pip install tqdm

from tqdm import tqdm
import time
for i in tqdm(range(50)):
    time.sleep(0.1)
    pass

from tqdm import tqdm
import time
d = {'loss':0.2,'learn':0.8}
for i in tqdm(range(50),desc='進行中',ncols=10,postfix=d): #desc設置名稱,ncols設置進度條長度.postfix以字典形式傳入詳細信息
    time.sleep(0.1)
    pass

from tqdm import tqdm
import time
bar = tqdm(['p1','p2','p3','p4','p5'])
for b in bar:
    time.sleep(0.5)
    bar.set_description("處理{0}中".format(b))

from tqdm import trange
import time
for i in trange(100):
    time.sleep(0.1)
    pass

from tqdm import tqdm
import time
#total參數(shù)設置進度條的總長度
with tqdm(total=100) as bar: # total表示預期的迭代次數(shù)
    for i in range(100): # 同上total值
        time.sleep(0.1)
        bar.update(1)  #每次更新進度條的長度

import tqdm
import time
for i in tqdm.tqdm(range(1000)):
    time.sleep(0.1)

from tqdm import tqdm
from time import sleep
text = ""
for char in tqdm(["a", "b", "c", "d"]):
    sleep(0.25)
    text = text + char

from time import sleep
from tqdm import trange
for i in trange(100):
    sleep(0.01)

pbar = tqdm(["a", "b", "c", "d"])
for char in pbar:
    sleep(0.25)
    pbar.set_description("Processing %s" % char)

Processing d: 100%|██████████| 4/4 [00:01<00:00,  3.99it/s]

with tqdm(total=100) as pbar:
    for i in range(10):
        sleep(0.1)
        pbar.update(10)

pbar = tqdm(total=100)
for i in range(10):
    sleep(0.1)
    pbar.update(10)
pbar.close()

time find . -name '*.py' -type f -exec cat \{} \; | wc -l

time find . -name '*.py' -type f -exec cat \{} \; | tqdm | wc -l

class tqdm():
  """
  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.
  """
  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):

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, optional
            The number of expected iterations. If unspecified,
            len(iterable) is used if possible. If float("inf") or as a last
            resort, only basic progress statistics are displayed
            (no ETA, no progressbar).
            If `gui` is True and this parameter needs subsequent updating,
            specify an initial arbitrary large positive integer,
            e.g. int(9e9).
        leave  : bool, optional
            If [default: True], keeps all traces of the progressbar
            upon termination of iteration.
        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, 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 or False, 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 or True, 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` 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, rate, rate_fmt, rate_noinv, rate_noinv_fmt,
              rate_inv, rate_inv_fmt, elapsed, elapsed_s, remaining,
              remaining_s, desc, postfix, unit.
            Note that a trailing ": " is automatically removed after {desc}
            if the latter is empty.
        initial  : int, optional
            The initial counter value. Useful when restarting a progress
            bar [default: 0].
        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` is True.
        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.
        gui  : bool, optional
            WARNING: internal parameter - do not use.
            Use tqdm_gui(...) instead. If set, will attempt to use
            matplotlib animations for a graphical output [default: False].