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)

还有很多教程等着你去谷歌。

在Python命令行运行这个命令(不是在任何IDE或开发环境中):

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

在我的Windows系统上运行良好。

检查这个库:clint

它有很多功能，包括一个进度条:

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)

此链接提供了其功能的快速概述

Python 3

一个简单的，可定制的进度条

以下是我经常使用的答案的汇总(不需要导入)。

注意:这个答案中的所有代码都是为Python 3创建的;在python2中使用此代码请参见end of answer。

# Print iterations progress
def printProgressBar (iteration, total, prefix = '', suffix = '', decimals = 1, length = 100, fill = '█', printEnd = "\r"):
    """
    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)
        printEnd    - Optional  : end character (e.g. "\r", "\r\n") (Str)
    """
    percent = ("{0:." + str(decimals) + "f}").format(100 * (iteration / float(total)))
    filledLength = int(length * iteration // total)
    bar = fill * filledLength + '-' * (length - filledLength)
    print(f'\r{prefix} |{bar}| {percent}% {suffix}', end = printEnd)
    # Print New Line on Complete
    if iteration == total: 
        print()

示例使用

import time

# 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...
    time.sleep(0.1)
    # Update Progress Bar
    printProgressBar(i + 1, l, prefix = 'Progress:', suffix = 'Complete', length = 50)

样例输出

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

更新

在评论中有关于允许进度条动态调整终端窗口宽度的选项的讨论。虽然我不推荐这样做，但这里有一个实现该功能的要点(并注意注意事项)。

以上单次通话版本

下面的评论引用了一个类似问题的精彩答案。我喜欢它演示的易用性，并写了一个类似的，但选择不导入sys模块，而添加了上面原始printProgressBar函数的一些特性。

与上面的原始函数相比，这种方法的一些好处包括消除了对函数的初始调用，以0%打印进度条，并且枚举的使用变得可选(即不再显式地要求函数工作)。

def progressBar(iterable, prefix = '', suffix = '', decimals = 1, length = 100, fill = '█', printEnd = "\r"):
    """
    Call in a loop to create terminal progress bar
    @params:
        iterable    - Required  : iterable object (Iterable)
        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)
        printEnd    - Optional  : end character (e.g. "\r", "\r\n") (Str)
    """
    total = len(iterable)
    # Progress Bar Printing Function
    def printProgressBar (iteration):
        percent = ("{0:." + str(decimals) + "f}").format(100 * (iteration / float(total)))
        filledLength = int(length * iteration // total)
        bar = fill * filledLength + '-' * (length - filledLength)
        print(f'\r{prefix} |{bar}| {percent}% {suffix}', end = printEnd)
    # Initial Call
    printProgressBar(0)
    # Update Progress Bar
    for i, item in enumerate(iterable):
        yield item
        printProgressBar(i + 1)
    # Print New Line on Complete
    print()

示例使用

import time

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

# A Nicer, Single-Call Usage
for item in progressBar(items, prefix = 'Progress:', suffix = 'Complete', length = 50):
    # Do stuff...
    time.sleep(0.1)

样例输出

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

Python 2

要在Python 2中使用上述函数，请在脚本顶部将编码设置为UTF-8:

# -*- coding: utf-8 -*-

并替换这一行中的Python 3字符串格式:

print(f'\r{prefix} |{bar}| {percent}% {suffix}', end = printEnd)

Python 2字符串格式化:

print('\r%s |%s| %s%% %s' % (prefix, bar, percent, suffix), end = printEnd)

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)

还有很多教程等着你去谷歌。

根据上面的答案和其他类似的关于CLI进度条的问题，我想我得到了一个普遍的答案。请登录https://stackoverflow.com/a/15860757/2254146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%