问题
Is there a way in python to print something in the command line above the last line printed? Or, similarly to what I want to achieve, remain the last line intact, that is, not overwrite it.
The goal of this is to let the last line in the command line a status/precentage bar.
Output example:
File 1 processed
(0.1% Completed)
Next refresh:
File 1 processed
File 2 processed
(0.2% Completed)
Next refresh:
File 1 processed
File 2 processed
File 3 processed
(0.3% Completed)
回答1:
from time import sleep
erase = '\x1b[1A\x1b[2K'
def download(number):
print(erase + "File {} processed".format(number))
def completed(percent):
print("({:1.1}% Completed)".format(percent))
for i in range(1,4):
download(i)
completed(i/10)
sleep(1)
Works in my python 3.4, final output is:
File 1 processed
File 2 processed
File 3 processed
(0.3% Completed)
If you want read more about terminal escape codes try: https://en.wikipedia.org/wiki/ANSI_escape_code
As requested, example with a space:
from time import sleep
erase = '\x1b[1A\x1b[2K'
def download(number):
print(erase*2 + "File {} processed".format(number))
def completed(percent):
print("\n({:1.1}% Completed)".format(percent))
print("\n(0.0% Completed)")
for i in range(1,5):
download(i)
completed(i/10)
sleep(1)
The final output is:
File 1 processed
File 2 processed
File 3 processed
File 4 processed
(0.4% Completed)
回答2:
Take a look at the \r
command. This could do the trick.
for i in range(2):
print '\rFile %s processed' % i
print '(0.%s%% Completed)' % i,
Output is:
File 0 processed
File 1 processed
(0.1% Completed)
来源:https://stackoverflow.com/questions/43373707/python-output-above-the-last-printed-line