"""
Customisable progressbar decorator for iterators.
Includes a default `range` iterator printing to `stderr`.
Usage:
>>> from tqdm import trange, tqdm
>>> for i in trange(10):
... ... """ from __future__ import absolute_import, division
import sys from collections import OrderedDict, defaultdict from contextlib import contextmanager from datetime import datetime, timedelta from numbers import Number from time import time from warnings import warn from weakref import WeakSet
class TqdmDefaultWriteLock(object): """
Provide a default write lock for thread and multiprocessing safety.
Works only on platforms supporting `fork` (so Windows is excluded).
You must initialise a `tqdm` or `TqdmDefaultWriteLock` instance
before forking in order for the write lock to work.
On Windows, you need to supply the lock from the parent to the children as
an argument to joblib or the parallelism lib you use. """ # global thread lock so no setup required for multithreading. # NB: Do not create multiprocessing lock as it sets the multiprocessing # context, disallowing `spawn()`/`forkserver()`
th_lock = TRLock()
def __init__(self): # Create global parallelism locks to avoid racing issues with parallel # bars works only if fork available (Linux/MacOSX, but not Windows)
cls = type(self)
root_lock = cls.th_lock if root_lock isnotNone:
root_lock.acquire()
cls.create_mp_lock()
self.locks = [lk for lk in [cls.mp_lock, cls.th_lock] if lk isnotNone] if root_lock isnotNone:
root_lock.release()
def acquire(self, *a, **k): for lock in self.locks:
lock.acquire(*a, **k)
def release(self): for lock in self.locks[::-1]: # Release in inverse order of acquisition
lock.release()
res = charset[-1] * bar_length if bar_length < N_BARS: # whitespace padding
res = res + charset[frac_bar_length] + charset[0] * (N_BARS - bar_length - 1) return self.colour + res + self.COLOUR_RESET if self.colour else res
class EMA(object): """
Exponential moving average: smoothing to give progressively lower
weights to older values.
Parameters
----------
smoothing : float, optional
Smoothing factor in range [0, 1], [default: 0.3].
Increase to give more weight to recent values.
Ranges from 0 (yields old value) to 1 (yields new value). """ def __init__(self, smoothing=0.3):
self.alpha = smoothing
self.last = 0
self.calls = 0
def __call__(self, x=None): """
Parameters
----------
x : float
New value to include in EMA. """
beta = 1 - self.alpha if x isnotNone:
self.last = self.alpha * x + beta * self.last
self.calls += 1 return self.last / (1 - beta ** self.calls) if self.calls else self.last
class tqdm(Comparable): """
Decorate an iterable object, returning an iterator which acts exactly
like the original iterable, but prints a dynamically updating
progressbar every time a value is requested. """
monitor_interval = 10 # set to 0 to disable the thread
monitor = None
_instances = WeakSet()
@staticmethod def format_sizeof(num, suffix='', divisor=1000): """
Formats a number (greater than unity) with SI Order of Magnitude
prefixes.
Parameters
----------
num : float
Number ( >= 1) to format.
suffix : str, optional
Post-postfix [default: ''].
divisor : float, optional
Divisor between prefixes [default: 1000].
Returns
-------
out : str
Number with Order of Magnitude SI unit postfix. """ for unit in ['', 'k', 'M', 'G', 'T', 'P', 'E', 'Z']: if abs(num) < 999.5: if abs(num) < 99.95: if abs(num) < 9.995: return'{0:1.2f}'.format(num) + unit + suffix return'{0:2.1f}'.format(num) + unit + suffix return'{0:3.0f}'.format(num) + unit + suffix
num /= divisor return'{0:3.1f}Y'.format(num) + suffix
@staticmethod def format_interval(t): """
Formats a number of seconds as a clock time, [H:]MM:SS
Parameters
----------
t : int
Number of seconds.
Returns
-------
out : str
[H:]MM:SS """
mins, s = divmod(int(t), 60)
h, m = divmod(mins, 60) if h: return'{0:d}:{1:02d}:{2:02d}'.format(h, m, s) else: return'{0:02d}:{1:02d}'.format(m, s)
Parameters
----------
n : int or float or Numeric
A Number.
