed(self):
""" Returns elapsed time at update. """
self.last_time = time.time()
return self.last_time - self.start
def _calc_eta(self):
""" Calculates estimated time left until completion. """
elapsed = self._elapsed()
if self.cnt == 0 or elapsed < 0.001:
return None
rate = float(self.cnt) / elapsed
self.eta = (float(self.max_iter) - float(self.cnt)) / rate
def _calc_percent(self):
"""Calculates the rel. progress in percent with 2 decimal points."""
return round(self.cnt / self.max_iter * 100, 2)
def _no_stream(self, text=None):
""" Called when no valid output stream is available. """
pass
def _get_time(self, _time):
if (_time < 86400):
return time.strftime("%H:%M:%S", time.gmtime(_time))
else:
s = (str(int(_time // 3600)) + ':' +
time.strftime("%M:%S", time.gmtime(_time)))
return s
def _finish(self):
""" Determines if maximum number of iterations (seed) is reached. """
if self.cnt >= self.max_iter:
self.total_time = self._elapsed()
self.end = time.time()
self.last_progress -= 1 # to force a refreshed _print()
self._print()
if self.track:
self._stream_out('\nTotal time elapsed: ' +
self._get_time(self.total_time))
self._stream_out('\n')
self.active = False
def _print_title(self):
""" Prints tracking title at initialization. """
if self.title:
self._stream_out('{}\n'.format(self.title))
self._stream_flush()
def _cache_eta(self):
""" Prints the estimated time left."""
self._calc_eta()
self._cached_output += ' | ETA: ' + self._get_time(self.eta)
def _cache_item_id(self):
""" Prints an item id behind the tracking object."""
self._cached_output += ' | Item ID: %s' % self.item_id
def __repr__(self):
str_start = time.strftime('%m/%d/%Y %H:%M:%S',
time.localtime(self.start))
str_end = time.strftime('%m/%d/%Y %H:%M:%S',
time.localtime(self.end))
self._stream_flush()
time_info = 'Title: {}\n'\
' Started: {}\n'\
' Finished: {}\n'\
' Total time elapsed: '.format(self.title,
str_start,
str_end)\
+ self._get_time(self.total_time)
if self.monitor:
try:
cpu_total = self.process.cpu_percent()
mem_total = self.process.memory_percent()
except AttributeError: # old version of psutil
cpu_total = self.process.get_cpu_percent()
mem_total = self.process.get_memory_percent()
cpu_mem_info = ' CPU %: {:.2f}\n'\
' Memory %: {:.2f}'.format(cpu_total, mem_total)
return time_info + '\n' + cpu_mem_info
else:
return time_info
def __str__(self):
return self.__repr__()
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