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| Original file line number | Diff line number | Diff line change |
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| # Copyright (c) 2012 Georgios Verigakis <verigak@gmail.com> | ||
| # | ||
| # Permission to use, copy, modify, and distribute this software for any | ||
| # purpose with or without fee is hereby granted, provided that the above | ||
| # copyright notice and this permission notice appear in all copies. | ||
| # | ||
| # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | ||
| # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | ||
| # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | ||
| # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | ||
| # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | ||
| # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | ||
| # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | ||
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| from sys import stderr | ||
| from collections import deque | ||
| try: | ||
| from time import monotonic | ||
| except ImportError: | ||
| from time import time as monotonic | ||
|
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|
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| HIDE_CURSOR = '\x1b[?25l' | ||
| SHOW_CURSOR = '\x1b[?25h' | ||
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| class Infinite(object): | ||
| file = stderr | ||
| sma_window = 10 # Simple Moving Average window | ||
| check_tty = True | ||
| hide_cursor = True | ||
|
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| def __init__(self, message='', **kwargs): | ||
| self.index = 0 | ||
| self.start_ts = monotonic() | ||
| self.avg = 0 | ||
| self._avg_update_ts = self.start_ts | ||
| self._ts = self.start_ts | ||
| self._xput = deque(maxlen=self.sma_window) | ||
| for key, val in kwargs.items(): | ||
| setattr(self, key, val) | ||
|
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| self._max_width = 0 | ||
| self._hidden_cursor = False | ||
| self.message = message | ||
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| if self.file and self.is_tty(): | ||
| if self.hide_cursor: | ||
| print(HIDE_CURSOR, end='', file=self.file) | ||
| self._hidden_cursor = True | ||
| self.writeln('') | ||
|
|
||
| def __del__(self): | ||
| if self._hidden_cursor: | ||
| print(SHOW_CURSOR, end='', file=self.file) | ||
|
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| def __getitem__(self, key): | ||
| if key.startswith('_'): | ||
| return None | ||
| return getattr(self, key, None) | ||
|
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| @property | ||
| def elapsed(self): | ||
| return int(monotonic() - self.start_ts) | ||
|
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| @property | ||
| def elapsed_td(self): | ||
| return timedelta(seconds=self.elapsed) | ||
|
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| def update_avg(self, n, dt): | ||
| if n > 0: | ||
| xput_len = len(self._xput) | ||
| self._xput.append(dt / n) | ||
| now = monotonic() | ||
| # update when we're still filling _xput, then after every second | ||
| if (xput_len < self.sma_window or | ||
| now - self._avg_update_ts > 1): | ||
| self.avg = sum(self._xput) / len(self._xput) | ||
| self._avg_update_ts = now | ||
|
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| def update(self): | ||
| pass | ||
|
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| def start(self): | ||
| pass | ||
|
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| def writeln(self, line): | ||
| if self.file and self.is_tty(): | ||
| width = len(line) | ||
| if width < self._max_width: | ||
| # Add padding to cover previous contents | ||
| line += ' ' * (self._max_width - width) | ||
| else: | ||
| self._max_width = width | ||
| print('\r' + line, end='', file=self.file) | ||
| self.file.flush() | ||
|
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| def finish(self): | ||
| if self.file and self.is_tty(): | ||
| print(file=self.file) | ||
| if self._hidden_cursor: | ||
| print(SHOW_CURSOR, end='', file=self.file) | ||
| self._hidden_cursor = False | ||
|
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| def is_tty(self): | ||
| try: | ||
| return self.file.isatty() if self.check_tty else True | ||
| except AttributeError: | ||
| msg = "%s has no attribute 'isatty'. Try setting check_tty=False." % self | ||
| raise AttributeError(msg) | ||
|
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| def next(self, n=1): | ||
| now = monotonic() | ||
| dt = now - self._ts | ||
| self.update_avg(n, dt) | ||
| self._ts = now | ||
| self.index = self.index + n | ||
| self.update() | ||
|
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| def iter(self, it): | ||
| self.iter_value = None | ||
| with self: | ||
| for x in it: | ||
| self.iter_value = x | ||
| yield x | ||
| self.next() | ||
| del self.iter_value | ||
|
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| def __enter__(self): | ||
| self.start() | ||
| return self | ||
|
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| def __exit__(self, exc_type, exc_val, exc_tb): | ||
| self.finish() | ||
|
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| class LineSpinner(Infinite): | ||
| phases = ['⎺', '⎻', '⎼', '⎽', '⎼', '⎻'] | ||
| hide_cursor = False | ||
|
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| def update(self): | ||
| i = self.index % len(self.phases) | ||
| message = self.message % self | ||
| line = ''.join([message, self.phases[i]]) | ||
| self.writeln(line) |