Returns
-------
out : str
Formatted number. """
f = '{0:.3g}'.format(n).replace('+0', '+').replace('-0', '-')
n = str(n) return f if len(f) < len(n) else n
@staticmethod def status_printer(file): """
Manage the printing and in-place updating of a line of characters.
Note that if the string is longer than a line, then in-place
updating may not work (it will print a new line at each refresh). """
fp = file
fp_flush = getattr(fp, 'flush', lambda: None) # pragma: no cover if fp in (sys.stderr, sys.stdout):
sys.stderr.flush()
sys.stdout.flush()
@staticmethod def format_meter(n, total, elapsed, ncols=None, prefix='', ascii=False, unit='it',
unit_scale=False, rate=None, bar_format=None, postfix=None,
unit_divisor=1000, initial=0, colour=None, **extra_kwargs): """ Return a string-based progress bar given some parameters
Parameters
----------
n : int or float
Number of finished iterations.
total : int or float
The expected total number of iterations. If meaningless (None),
only basic progress statistics are displayed (no ETA).
elapsed : float
Number of seconds passed since start.
ncols : int, optional
The width of the entire output message. If specified,
dynamically resizes `{bar}` to stay within this bound
[default: None]. If `0`, will not print any bar (only stats).
The fallback is `{bar:10}`.
prefix : str, optional
Prefix message (included in total width) [default: ''].
Use as {desc} in bar_format string.
ascii : bool, optional or str, optional Ifnot set, use unicode (smooth blocks) to fill the meter
[default: False]. The fallback is to use ASCII characters " 123456789#".
unit : str, optional
The iteration unit [default: 'it'].
unit_scale : bool or int or float, optional If 1 orTrue, the number of iterations will be printed with an
appropriate SI metric prefix (k = 10^3, M = 10^6, etc.)
[default: False]. If any other non-zero number, will scale
`total` and `n`.
rate : float, optional
Manual override for iteration rate. If [default: None], uses n/elapsed.
bar_format : str, optional
Specify a custom bar string formatting. May impact performance.
[default: '{l_bar}{bar}{r_bar}'], where
l_bar='{desc}: {percentage:3.0f}%|'and
r_bar='| {n_fmt}/{total_fmt} [{elapsed}<{remaining}, ' '{rate_fmt}{postfix}]'
Possible vars: l_bar, bar, r_bar, n, n_fmt, total, total_fmt,
percentage, elapsed, elapsed_s, ncols, nrows, desc, unit,
rate, rate_fmt, rate_noinv, rate_noinv_fmt,
rate_inv, rate_inv_fmt, postfix, unit_divisor,
remaining, remaining_s, eta.
Note that a trailing ": "is automatically removed after {desc} if the latter is empty.
postfix : *, optional
Similar to `prefix`, but placed at the end
(e.g. for additional stats).
Note: postfix is usually a string (not a dict) for this method, and will if possible be set to postfix = ', ' + postfix.
However other types are supported (#382).
unit_divisor : float, optional
[default: 1000], ignored unless `unit_scale` isTrue.
initial : int or float, optional
The initial counter value [default: 0].
colour : str, optional
Bar colour (e.g. 'green', '#00ff00').
Returns
-------
out : Formatted meter and stats, ready to display. """
# sanity check: total if total and n >= (total + 0.5): # allow float imprecision (#849)
total = None
# apply custom scale if necessary if unit_scale and unit_scale notin (True, 1): if total:
total *= unit_scale
n *= unit_scale if rate:
rate *= unit_scale # by default rate = self.avg_dn / self.avg_dt
unit_scale = False
elapsed_str = tqdm.format_interval(elapsed)
# if unspecified, attempt to use rate = average speed # (we allow manual override since predicting time is an arcane art) if rate isNoneand elapsed:
rate = (n - initial) / elapsed
inv_rate = 1 / rate if rate elseNone
format_sizeof = tqdm.format_sizeof
rate_noinv_fmt = ((format_sizeof(rate) if unit_scale else '{0:5.2f}'.format(rate)) if rate else'?') + unit + '/s'
rate_inv_fmt = (
(format_sizeof(inv_rate) if unit_scale else'{0:5.2f}'.format(inv_rate)) if inv_rate else'?') + 's/' + unit
rate_fmt = rate_inv_fmt if inv_rate and inv_rate > 1 else rate_noinv_fmt
if unit_scale:
n_fmt = format_sizeof(n, divisor=unit_divisor)
total_fmt = format_sizeof(total, divisor=unit_divisor) if total isnotNoneelse'?' else:
n_fmt = str(n)
total_fmt = str(total) if total isnotNoneelse'?'
