Question

有没有办法做到以下几点？

我写了一个简单的控制台应用程序，使用ftplib从FTP服务器上传和下载文件。

每次下载一些数据块时，我都希望更新文本进度条，即使它只是一个数字。

但我不想删除所有打印到控制台的文本。（执行“清除”然后打印更新的百分比。）

Answer 1

以下是我经常使用的以下许多答案的汇总。注意：这适用于Python 3;有关在Python 2中使用它的详细信息，请参阅注释。

# Print iterations progress
def printProgressBar (iteration, total, prefix = '', suffix = '', decimals = 1, length = 100, fill = '█'):
    """
    Call in a loop to create terminal progress bar
    @params:
        iteration   - Required  : current iteration (Int)
        total       - Required  : total iterations (Int)
        prefix      - Optional  : prefix string (Str)
        suffix      - Optional  : suffix string (Str)
        decimals    - Optional  : positive number of decimals in percent complete (Int)
        length      - Optional  : character length of bar (Int)
        fill        - Optional  : bar fill character (Str)
    """
    percent = ("{0:." + str(decimals) + "f}").format(100 * (iteration / float(total)))
    filledLength = int(length * iteration // total)
    bar = fill * filledLength + '-' * (length - filledLength)
    print('\r%s |%s| %s%% %s' % (prefix, bar, percent, suffix), end = '\r')
    # Print New Line on Complete
    if iteration == total: 
        print()

样本用法：

from time import sleep

# A List of Items
items = list(range(0, 57))
l = len(items)

# Initial call to print 0% progress
printProgressBar(0, l, prefix = 'Progress:', suffix = 'Complete', length = 50)
for i, item in enumerate(items):
    # Do stuff...
    sleep(0.1)
    # Update Progress Bar
    printProgressBar(i + 1, l, prefix = 'Progress:', suffix = 'Complete', length = 50)

示例输出：

Progress: |█████████████████████████████████████████████-----| 90.0% Complete

Answer 2

写'\ r'会将光标移回到行的开头。

显示百分比计数器：

import time
import sys

for i in range(100):
    time.sleep(1)
    sys.stdout.write("\r%d%%" % i)
    sys.stdout.flush()

Answer 3

tqdm: add a progress meter to your loops in a second：

>>> import time
>>> from tqdm import tqdm
>>> for i in tqdm(range(100)):
...     time.sleep(1)
... 
|###-------| 35/100  35% [elapsed: 00:35 left: 01:05,  1.00 iters/sec]

Answer 4

将\r写入控制台。这是"carriage return"，导致其后的所有文本在行的开头回显。类似的东西：

def update_progress(progress):
    print '\r[{0}] {1}%'.format('#'*(progress/10), progress)

会给你一些类似的东西：[ ########## ] 100%

Answer 5

不到10行代码。

这里的要点：https://gist.github.com/vladignatyev/06860ec2040cb497f0f3

import sys


def progress(count, total, suffix=''):
    bar_len = 60
    filled_len = int(round(bar_len * count / float(total)))

    percents = round(100.0 * count / float(total), 1)
    bar = '=' * filled_len + '-' * (bar_len - filled_len)

    sys.stdout.write('[%s] %s%s ...%s\r' % (bar, percents, '%', suffix))
    sys.stdout.flush()  # As suggested by Rom Ruben

enter image description here

Answer 6

尝试使用由Mozart of Python编写的click库，Armin Ronacher。

$ pip install click # both 2 and 3 compatible

创建一个简单的进度条：

import click

with click.progressbar(range(1000000)) as bar:
    for i in bar:
        pass

这就是它的样子：

# [###-------------------------------]    9%  00:01:14

根据您的内容自定义：

import click, sys

with click.progressbar(range(100000), file=sys.stderr, show_pos=True, width=70, bar_template='(_(_)=%(bar)sD(_(_| %(info)s', fill_char='=', empty_char=' ') as bar:
    for i in bar:
        pass

自定义外观：

(_(_)===================================D(_(_| 100000/100000 00:00:02

还有更多选项，请参阅API docs：

 click.progressbar(iterable=None, length=None, label=None, show_eta=True, show_percent=None, show_pos=False, item_show_func=None, fill_char='#', empty_char='-', bar_template='%(label)s [%(bar)s] %(info)s', info_sep=' ', width=36, file=None, color=None)

