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Progress.py
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Progress.py
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#!/bin/python
# This file is part of INDXParse.
#
# Copyright 2013 Willi Ballenthin <william.ballenthin@mandiant.com>
# while at Mandiant <http://www.mandiant.com>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
class Progress(object):
"""
An interface to things that track the progress of a long running task.
"""
def __init__(self, max_):
super(Progress, self).__init__()
self._max = max_
self._current = 0
def set_current(self, current):
"""
Set the number of steps that this task has completed.
@type current: int
"""
self._current = current
def set_complete(self):
"""
Convenience method to set the task as having completed all steps.
"""
self._current = self._max
class NullProgress(Progress):
"""
A Progress class that ignores any updates.
"""
def __init__(self, max_):
super(NullProgress, self).__init__(max_)
def set_current(self, current):
pass
class ProgressBarProgress(Progress):
def __init__(self, max_):
from progressbar import Bar
from progressbar import ETA
from progressbar import ProgressBar
super(ProgressBarProgress, self).__init__(max_)
widgets = ["Progress: ",
Bar(marker="=", left="[", right="]"), " ",
ETA(), " ", ]
self._pbar = ProgressBar(widgets=widgets, maxval=self._max)
self._has_notified_started = False
def set_current(self, current):
if not self._has_notified_started:
self._pbar.start()
self._has_notified_started = True
self._pbar.update(current)
def set_complete(self):
self._pbar.finish()