remaining = (total - n) / rate if rate and total else 0
remaining_str = tqdm.format_interval(remaining) if rate else'?' try:
eta_dt = (datetime.now() + timedelta(seconds=remaining) if rate and total else datetime.utcfromtimestamp(0)) except OverflowError:
eta_dt = datetime.max
# format the stats displayed to the left and right sides of the bar if prefix: # old prefix setup work around
bool_prefix_colon_already = (prefix[-2:] == ": ")
l_bar = prefix if bool_prefix_colon_already else prefix + ": " else:
l_bar = ''
full_bar = FormatReplace() try:
nobar = bar_format.format(bar=full_bar, **format_dict) except UnicodeEncodeError:
bar_format = _unicode(bar_format)
nobar = bar_format.format(bar=full_bar, **format_dict) ifnot full_bar.format_called: # no {bar}, we can just format and return return nobar
# Formatting progress bar space available for bar's display
full_bar = Bar(frac,
max(1, ncols - disp_len(nobar)) if ncols else 10,
charset=Bar.ASCII if ascii isTrueelse ascii or Bar.UTF,
colour=colour) ifnot _is_ascii(full_bar.charset) and _is_ascii(bar_format):
bar_format = _unicode(bar_format)
res = bar_format.format(bar=full_bar, **format_dict) return disp_trim(res, ncols) if ncols else res
elif bar_format: # user-specified bar_format but no total
l_bar += '|'
format_dict.update(l_bar=l_bar, percentage=0)
full_bar = FormatReplace()
nobar = bar_format.format(bar=full_bar, **format_dict) ifnot full_bar.format_called: return nobar
full_bar = Bar(0,
max(1, ncols - disp_len(nobar)) if ncols else 10,
charset=Bar.BLANK, colour=colour)
res = bar_format.format(bar=full_bar, **format_dict) return disp_trim(res, ncols) if ncols else res else: # no total: no progressbar, ETA, just progress stats return'{0}{1}{2} [{3}, {4}{5}]'.format(
(prefix + ": ") if prefix else'', n_fmt, unit, elapsed_str, rate_fmt, postfix)
def __new__(cls, *_, **__):
instance = object.__new__(cls) with cls.get_lock(): # also constructs lock if non-existent
cls._instances.add(instance) # create monitoring thread if cls.monitor_interval and (cls.monitor isNone ornot cls.monitor.report()): try:
cls.monitor = TMonitor(cls, cls.monitor_interval) except Exception as e: # pragma: nocover
warn("tqdm:disabling monitor support" " (monitor_interval = 0) due to:\n" + str(e),
TqdmMonitorWarning, stacklevel=2)
cls.monitor_interval = 0 return instance
@classmethod def _get_free_pos(cls, instance=None): """Skips specified instance."""
positions = {abs(inst.pos) for inst in cls._instances if inst isnot instance and hasattr(inst, "pos")} return min(set(range(len(positions) + 1)).difference(positions))
@classmethod def _decr_instances(cls, instance): """
Remove from list and reposition another unfixed bar
to fill the new gap.
This means that by default (where all nested bars are unfixed),
order isnot maintained but screen flicker/blank space is minimised.
(tqdm<=4.44.1 moved ALL subsequent unfixed bars up.) """ with cls._lock: try:
cls._instances.remove(instance) except KeyError: # if not instance.gui: # pragma: no cover # raise pass# py2: maybe magically removed already # else: ifnot instance.gui:
last = (instance.nrows or 20) - 1 # find unfixed (`pos >= 0`) overflow (`pos >= nrows - 1`)
instances = list(filter( lambda i: hasattr(i, "pos") and last <= i.pos,
cls._instances)) # set first found to current `pos` if instances:
inst = min(instances, key=lambda i: i.pos)
inst.clear(nolock=True)
inst.pos = abs(instance.pos)
@classmethod def write(cls, s, file=None, end="\n", nolock=False): """Print a message via tqdm (without overlap with bars)."""
fp = file if file isnotNoneelse sys.stdout with cls.external_write_mode(file=file, nolock=nolock): # Write the message
fp.write(s)
fp.write(end)
@classmethod
@contextmanager def external_write_mode(cls, file=None, nolock=False): """
Disable tqdm within context and refresh tqdm when exits.
