文本控制台中的进度栏 [英] Text Progress Bar in the Console

问题描述

有没有很好的方法来做以下？

Is there a good way to do the following?

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。

I wrote a simple console app to upload and download files from an FTP server using the ftplib.

每次下载一些数据块时，我想更新一个文本进度条，即使它只是一个数字。

Each time some data chunks are downloaded, I want to update a text progress bar, even if it's just a number.

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。）

But I don't want to erase all the text that's been printed to the console. (Doing a "clear" and then printing the updated percentage.)

推荐答案

我一直在使用@Vladimir下面的Ignatyev的解决方案和爱它：）

I've been using a modified version of @Vladimir Ignatyev's solution below and loving it : )

import sys

# Print iterations progress
def printProgress (iteration, total, prefix = '', suffix = '', decimals = 1, barLength = 100):
    """
    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)
        barLength   - Optional  : character length of bar (Int)
    """
    formatStr = "{0:." + str(decimals) + "f}"
    percent = formatStr.format(100 * (iteration / float(total)))
    filledLength = int(round(barLength * iteration / float(total)))
    bar = '█' * filledLength + '-' * (barLength - filledLength)
    sys.stdout.write('\r%s |%s| %s%s %s' % (prefix, bar, percent, '%', suffix)),
    if iteration == total:
        sys.stdout.write('\n')
    sys.stdout.flush()

# 
# Sample Usage
# 

from time import sleep

# make a list
items = list(range(0, 100))
i = 0
l = len(items)

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

# Sample Output
Progress: |█████████████████████████████████████████████-----| 90.0% Complete

这篇关于文本控制台中的进度栏的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！