progressbar源码修改(支持进度条样式设置)

#!/usr/bin/python # -*- coding: utf-8 -*- # # progressbar - Text progress bar library for Python. # Copyright (c) 2005 Nilton Volpato # # This library is free software; you can redistribute it and/or # modify it under the terms of the GNU Lesser General Public # License as published by the Free Software Foundation; either # version 2.1 of the License, or (at your option) any later version. # # This library is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # Lesser General Public License for more details. # # You should have received a copy of the GNU Lesser General Public # License along with this library; if not, write to the Free Software # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA '''Text progress bar library for Python. A text progress bar is typically used to display the progress of a long running operation, providing a visual cue that processing is underway. The ProgressBar class manages the current progress, and the format of the line is given by a number of widgets. A widget is an object that may display differently depending on the state of the progress bar. There are three types of widgets: - a string, which always shows itself - a ProgressBarWidget, which may return a different value every time its update method is called - a ProgressBarWidgetHFill, which is like ProgressBarWidget, except it expands to fill the remaining width of the line. The progressbar module is very easy to use, yet very powerful. It will also automatically enable features like auto-resizing when the system supports it. ''' from __future__ import division import math import os import signal import sys import time try: from fcntl import ioctl from array import array import termios except ImportError: pass from progressbar.compat import * from progressbar.widgets import * __author__ = 'Nilton Volpato' __author_email__ = 'first-name dot last-name @ gmail.com' __date__ = '2011-05-14' __version__ = '2.3' class UnknownLength: pass class ProgressBar(object): '''The ProgressBar class which updates and prints the bar. A common way of using it is like: >>> pbar = ProgressBar().start() >>> for i in range(100): ... # do something ... pbar.update(i+1) ... >>> pbar.finish() You can also use a ProgressBar as an iterator: >>> progress = ProgressBar() >>> for i in progress(some_iterable): ... # do something ... Since the progress bar is incredibly customizable you can specify different widgets of any type in any order. You can even write your own widgets! However, since there are already a good number of widgets you should probably play around with them before moving on to create your own widgets. The term_width parameter represents the current terminal width. If the parameter is set to an integer then the progress bar will use that, otherwise it will attempt to determine the terminal width falling back to 80 columns if the width cannot be determined. When implementing a widget's update method you are passed a reference to the current progress bar. As a result, you have access to the ProgressBar's methods and attributes. Although there is nothing preventing you from changing the ProgressBar you should treat it as read only. Useful methods and attributes include (Public API): - currval: current progress (0 <= currval <= maxval) - maxval: maximum (and final) value - finished: True if the bar has finished (reached 100%) - start_time: the time when start() method of ProgressBar was called - seconds_elapsed: seconds elapsed since start_time and last call to update - percentage(): progress in percent [0..100] ''' __slots__ = ('currval', 'fd', 'finished', 'last_update_time', 'left_justify', 'maxval', 'next_update', 'num_intervals', 'poll', 'seconds_elapsed', 'signal_set', 'start_time', 'term_width', 'update_interval', 'widgets', '_time_sensitive', '__iterable') _DEFAULT_MAXVAL = 100 _DEFAULT_TERMSIZE = 80 # ------------------Modified By qianghaohao-------------------------- # _DEFAULT_WIDGETS = [Percentage(), ' ', Bar()] # Modified by qianghaohao # Date: 2016-8-16 # # ------------------------------------------------------------------- def __init__(self, maxval=None, widgets=None, term_width=None, poll=1, left_justify=True, fd=sys.stderr, bar_style = 'BST1'): '''Initializes a progress bar with sane defaults''' # Don't share a reference with any other progress bars # ------------------Modified By qianghaohao-------------------------- # Don't share a reference with any other progress bars # # Modified by qianghaohao # Date: 2016-8-16 # --------------------------------------- bar_style ---------------------------------------- # BST1 BST2 BST3 BST4 BST5 BST6 BST7 BST8 BST9 # bar_style = (u'#', u'▏', u'▎', u'▍', u'▌', u'▋', u'▊', u'▉', u'█') # ------------------------------------------------------------------------------------------ bst = { 'BST1':u'#', 'BST2':u'▏', 'BST3':u'▎', 'BST4':u'▍', 'BST5':u'▌', 'BST6':u'▋', 'BST7':u'▊', 'BST8':u'▉', 'BST9':u'█' } default_widgets = [Percentage(), ' '] default_widgets.append(Bar(bst[bar_style])) # ------------------------------------------------------------------- if widgets is None: widgets = list(default_widgets) self.maxval = maxval self.widgets = widgets self.fd = fd self.left_justify = left_justify self.signal_set = False if term_width is not None: self.term_width = term_width else: try: self._handle_resize() signal.signal(signal.SIGWINCH, self._handle_resize) self.signal_set = True except (SystemExit, KeyboardInterrupt): raise except: self.term_width = self._env_size() self.__iterable = None self._update_widgets() self.currval = 0 self.finished = False self.last_update_time = None self.poll = poll self.seconds_elapsed = 0 self.start_time = None self.update_interval = 1 def __call__(self, iterable): 'Use a ProgressBar to iterate through an iterable' try: self.maxval = len(iterable) except: if self.maxval is None: self.maxval = UnknownLength self.__iterable = iter(iterable) return self def __iter__(self): return self def __next__(self): try: value = next(self.__iterable) if self.start_time is None: self.start() else: self.update(self.currval + 1) return value except StopIteration: self.finish() raise # Create an alias so that Python 2.x won't complain about not being # an iterator. next = __next__ def _env_size(self): 'Tries to find the term_width from the environment.' return int(os.environ.get('COLUMNS', self._DEFAULT_TERMSIZE)) - 1 def _handle_resize(self, signum=None, frame=None): 'Tries to catch resize signals sent from the terminal.' h, w = array('h', ioctl(self.fd, termios.TIOCGWINSZ, '\0' * 8))[:2] self.term_width = w def percentage(self):