Useful when writing to standard output stream """
fp = file if file isnotNoneelse sys.stdout
try: ifnot nolock:
cls.get_lock().acquire() # Clear all bars
inst_cleared = [] for inst in getattr(cls, '_instances', []): # Clear instance if in the target output file # or if write output + tqdm output are both either # sys.stdout or sys.stderr (because both are mixed in terminal) if hasattr(inst, "start_t") and (inst.fp == fp or all(
f in (sys.stdout, sys.stderr) for f in (fp, inst.fp))):
inst.clear(nolock=True)
inst_cleared.append(inst) yield # Force refresh display of bars we cleared for inst in inst_cleared:
inst.refresh(nolock=True) finally: ifnot nolock:
cls._lock.release()
@classmethod def set_lock(cls, lock): """Set the global lock."""
cls._lock = lock
@classmethod def get_lock(cls): """Get the global lock. Construct it if it does not exist.""" ifnot hasattr(cls, '_lock'):
cls._lock = TqdmDefaultWriteLock() return cls._lock
@classmethod def pandas(cls, **tqdm_kwargs): """
Registers the current `tqdm` classwith
pandas.core.
( frame.DataFrame
| series.Series
| groupby.(generic.)DataFrameGroupBy
| groupby.(generic.)SeriesGroupBy
).progress_apply
A new instance will be create every time `progress_apply` is called, and each instance will automatically `close()` upon completion.
Parameters
----------
tqdm_kwargs : arguments for the tqdm instance
Examples
--------
>>> import pandas as pd
>>> import numpy as np
>>> from tqdm import tqdm
>>> from tqdm.gui import tqdm as tqdm_gui
>>>
>>> df = pd.DataFrame(np.random.randint(0, 100, (100000, 6)))
>>> tqdm.pandas(ncols=50) # can use tqdm_gui, optional kwargs, etc
>>> # Now you can use `progress_apply` instead of `apply`
>>> df.groupby(0).progress_apply(lambda x: x**2)
def inner_generator(df_function='apply'): def inner(df, func, *args, **kwargs): """
Parameters
----------
df : (DataFrame|Series)[GroupBy]
Data (may be grouped).
func : function
To be applied on the (grouped) data.
**kwargs : optional
Transmitted to `df.apply()`. """
# Precompute total iterations
total = tqdm_kwargs.pop("total", getattr(df, 'ngroups', None)) if total isNone: # not grouped if df_function == 'applymap':
total = df.size elif isinstance(df, Series):
total = len(df) elif (_Rolling_and_Expanding isNoneor not isinstance(df, _Rolling_and_Expanding)): # DataFrame or Panel
axis = kwargs.get('axis', 0) if axis == 'index':
axis = 0 elif axis == 'columns':
axis = 1 # when axis=0, total is shape[axis1]
total = df.size // df.shape[axis]
# Init bar if deprecated_t[0] isnotNone:
t = deprecated_t[0]
deprecated_t[0] = None else:
t = cls(total=total, **tqdm_kwargs)
if len(args) > 0: # *args intentionally not supported (see #244, #299)
TqdmDeprecationWarning( "Except func, normal arguments are intentionally" + " not supported by" + " `(DataFrame|Series|GroupBy).progress_apply`." + " Use keyword arguments instead.",
fp_write=getattr(t.fp, 'write', sys.stderr.write))
# Define bar updating wrapper def wrapper(*args, **kwargs): # update tbar correctly # it seems `pandas apply` calls `func` twice # on the first column/row to decide whether it can # take a fast or slow code path; so stop when t.total==t.n
t.update(n=1 ifnot t.total or t.n < t.total else 0) return func(*args, **kwargs)
# Apply the provided function (in **kwargs) # on the df using our wrapper (which provides bar updating) try: return getattr(df, df_function)(wrapper, **kwargs) finally:
t.close()
