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26
not to clutter log files.
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# TODO: remove functions in favour of keeping everything in one class
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31
# TODO: should be a global option e.g. --silent that disables progress
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# indicators, preferably without needing to adjust all code that
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33
# potentially calls them.
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# TODO: If not on a tty perhaps just print '......' for the benefit of IDEs, etc
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# TODO: Optionally show elapsed time instead/as well as ETA; nicer
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# when the rate is unpredictable
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# TODO: Perhaps don't write updates faster than a certain rate, say
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TODO: Is there anything that gets a better update when the window
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49
is resized while the program is running?
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return int(os.environ['COLUMNS'])
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54
except (IndexError, KeyError, ValueError):
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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
104
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):
116
def __init__(self, **kwargs):
117
_BaseProgressBar.__init__(self, **kwargs)
124
def update(self, msg=None, current_cnt=None, total_cnt=None):
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if msg and msg != self.last_msg:
127
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):
71
class ProgressBar(object):
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72
"""Progress bar display object.
142
74
Several options are available to control the display. These can
159
91
SPIN_CHARS = r'/-\|'
160
92
MIN_PAUSE = 0.1 # seconds
163
def __init__(self, **kwargs):
164
_BaseProgressBar.__init__(self, **kwargs)
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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107
self.spin_pos = 0
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self.width = _width()
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self.start_time = None
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self.last_update = None
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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
179
if interval > 0 and interval < self.MIN_PAUSE:
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self.last_update = now
111
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
115
self.show_bar = show_bar
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self.show_count = show_count
187
120
self.update(self.last_msg, self.last_cnt, self.last_total)
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124
def update(self, msg, current_cnt=None, total_cnt=None):
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125
"""Update and redraw progress bar."""
194
129
# save these for the tick() function
195
130
self.last_msg = msg
196
131
self.last_cnt = current_cnt
197
132
self.last_total = total_cnt
135
if self.start_time is None:
136
self.start_time = now
138
interval = now - self.last_update
139
if interval > 0 and interval < self.MIN_PAUSE:
142
self.last_update = now
203
147
assert current_cnt <= total_cnt
239
183
if self.show_bar:
240
184
# progress bar, if present, soaks up all remaining space
241
cols = self.width - 1 - len(msg) - len(spin_str) - len(pct_str) \
185
cols = width - 1 - len(msg) - len(spin_str) - len(pct_str) \
242
186
- len(eta_str) - len(count_str) - 3
260
204
m = spin_str + bar_str + msg + count_str + pct_str + eta_str
262
assert len(m) < self.width
263
self.to_file.write('\r' + m.ljust(self.width - 1))
206
assert len(m) < width
207
self.to_file.write('\r' + m.ljust(width - 1))
264
208
#self.to_file.flush()
268
self.to_file.write('\r%s\r' % (' ' * (self.width - 1)))
215
self.to_file.write('\r%s\r' % (' ' * (_width() - 1)))
269
216
#self.to_file.flush()
320
print 'dumb-terminal test:'
321
pb = DotsProgressBar()
323
pb.update('Leoparden', i, 99)
329
print 'smart-terminal test:'
265
from time import sleep
330
266
pb = ProgressBar(show_pct=True, show_bar=True, show_spinner=False)
331
267
for i in range(100):
332
268
pb.update('Elephanten', i, 99)