Answer 7

我意识到我已经迟到了，但是这里有一个我写的稍微Yum风格（Red Hat）（这里不是100％准确，但如果你使用进度条达到那个准确度的水平，无论如何你都错了）：

import sys

def cli_progress_test(end_val, bar_length=20):
    for i in xrange(0, end_val):
        percent = float(i) / end_val
        hashes = '#' * int(round(percent * bar_length))
        spaces = ' ' * (bar_length - len(hashes))
        sys.stdout.write("\rPercent: [{0}] {1}%".format(hashes + spaces, int(round(percent * 100))))
        sys.stdout.flush()

应该产生这样的东西：

Percent: [##############      ] 69%

......括号保持静止且只有散列增加。

这可能更适合作为装饰者。另一天......

Answer 8

检查此库：clint

它有很多功能，包括进度条：

from time import sleep  
from random import random  
from clint.textui import progress  
if __name__ == '__main__':
    for i in progress.bar(range(100)):
        sleep(random() * 0.2)

    for i in progress.dots(range(100)):
        sleep(random() * 0.2)

此link可快速概述其功能

Answer 9

~~以下是用Python编写的进度条的一个很好的例子：http://nadiana.com/animated-terminal-progress-bar-in-python~~

但是如果你想自己写的话。您可以使用curses模块来简化操作：）

[编辑] 也许更容易的不是诅咒这个词。但是如果你想创造一个完整的cui而不是诅咒为你照顾很多东西。

[编辑] 由于旧的链接已经死了，我已经提出了我自己的Python Progressbar版本，请在此处获取：https://github.com/WoLpH/python-progressbar

Answer 10

import time,sys

for i in range(100+1):
    time.sleep(0.1)
    sys.stdout.write(('='*i)+(''*(100-i))+("\r [ %d"%i+"% ] "))
    sys.stdout.flush()

输出

[29％] ===================

Answer 11

并且，只是为了添加到堆中，这是一个可以使用的对象

import sys

class ProgressBar(object):
    DEFAULT_BAR_LENGTH = 65
    DEFAULT_CHAR_ON  = '='
    DEFAULT_CHAR_OFF = ' '

    def __init__(self, end, start=0):
        self.end    = end
        self.start  = start
        self._barLength = self.__class__.DEFAULT_BAR_LENGTH

        self.setLevel(self.start)
        self._plotted = False

    def setLevel(self, level):
        self._level = level
        if level < self.start:  self._level = self.start
        if level > self.end:    self._level = self.end

        self._ratio = float(self._level - self.start) / float(self.end - self.start)
        self._levelChars = int(self._ratio * self._barLength)

    def plotProgress(self):
        sys.stdout.write("\r  %3i%% [%s%s]" %(
            int(self._ratio * 100.0),
            self.__class__.DEFAULT_CHAR_ON  * int(self._levelChars),
            self.__class__.DEFAULT_CHAR_OFF * int(self._barLength - self._levelChars),
        ))
        sys.stdout.flush()
        self._plotted = True

    def setAndPlot(self, level):
        oldChars = self._levelChars
        self.setLevel(level)
        if (not self._plotted) or (oldChars != self._levelChars):
            self.plotProgress()

    def __add__(self, other):
        assert type(other) in [float, int], "can only add a number"
        self.setAndPlot(self._level + other)
        return self
    def __sub__(self, other):
        return self.__add__(-other)
    def __iadd__(self, other):
        return self.__add__(other)
    def __isub__(self, other):
        return self.__add__(-other)

    def __del__(self):
        sys.stdout.write("\n")

if __name__ == "__main__":
    import time
    count = 150
    print "starting things:"

    pb = ProgressBar(count)

    #pb.plotProgress()
    for i in range(0, count):
        pb += 1
        #pb.setAndPlot(i + 1)
        time.sleep(0.01)
    del pb

    print "done"

结果：

starting things:
  100% [=================================================================]
done

这通常被认为是“超过顶部”，但是当你大量使用它时它很方便

Answer 12

安装tqdm。（pip install tqdm）并按如下方式使用：

import time
from tqdm import tqdm
for i in tqdm(range(1000)):
    time.sleep(0.01)