return inner
# Monkeypatch pandas to provide easy methods # Enable custom tqdm progress in pandas!
Series.progress_apply = inner_generator()
SeriesGroupBy.progress_apply = inner_generator()
Series.progress_map = inner_generator('map')
SeriesGroupBy.progress_map = inner_generator('map')
if Rolling isnotNoneand Expanding isnotNone:
Rolling.progress_apply = inner_generator()
Expanding.progress_apply = inner_generator() elif _Rolling_and_Expanding isnotNone:
_Rolling_and_Expanding.progress_apply = inner_generator()
def __init__(self, iterable=None, desc=None, total=None, leave=True, file=None,
ncols=None, mininterval=0.1, maxinterval=10.0, miniters=None,
ascii=None, disable=False, unit='it', unit_scale=False,
dynamic_ncols=False, smoothing=0.3, bar_format=None, initial=0,
position=None, postfix=None, unit_divisor=1000, write_bytes=None,
lock_args=None, nrows=None, colour=None, delay=0, gui=False,
**kwargs): """
Parameters
----------
iterable : iterable, optional
Iterable to decorate with a progressbar.
Leave blank to manually manage the updates.
desc : str, optional
Prefix for the progressbar.
total : int or float, optional
The number of expected iterations. If unspecified,
len(iterable) is used if possible. If float("inf") oras a last
resort, only basic progress statistics are displayed
(no ETA, no progressbar). If `gui` isTrueand this parameter needs subsequent updating,
specify an initial arbitrary large positive number,
e.g. 9e9.
leave : bool, optional If [default: True], keeps all traces of the progressbar
upon termination of iteration. If `None`, will leave only if `position` is `0`.
file : `io.TextIOWrapper` or `io.StringIO`, optional
Specifies where to output the progress messages
(default: sys.stderr). Uses `file.write(str)` and `file.flush()`
methods. For encoding, see `write_bytes`.
ncols : int, optional
The width of the entire output message. If specified,
dynamically resizes the progressbar to stay within this bound. If unspecified, attempts to use environment width. The
fallback is a meter width of 10 and no limit for the counter and
statistics. If 0, will not print any meter (only stats).
mininterval : float, optional
Minimum progress display update interval [default: 0.1] seconds.
maxinterval : float, optional
Maximum progress display update interval [default: 10] seconds.
Automatically adjusts `miniters` to correspond to `mininterval`
after long display update lag. Only works if `dynamic_miniters` or monitor thread is enabled.
miniters : int or float, optional
Minimum progress display update interval, in iterations. If 0 and `dynamic_miniters`, will automatically adjust to equal
`mininterval` (more CPU efficient, good for tight loops). If > 0, will skip display of specified number of iterations.
Tweak this and `mininterval` to get very efficient loops. If your progress is erratic with both fast and slow iterations
(network, skipping items, etc) you should set miniters=1.
ascii : bool or str, optional If unspecified orFalse, use unicode (smooth blocks) to fill
the meter. The fallback is to use ASCII characters " 123456789#".
disable : bool, optional
Whether to disable the entire progressbar wrapper
[default: False]. If set to None, disable on non-TTY.
unit : str, optional
String that will be used to define the unit of each iteration
[default: it].
unit_scale : bool or int or float, optional If 1 orTrue, the number of iterations will be reduced/scaled
automatically and a metric prefix following the
International System of Units standard will be added
(kilo, mega, etc.) [default: False]. If any other non-zero
number, will scale `total` and `n`.
dynamic_ncols : bool, optional If set, constantly alters `ncols` and `nrows` to the
environment (allowing for window resizes) [default: False].
smoothing : float, optional
Exponential moving average smoothing factor for speed estimates
(ignored in GUI mode). Ranges from 0 (average speed) to 1
(current/instantaneous speed) [default: 0.3].
bar_format : str, optional
Specify a custom bar string formatting. May impact performance.
[default: '{l_bar}{bar}{r_bar}'], where
l_bar='{desc}: {percentage:3.0f}%|'and
r_bar='| {n_fmt}/{total_fmt} [{elapsed}<{remaining}, ' '{rate_fmt}{postfix}]'
Possible vars: l_bar, bar, r_bar, n, n_fmt, total, total_fmt,
percentage, elapsed, elapsed_s, ncols, nrows, desc, unit,
rate, rate_fmt, rate_noinv, rate_noinv_fmt,
rate_inv, rate_inv_fmt, postfix, unit_divisor,
remaining, remaining_s, eta.
