如何在控制台上的相同位置写入输出？

Question

我是python的新手,我正在编写一些脚本来自动从FTP服务器等下载文件.我想显示下载的进度,但我希望它保持在相同的位置,例如:

输出:

正在下载文件FooFile.txt [47%]

我试图避免这样的事情:

     Downloading File FooFile.txt [47%]
     Downloading File FooFile.txt [48%]
     Downloading File FooFile.txt [49%]

我应该怎么做呢？

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重复: 如何在命令行应用程序中打印当前行？

Answer 1

您还可以使用回车:

sys.stdout.write("Download progress: %d%%   \r" % (progress) )
sys.stdout.flush()

Answer 2

使用像curses模块这样的终端处理库:

curses模块提供了curses库的接口,这是便携式高级终端处理的事实标准.

Answer 3

Python 2

我喜欢以下内容:

print 'Downloading File FooFile.txt [%d%%]\r'%i,

演示:

import time

for i in range(100):
    time.sleep(0.1)
    print 'Downloading File FooFile.txt [%d%%]\r'%i,

Python 3

print('Downloading File FooFile.txt [%d%%]\r'%i, end="")

演示:

import time

for i in range(100):
    time.sleep(0.1)
    print('Downloading File FooFile.txt [%d%%]\r'%i, end="")

Answer 4

\b多次打印退格符,然后用新号码覆盖旧号码.

Answer 5

#kinda like the one above but better :P

from __future__ import print_function
from time import sleep

for i in range(101):
  str1="Downloading File FooFile.txt [{}%]".format(i)
  back="\b"*len(str1)
  print(str1, end="")
  sleep(0.1)
  print(back, end="")

Answer 6

对于Python 3xx：

import time
for i in range(10):
    time.sleep(0.2) 
    print ("\r Loading... {}".format(i)+str(i), end="")