对于Python 3.6，以下工作为我更新输出内联:

for current_epoch in range(10):
    for current_step) in range(100):
        print("Train epoch %s: Step %s" % (current_epoch, current_step), end="\r")
print()

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  

这是一个非常简单的方法，可以用于任何循环。

#!/usr/bin/python
for i in range(100001):
    s =  ((i/5000)*'#')+str(i)+(' %')
    print ('\r'+s),

如果你正在开发一个命令行界面，我建议你看看click，它非常好:

import click
import time

for filename in range(3):
    with click.progressbar(range(100), fill_char='=', empty_char=' ') as bar:
        for user in bar:
            time.sleep(0.01)

下面是你得到的输出:

$ python test.py
  [====================================]  100%
  [====================================]  100%
  [=========                           ]   27%

你可以使用\r(回车)。演示:

import sys
total = 10000000
point = total / 100
increment = total / 20
for i in xrange(total):
    if(i % (5 * point) == 0):
        sys.stdout.write("\r[" + "=" * (i / increment) +  " " * ((total - i)/ increment) + "]" +  str(i / point) + "%")
        sys.stdout.flush()

对于Python 3.6，以下工作为我更新输出内联:

for current_epoch in range(10):
    for current_step) in range(100):
        print("Train epoch %s: Step %s" % (current_epoch, current_step), end="\r")
print()