如何打印出状态栏和百分比?

实现如下所示的状态栏:

[==========                ]  45%
[================          ]  60%
[==========================] 100%

我想把这个打印到标准输出，并保持刷新，而不是打印到另一行。如何做到这一点?

当前回答

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。

下面是这个函数的一个副本，但是为了适合你的风格进行了修改:

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 = 20 # 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%

2013-04-07 11:53:27

其他回答

import progressbar
import time

# Function to create  
def animated_marker():
    widgets = ['Loading: ', progressbar.Bar('=', '[', ']', '-'), progressbar.Percentage()]
    bar = progressbar.ProgressBar(max_value=200,widgets=widgets).start() 
      
    for i in range(200): 
        time.sleep(0.1)
        bar.update(i+1)
    bar.finish()

# Driver's code 
animated_marker()

2021-01-02 05:58:25

只使用内置的sys:

import sys

def print_progress_bar(index, total, label):
    n_bar = 50  # Progress bar width
    progress = index / total
    sys.stdout.write('\r')
    sys.stdout.write(f"[{'=' * int(n_bar * progress):{n_bar}s}] {int(100 * progress)}%  {label}")
    sys.stdout.flush()

用法:

foo_list = ["a", "b", "c", "d"]
total = len(foo_list)

for index, item in enumerate(foo_list):
    print_progress_bar(index, total, "foo bar")
    sleep(0.5)

Enumerate (foo_list)使您可以在循环期间访问索引值。

输出:

[================================================  ] 96%  foo bar

2019-10-29 06:29:50

def printProgressBar(value,label):
    n_bar = 40 #size of progress bar
    max = 100
    j= value/max
    sys.stdout.write('\r')
    bar = '█' * int(n_bar * j)
    bar = bar + '-' * int(n_bar * (1-j))

    sys.stdout.write(f"{label.ljust(10)} | [{bar:{n_bar}s}] {int(100 * j)}% ")
    sys.stdout.flush()

电话:

printProgressBar(30,"IP")

知识产权 |[██████████████----------------------------] 30%

2020-07-28 14:14:35

要成为纯python并且不进行系统调用:

from time import sleep

for i in range(21):
    spaces = " " * (20 - i)
    percentage = 5*i
    print(f"\r[{'='*i}{spaces}]{percentage}%", flush=True, end="")
    sleep(0.25)

2020-10-23 18:31:29