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TODO: Is there anything that gets a better update when the window
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is resized while the program is running?
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return int(os.environ['COLUMNS'])
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except (IndexError, KeyError, ValueError):
71
class ProgressBar(object):
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def ProgressBar(to_file=sys.stderr, **kwargs):
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"""Abstract factory"""
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if _supports_progress(to_file):
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return TTYProgressBar(to_file=to_file, **kwargs)
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return DotsProgressBar(to_file=to_file, **kwargs)
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class _BaseProgressBar(object):
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self.to_file = to_file
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self.last_total = None
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self.show_pct = show_pct
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self.show_spinner = show_spinner
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self.show_eta = show_eta
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self.show_bar = show_bar
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self.show_count = show_count
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class DummyProgress(_BaseProgressBar):
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"""Progress-bar standin that does nothing.
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This can be used as the default argument for methods that
105
take an optional progress indicator."""
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def update(self, msg=None, current=None, total=None):
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class DotsProgressBar(_BaseProgressBar):
117
def __init__(self, **kwargs):
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_BaseProgressBar.__init__(self, **kwargs)
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def update(self, msg=None, current_cnt=None, total_cnt=None):
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if msg and msg != self.last_msg:
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self.to_file.write('\n')
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self.to_file.write(msg + ': ')
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self.to_file.write('.')
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self.to_file.write('\n')
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class TTYProgressBar(_BaseProgressBar):
72
141
"""Progress bar display object.
74
143
Several options are available to control the display. These can
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160
SPIN_CHARS = r'/-\|'
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MIN_PAUSE = 0.1 # seconds
104
object.__init__(self)
105
self.to_file = to_file
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self.suppressed = not _supports_progress(self.to_file)
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def __init__(self, **kwargs):
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_BaseProgressBar.__init__(self, **kwargs)
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166
self.spin_pos = 0
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self.last_total = None
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self.show_pct = show_pct
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self.show_spinner = show_spinner
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self.show_eta = show_eta
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self.show_bar = show_bar
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self.show_count = show_count
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167
self.width = _width()
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self.start_time = None
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self.last_update = None
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self.last_updates = deque()
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"""Return True if the bar was updated too recently"""
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if self.start_time is None:
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self.start_time = self.last_update = now
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interval = now - self.last_update
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if interval > 0 and interval < self.MIN_PAUSE:
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self.last_updates.append(now - self.last_update)
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self.last_update = now
126
194
def update(self, msg, current_cnt=None, total_cnt=None):
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195
"""Update and redraw progress bar."""
200
if current_cnt > total_cnt:
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total_cnt = current_cnt
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203
# save these for the tick() function
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204
self.last_msg = msg
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205
self.last_cnt = current_cnt
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206
self.last_total = total_cnt
137
if self.start_time is None:
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self.start_time = now
140
interval = now - self.last_update
141
if interval > 0 and interval < self.MIN_PAUSE:
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self.last_update = now
147
assert current_cnt <= total_cnt
149
assert current_cnt >= 0
151
211
if self.show_eta and self.start_time and total_cnt:
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eta = get_eta(self.start_time, current_cnt, total_cnt)
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eta = get_eta(self.start_time, current_cnt, total_cnt,
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last_updates = self.last_updates)
153
214
eta_str = " " + str_tdelta(eta)
229
def get_eta(start_time, current, total, enough_samples=3):
287
def get_eta(start_time, current, total, enough_samples=3, last_updates=None, n_recent=10):
230
288
if start_time is None:
249
307
assert total_duration >= elapsed
309
if last_updates and len(last_updates) >= n_recent:
310
while len(last_updates) > n_recent:
311
last_updates.popleft()
312
avg = sum(last_updates) / float(len(last_updates))
313
time_left = avg * (total - current)
315
old_time_left = total_duration - elapsed
317
# We could return the average, or some other value here
318
return (time_left + old_time_left) / 2
251
320
return total_duration - elapsed
265
from time import sleep
336
print 'dumb-terminal test:'
337
pb = DotsProgressBar()
339
pb.update('Leoparden', i, 99)
345
print 'smart-terminal test:'
266
346
pb = ProgressBar(show_pct=True, show_bar=True, show_spinner=False)
267
347
for i in range(100):
268
348
pb.update('Elephanten', i, 99)