这是一个10秒的进度条，它会输出如下内容：

47%|██████████████████▊                     | 470/1000 [00:04<00:05, 98.61it/s]

Answer 13

在Python命令行运行此（在任何IDE或开发环境中不）：

>>> import threading
>>> for i in range(50+1):
...   threading._sleep(0.5)
...   print "\r%3d" % i, ('='*i)+('-'*(50-i)),

在我的Windows系统上正常运行。

Answer 14

我正在使用progress from reddit。我喜欢它，因为它可以打印一行中每个项目的进度，并且不应该从程序中删除打印输出。

编辑：固定链接

Answer 15

http://code.activestate.com/recipes/168639-progress-bar-class/（2002）
http://code.activestate.com/recipes/299207-console-text-progress-indicator-class/（2004）
http://pypi.python.org/pypi/progressbar（2006）

许多教程都在等待用Google搜索。

Answer 16

基于上述答案和关于CLI进度条的其他类似问题，我想我得到了所有这些问题的一般共同答案。请在https://stackoverflow.com/a/15860757/2254146

处查看

总之，代码是这样的：

import time, sys

# update_progress() : Displays or updates a console progress bar
## Accepts a float between 0 and 1. Any int will be converted to a float.
## A value under 0 represents a 'halt'.
## A value at 1 or bigger represents 100%
def update_progress(progress):
    barLength = 10 # Modify this to change the length of the progress bar
    status = ""
    if isinstance(progress, int):
        progress = float(progress)
    if not isinstance(progress, float):
        progress = 0
        status = "error: progress var must be float\r\n"
    if progress < 0:
        progress = 0
        status = "Halt...\r\n"
    if progress >= 1:
        progress = 1
        status = "Done...\r\n"
    block = int(round(barLength*progress))
    text = "\rPercent: [{0}] {1}% {2}".format( "#"*block + "-"*(barLength-block), progress*100, status)
    sys.stdout.write(text)
    sys.stdout.flush()

看起来像

百分比：[##########] 99.0％

Answer 17

尝试安装此软件包：pip install progressbar2：

import time
import progressbar

for i in progressbar.progressbar(range(100)):
    time.sleep(0.02)

progresssbar github：https://github.com/WoLpH/python-progressbar

Answer 18

我建议使用tqdm - https://pypi.python.org/pypi/tqdm - 这样可以很容易地将任何可迭代或进程转换为进度条，并处理所有需要终端的混乱。

从文档中：“tqdm可以轻松支持回调/挂钩和手动更新。以下是urllib的示例”

import urllib
from tqdm import tqdm

def my_hook(t):
  """
  Wraps tqdm instance. Don't forget to close() or __exit__()
  the tqdm instance once you're done with it (easiest using `with` syntax).

  Example
  -------

  >>> with tqdm(...) as t:
  ...     reporthook = my_hook(t)
  ...     urllib.urlretrieve(..., reporthook=reporthook)

  """
  last_b = [0]

  def inner(b=1, bsize=1, tsize=None):
    """
    b  : int, optional
        Number of blocks just transferred [default: 1].
    bsize  : int, optional
        Size of each block (in tqdm units) [default: 1].
    tsize  : int, optional
        Total size (in tqdm units). If [default: None] remains unchanged.
    """
    if tsize is not None:
        t.total = tsize
    t.update((b - last_b[0]) * bsize)
    last_b[0] = b
  return inner

eg_link = 'http://www.doc.ic.ac.uk/~cod11/matryoshka.zip'
with tqdm(unit='B', unit_scale=True, miniters=1,
          desc=eg_link.split('/')[-1]) as t:  # all optional kwargs
    urllib.urlretrieve(eg_link, filename='/dev/null',
                       reporthook=my_hook(t), data=None)

Answer 19

一个非常简单的解决方案是将此代码放入循环中：

将它放在文件的正文中（即顶部）：

import sys

将它放在循环体中：

sys.stdout.write("-") # prints a dash for each iteration of loop
sys.stdout.flush() # ensures bar is displayed incrementally