Note that a trailing ": "is automatically removed after {desc} if the latter is empty.
initial : int or float, optional
The initial counter value. Useful when restarting a progress
bar [default: 0]. If using float, consider specifying `{n:.3f}` or similar in `bar_format`, or specifying `unit_scale`.
position : int, optional
Specify the line offset to print this bar (starting from 0)
Automatic if unspecified.
Useful to manage multiple bars at once (eg, from threads).
postfix : dict or *, optional
Specify additional stats to display at the end of the bar.
Calls `set_postfix(**postfix)` if possible (dict).
unit_divisor : float, optional
[default: 1000], ignored unless `unit_scale` isTrue.
write_bytes : bool, optional If (default: None) and `file` is unspecified,
bytes will be written in Python 2. If `True` will also write
bytes. In all other cases will default to unicode.
lock_args : tuple, optional
Passed to `refresh` for intermediate output
(initialisation, iterating, and updating).
nrows : int, optional
The screen height. If specified, hides nested bars outside this
bound. If unspecified, attempts to use environment height.
The fallback is 20.
colour : str, optional
Bar colour (e.g. 'green', '#00ff00').
delay : float, optional
Don't display until [default: 0] seconds have elapsed.
gui : bool, optional
WARNING: internal parameter - do not use.
Use tqdm.gui.tqdm(...) instead. If set, will attempt to use
matplotlib animations for a graphical output [default: False].
Returns
-------
out : decorated iterator. """ if write_bytes isNone:
write_bytes = file isNoneand sys.version_info < (3,)
if file isNone:
file = sys.stderr
if write_bytes: # Despite coercing unicode into bytes, py2 sys.std* streams # should have bytes written to them.
file = SimpleTextIOWrapper(
file, encoding=getattr(file, 'encoding', None) or'utf-8')
if disable isNoneand hasattr(file, "isatty") andnot file.isatty():
disable = True
if total isNoneand iterable isnotNone: try:
total = len(iterable) except (TypeError, AttributeError):
total = None if total == float("inf"): # Infinite iterations, behave same as unknown
total = None
if disable:
self.iterable = iterable
self.disable = disable with self._lock:
self.pos = self._get_free_pos(self)
self._instances.remove(self)
self.n = initial
self.total = total
self.leave = leave return
if kwargs:
self.disable = True with self._lock:
self.pos = self._get_free_pos(self)
self._instances.remove(self) raise (
TqdmDeprecationWarning( "`nested` is deprecated and automated.\n" "Use `position` instead for manual control.\n",
fp_write=getattr(file, 'write', sys.stderr.write)) if"nested"in kwargs else
TqdmKeyError("Unknown argument(s): " + str(kwargs)))
# Preprocess the arguments if (
(ncols isNoneor nrows isNone) and (file in (sys.stderr, sys.stdout))
) or dynamic_ncols: # pragma: no cover if dynamic_ncols:
dynamic_ncols = _screen_shape_wrapper() if dynamic_ncols:
ncols, nrows = dynamic_ncols(file) else:
_dynamic_ncols = _screen_shape_wrapper() if _dynamic_ncols:
_ncols, _nrows = _dynamic_ncols(file) if ncols isNone:
ncols = _ncols if nrows isNone:
nrows = _nrows
if ascii isNone:
ascii = not _supports_unicode(file)
if bar_format and ascii isnotTrueandnot _is_ascii(ascii): # Convert bar format into unicode since terminal uses unicode
bar_format = _unicode(bar_format)
# if nested, at initial sp() call we replace '\r' by '\n' to # not overwrite the outer progress bar with self._lock: # mark fixed positions as negative
self.pos = self._get_free_pos(self) if position isNoneelse -position
ifnot gui: # Initialize the screen printer
self.sp = self.status_printer(self.fp) if delay <= 0:
self.refresh(lock_args=self.lock_args)
# Init the time counter
self.last_print_t = self._time() # NB: Avoid race conditions by setting start_t at the very end of init
self.start_t = self.last_print_t
def __bool__(self): if self.total isnotNone: return self.total > 0 if self.iterable isNone: raise TypeError('bool() undefined when iterable == total == None') return bool(self.iterable)
def __nonzero__(self): return self.__bool__()
def __len__(self): return (
self.total if self.iterable isNone else self.iterable.shape[0] if hasattr(self.iterable, "shape") else len(self.iterable) if hasattr(self.iterable, "__len__") else self.iterable.__length_hint__() if hasattr(self.iterable, "__length_hint__") else getattr(self, "total", None))
# If the bar is disabled, then just walk the iterable # (note: keep this check outside the loop for performance) if self.disable: for obj in iterable: yield obj return
mininterval = self.mininterval
last_print_t = self.last_print_t
last_print_n = self.last_print_n
min_start_t = self.start_t + self.delay
n = self.n
time = self._time
try: for obj in iterable: yield obj # Update and possibly print the progressbar. # Note: does not call self.update(1) for speed optimisation.
