问题
I am new to python and am writing some scripts to automate downloading files from FTP servers, etc. I want to show the progress of the download, but I want it to stay in the same position, such as:
output:
Downloading File FooFile.txt [47%]
I\'m trying to avoid something like this:
Downloading File FooFile.txt [47%]
Downloading File FooFile.txt [48%]
Downloading File FooFile.txt [49%]
How should I go about doing this?
Duplicate: How can I print over the current line in a command line application?
回答1:
You can also use the carriage return:
sys.stdout.write("Download progress: %d%% \r" % (progress) )
sys.stdout.flush()
回答2:
Use a terminal-handling library like the curses module:
The curses module provides an interface to the curses library, the de-facto standard for portable advanced terminal handling.
回答3:
Python 2
I like the following:
print 'Downloading File FooFile.txt [%d%%]\r'%i,
Demo:
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="")
Demo:
import time
for i in range(100):
time.sleep(0.1)
print('Downloading File FooFile.txt [%d%%]\r'%i, end="")
回答4:
Print the backspace character \b
several times, and then overwrite the old number with the new number.
回答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="")
回答6:
For Python 3xx:
import time
for i in range(10):
time.sleep(0.2)
print ("\r Loading... {}".format(i)+str(i), end="")
回答7:
A neat solution that has been working for me is:
from __future__ import print_function
import sys
for i in range(10**6):
perc = float(i) / 10**6 * 100
print(">>> Download is {}% complete ".format(perc), end='\r')
sys.stdout.flush()
print("")
The sys.stdout.flush
is important otherwise it gets really clunky and the print("")
on for loop exit is also important.
UPDATE: As mentioned in the comments, print
also has a flush
argument. So the following will also work:
from __future__ import print_function
for i in range(10**6):
perc = float(i) / 10**6 * 100
print(">>> Download is {}% complete ".format(perc), end='\r', flush=True)
print("")
回答8:
x="A Sting {}"
for i in range(0,1000000):
y=list(x.format(i))
print(x.format(i),end="")
for j in range(0,len(y)):
print("\b",end="")
来源:https://stackoverflow.com/questions/517127/how-do-i-write-output-in-same-place-on-the-console