用Python制作一个彩色进度条

以下是使用Python和ANSI转义序列制作彩色进度条的示例代码：

import time

def printProgressBar(iteration, total, prefix='', suffix='', decimals=1, length=50, 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('\033[2K\r%s |%s| %s%% %s' % (prefix, bar, percent, suffix), end=printEnd)
    # Print New Line on Complete
    if iteration == total:
        print()

# Example Usage
if __name__ == '__main__':
    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)

在这个示例中，我们使用了ANSI转义序列来控制终端中的文本属性和颜色。`\033[2K\r`序列用于清除当前行并将光标移到行首，以便我们可以更新进度条的值。我们还使用`\033`序列来设置文本颜色和样式，如`\033[1;31m`表示将文本设置为红色和加粗。