n += 1
if n - last_print_n >= self.miniters:
cur_t = time()
dt = cur_t - last_print_t if dt >= mininterval and cur_t >= min_start_t:
self.update(n - last_print_n)
last_print_n = self.last_print_n
last_print_t = self.last_print_t finally:
self.n = n
self.close()
def update(self, n=1): """
Manually update the progress bar, useful for streams
such as reading files.
E.g.:
>>> t = tqdm(total=filesize) # Initialise
>>> for current_buffer in stream:
... ...
... t.update(len(current_buffer))
>>> t.close()
The last line is highly recommended, but possibly not necessary if
`t.update()` will be called in such a way that `filesize` will be
exactly reached and printed.
Parameters
----------
n : int or float, optional
Increment to add to the internal counter of iterations
[default: 1]. If using float, consider specifying `{n:.3f}` or similar in `bar_format`, or specifying `unit_scale`.
Returns
-------
out : bool orNone Trueif a `display()` was triggered. """ if self.disable: return
if n < 0:
self.last_print_n += n # for auto-refresh logic to work
self.n += n
# check counter first to reduce calls to time() if self.n - self.last_print_n >= self.miniters:
cur_t = self._time()
dt = cur_t - self.last_print_t if dt >= self.mininterval and cur_t >= self.start_t + self.delay:
cur_t = self._time()
dn = self.n - self.last_print_n # >= n if self.smoothing and dt and dn: # EMA (not just overall average)
self._ema_dn(dn)
self._ema_dt(dt)
self.refresh(lock_args=self.lock_args) if self.dynamic_miniters: # If no `miniters` was specified, adjust automatically to the # maximum iteration rate seen so far between two prints. # e.g.: After running `tqdm.update(5)`, subsequent # calls to `tqdm.update()` will only cause an update after # at least 5 more iterations. if self.maxinterval and dt >= self.maxinterval:
self.miniters = dn * (self.mininterval or self.maxinterval) / dt elif self.smoothing: # EMA miniters update
self.miniters = self._ema_miniters(
dn * (self.mininterval / dt if self.mininterval and dt else 1)) else: # max iters between two prints
self.miniters = max(self.miniters, dn)
# Store old values for next call
self.last_print_n = self.n
self.last_print_t = cur_t returnTrue
def close(self): """Cleanup and (if leave=False) close the progressbar.""" if self.disable: return
# Prevent multiple closures
self.disable = True
# decrement instance pos and remove from internal set
pos = abs(self.pos)
self._decr_instances(self)
if self.last_print_t < self.start_t + self.delay: # haven't ever displayed; nothing to clear return
# GUI mode if getattr(self, 'sp', None) isNone: return
# annoyingly, _supports_unicode isn't good enough def fp_write(s):
self.fp.write(_unicode(s))
try:
fp_write('') except ValueError as e: if'closed'in str(e): return raise# pragma: no cover
leave = pos == 0 if self.leave isNoneelse self.leave
with self._lock: if leave: # stats for overall rate (no weighted average)
self._ema_dt = lambda: None
self.display(pos=0)
fp_write('\n') else: # clear previous display if self.display(msg='', pos=pos) andnot pos:
fp_write('\r')
def clear(self, nolock=False): """Clear current bar display.""" if self.disable: return
ifnot nolock:
self._lock.acquire()
pos = abs(self.pos) if pos < (self.nrows or 20):
self.moveto(pos)
self.sp('')
self.fp.write('\r') # place cursor back at the beginning of line
self.moveto(-pos) ifnot nolock:
self._lock.release()
def refresh(self, nolock=False, lock_args=None): """
Force refresh the display of this bar.