Answer 20

大声笑，我刚刚为此写了一篇文章继承人代码请记住，你不能使用unicode做阻止ascii我使用cp437

import os
import time
def load(left_side, right_side, length, time):
    x = 0
    y = ""
    print "\r"
    while x < length:
        space = length - len(y)
        space = " " * space
        z = left + y + space + right
        print "\r", z,
        y += "█"
        time.sleep(time)
        x += 1
    cls()

你就这么称呼它

print "loading something awesome"
load("|", "|", 10, .01)

所以它看起来像这样

loading something awesome
|█████     |

Answer 21

import sys
def progresssbar():
         for i in range(100):
            time.sleep(1)
            sys.stdout.write("%i\r" % i)

progressbar()

注意：如果您在交互式解释器中运行此功能，则会打印出额外的数字

Answer 22

根据上面的建议我制定了进度条。

但是我想指出一些缺点

每次刷新进度条时，它都会从新行开始
```
print('\r[{0}]{1}%'.format('#' * progress* 10, progress))  
```
像这样：
[] 0％
[＃] 10％
[##] 20％
[###] 30％

2.方括号']'和右侧的百分比数字向右移动，因为'###'变长。
3.如果表达式“progress / 10”不能返回整数，则会发生错误。

以下代码将解决上述问题。

def update_progress(progress, total):  
    print('\r[{0:10}]{1:>2}%'.format('#' * int(progress * 10 /total), progress), end='')

Answer 23

python终端进度条的代码

import sys
import time

max_length = 5
at_length = max_length
empty = "-"
used = "%"

bar = empty * max_length

for i in range(0, max_length):
    at_length -= 1

    #setting empty and full spots
    bar = used * i
    bar = bar+empty * at_length

    #\r is carriage return(sets cursor position in terminal to start of line)
    #\0 character escape

    sys.stdout.write("[{}]\0\r".format(bar))
    sys.stdout.flush()

    #do your stuff here instead of time.sleep
    time.sleep(1)

sys.stdout.write("\n")
sys.stdout.flush()

Answer 24

汇总我在这里找到的一些想法，并添加估计的时间：

import datetime, sys

start = datetime.datetime.now()

def print_progress_bar (iteration, total):

    process_duration_samples = []
    average_samples = 5

    end = datetime.datetime.now()

    process_duration = end - start

    if len(process_duration_samples) == 0:
        process_duration_samples = [process_duration] * average_samples

    process_duration_samples = process_duration_samples[1:average_samples-1] + [process_duration]
    average_process_duration = sum(process_duration_samples, datetime.timedelta()) / len(process_duration_samples)
    remaining_steps = total - iteration
    remaining_time_estimation = remaining_steps * average_process_duration

    bars_string = int(float(iteration) / float(total) * 20.)
    sys.stdout.write(
        "\r[%-20s] %d%% (%s/%s) Estimated time left: %s" % (
            '='*bars_string, float(iteration) / float(total) * 100,
            iteration,
            total,
            remaining_time_estimation
        ) 
    )
    sys.stdout.flush()
    if iteration + 1 == total:
        print 


# Sample usage

for i in range(0,300):
    print_progress_bar(i, 300)

Answer 25

从Greenstick for 2.7：

的功能

def printProgressBar (iteration, total, prefix = '', suffix = '',decimals = 1, length = 100, fill = '#'):

percent = ("{0:." + str(decimals) + "f}").format(100 * (iteration / float(total)))
filledLength = int(length * iteration // total)
bar = fill * filledLength + '-' * (length - filledLength)
print'\r%s |%s| %s%% %s' % (prefix, bar, percent, suffix),
sys.stdout.flush()
# Print New Line on Complete                                                                                                                                                                                                              
if iteration == total:
    print()

Answer 26

python模块进度条是一个不错的选择。这是我的典型代码：

import time
import progressbar

widgets = [
    ' ', progressbar.Percentage(),
    ' ', progressbar.SimpleProgress(format='(%(value_s)s of %(max_value_s)s)'),
    ' ', progressbar.Bar('>', fill='.'),
    ' ', progressbar.ETA(format_finished='- %(seconds)s  -', format='ETA: %(seconds)s', ),
    ' - ', progressbar.DynamicMessage('loss'),
    ' - ', progressbar.DynamicMessage('error'),
    '                          '
]

bar = progressbar.ProgressBar(redirect_stdout=True, widgets=widgets)
bar.start(100)
for i in range(100):
    time.sleep(0.1)
    bar.update(i + 1, loss=i / 100., error=i)
bar.finish()