Parameters
----------
nolock : bool, optional If `True`, does not lock. If [default: `False`]: calls `acquire()` on internal lock.
lock_args : tuple, optional
Passed to internal lock's `acquire()`. If specified, will only `display()` if `acquire()` returns `True`. """ if self.disable: return
def unpause(self): """Restart tqdm timer from last print time.""" if self.disable: return
cur_t = self._time()
self.start_t += cur_t - self.last_print_t
self.last_print_t = cur_t
def reset(self, total=None): """
Resets to 0 iterations for repeated use.
Consider combining with `leave=True`.
Parameters
----------
total : int or float, optional. Total to use for the new bar. """
self.n = 0 if total isnotNone:
self.total = total if self.disable: return
self.last_print_n = 0
self.last_print_t = self.start_t = self._time()
self._ema_dn = EMA(self.smoothing)
self._ema_dt = EMA(self.smoothing)
self._ema_miniters = EMA(self.smoothing)
self.refresh()
def set_description(self, desc=None, refresh=True): """
Set/modify description of the progress bar.
def set_description_str(self, desc=None, refresh=True): """Set/modify description without ': ' appended."""
self.desc = desc or'' if refresh:
self.refresh()
def set_postfix(self, ordered_dict=None, refresh=True, **kwargs): """
Set/modify postfix (additional stats) with automatic formatting based on datatype.
Parameters
----------
ordered_dict : dict or OrderedDict, optional
refresh : bool, optional
Forces refresh [default: True].
kwargs : dict, optional """ # Sort in alphabetical order to be more deterministic
postfix = OrderedDict([] if ordered_dict isNoneelse ordered_dict) for key in sorted(kwargs.keys()):
postfix[key] = kwargs[key] # Preprocess stats according to datatype for key in postfix.keys(): # Number: limit the length of the string if isinstance(postfix[key], Number):
postfix[key] = self.format_num(postfix[key]) # Else for any other type, try to get the string conversion elifnot isinstance(postfix[key], _basestring):
postfix[key] = str(postfix[key]) # Else if it's a string, don't need to preprocess anything # Stitch together to get the final postfix
self.postfix = ', '.join(key + '=' + postfix[key].strip() for key in postfix.keys()) if refresh:
self.refresh()
def set_postfix_str(self, s='', refresh=True): """
Postfix without dictionary expansion, similar to prefix handling. """
self.postfix = str(s) if refresh:
self.refresh()
def display(self, msg=None, pos=None): """
Use `self.sp` to display `msg` in the specified `pos`.
Consider overloading this function when inheriting to use e.g.:
`self.some_frontend(**self.format_dict)` instead of `self.sp`.
Parameters
----------
msg : str, optional. What to display (default: `repr(self)`).
pos : int, optional. Position to `moveto`
(default: `abs(self.pos)`). """ if pos isNone:
pos = abs(self.pos)
nrows = self.nrows or 20 if pos >= nrows - 1: if pos >= nrows: returnFalse if msg or msg isNone: # override at `nrows - 1`
msg = " ... (more hidden) ..."
ifnot hasattr(self, "sp"): raise TqdmDeprecationWarning( "Please use `tqdm.gui.tqdm(...)`" " instead of `tqdm(..., gui=True)`\n",
fp_write=getattr(self.fp, 'write', sys.stderr.write))
if pos:
self.moveto(pos)
self.sp(self.__str__() if msg isNoneelse msg) if pos:
self.moveto(-pos) returnTrue
@classmethod
@contextmanager def wrapattr(cls, stream, method, total=None, bytes=True, **tqdm_kwargs): """
stream : file-like object.
method : str, "read"or"write". The result of `read()` and
the first argument of `write()` should have a `len()`.
>>> with tqdm.wrapattr(file_obj, "read", total=file_obj.size) as fobj:
... whileTrue:
... chunk = fobj.read(chunk_size)
... ifnot chunk:
... break """ with cls(total=total, **tqdm_kwargs) as t: if bytes:
t.unit = "B"
t.unit_scale = True
t.unit_divisor = 1024 yield CallbackIOWrapper(t.update, stream, method)
def trange(*args, **kwargs): """
A shortcut for tqdm(xrange(*args), **kwargs).
On Python3+ range is used instead of xrange. """ return tqdm(_range(*args), **kwargs)
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