Answer 27

https://pypi.python.org/pypi/progressbar2/3.30.2

Progressbar2 是一个很好的库，用于命令行的ascii base progressbar 进口时间导入进度条

bar = progressbar.ProgressBar()
for i in bar(range(100)):
    time.sleep(0.02)
bar.finish()

https://pypi.python.org/pypi/tqdm

tqdm 是progressbar2的替代方案，我认为它在pip3中使用，但我不确定

from tqdm import tqdm
for i in tqdm(range(10000)):
...

Answer 28

我写了一个简单的进度条：

def bar(total, current, length=10, prefix="", filler="#", space=" ", oncomp="", border="[]", suffix=""):
    if len(border) != 2:
        print("parameter 'border' must include exactly 2 symbols!")
        return None

    print(prefix + border[0] + (filler * int(current / total * length) +
                                      (space * (length - int(current / total * length)))) + border[1], suffix, "\r", end="")
    if total == current:
        if oncomp:
            print(prefix + border[0] + space * int(((length - len(oncomp)) / 2)) +
                  oncomp + space * int(((length - len(oncomp)) / 2)) + border[1], suffix)
        if not oncomp:
            print(prefix + border[0] + (filler * int(current / total * length) +
                                        (space * (length - int(current / total * length)))) + border[1], suffix)

如您所见，它具有：条形长度，前缀和后缀，填充，空格，100％（oncomp）和边框上的文本

这里有一个例子：

from time import sleep, time
start_time = time()
for i in range(10):
    pref = str((i+1) * 10) + "% "
    complete_text = "done in %s sec" % str(round(time() - start_time))
    sleep(1)
    bar(10, i + 1, length=20, prefix=pref, oncomp=complete_text)

正在进行中：

30% [######              ]

完成后：

100% [   done in 9 sec   ]

Answer 29

这是我的Python 3解决方案：

import time
for i in range(100):
    time.sleep(1)
    s = "{}% Complete".format(i)
    print(s,end=len(s) * '\b')

'\ b'是字符串中每个字符的反斜杠。这在Windows cmd窗口中不起作用。

Answer 30

对于python 3：

def progress_bar(current_value, total):
    increments = 50
    percentual = ((current_value/ total) * 100)
    i = int(percentual // (100 / increments ))
    text = "\r[{0: <{1}}] {2}%".format('=' * i, increments, percentual)
    print(text, end="\n" if percentual == 100 else "")

Answer 31

这里的代码是有效的，我在发布之前对其进行了测试：

import sys
def prg(prog, fillchar, emptchar):
    fillt = 0
    emptt = 20
    if prog < 100 and prog > 0:
        prog2 = prog/5
        fillt = fillt + prog2
        emptt = emptt - prog2
        sys.stdout.write("\r[" + str(fillchar)*fillt + str(emptchar)*emptt + "]" + str(prog) + "%")
        sys.stdout.flush()
    elif prog >= 100:
        prog = 100
        prog2 = prog/5
        fillt = fillt + prog2
        emptt = emptt - prog2
        sys.stdout.write("\r[" + str(fillchar)*fillt + str(emptchar)*emptt + "]" + str(prog) + "%" + "\nDone!")
        sys.stdout.flush()
    elif prog < 0:
        prog = 0
        prog2 = prog/5
        fillt = fillt + prog2
        emptt = emptt - prog2
        sys.stdout.write("\r[" + str(fillchar)*fillt + str(emptchar)*emptt + "]" + str(prog) + "%" + "\nHalted!")
        sys.stdout.flush()

优点：

20个字符栏（每5个1个字符（数字））
自定义填充字符
自定义空字符
暂停（任何低于0的数字）
完成（100和100以上的任何数字）
进度计数（0-100（用于特殊功能的低于或高于））
bar旁边的百分比数字，它是一行

缺点：

仅支持整数（可以修改它以支持它们，通过使除法成为整数除法，因此只需将prog2 = prog/5更改为prog2 = int(prog/5)）

控制台中的文本进度条

31 个答案: