可以用来在终端里显示出像这种效果的进度条 [================== ] 25.60% 的一个库。
当然我们也可以自己实现一个类似效果的进度条。
# coding=utf-8
from __future__ import division
import math
import time
import sys
def progressbar(cur, total):
percent = '{:.2%}'.format(cur / total)
sys.stdout.write('\r')
sys.stdout.write("[%-50s] %s" % (
'=' * int(math.floor(cur * 50 / total)),
percent))
sys.stdout.flush()
t = 0
while t < 9.9:
t += 0.1
time.sleep(0.1)
progressbar(t,10)
print
执行效果就是一个动态的增长的进度条的效果。
# python code\progressbar_demo.py
[================================================= ] 100.00%
或者像这个
# coding=utf-8
from __future__ import division
import sys,time
j = '#'
if __name__ == '__main__':
for i in range(1,61):
j += '#'
sys.stdout.write(str(int((i/60)*100))+'% ||'+j+'->'+"\r")
sys.stdout.flush()
time.sleep(0.5)
print
效果就是这样。
# python code\progressbar_demo2.py
100% ||#############################################################->
还有这样，但是不能动态的显示已完成百分比。
# coding=utf-8
from __future__ import division
import sys,time
if __name__ == '__main__':
for i in range(1,61):
sys.stdout.write('#'+'->'+"\b\b")
sys.stdout.flush()
time.sleep(0.5)
print
效果是这样。
# spython code\progressbar_demo3.py
############################################################->
最后一个
# coding=utf-8
class progressbarClass:
def __init__(self, finalcount, progresschar=None):
import sys
self.finalcount=finalcount
self.blockcount=0
#
# See if caller passed me a character to use on the
# progress bar (like "*"). If not use the block
# character that makes it look like a real progress
# bar.
#
if not progresschar: self.block=chr(178)
else: self.block=progresschar
#
# Get pointer to sys.stdout so I can use the write/flush
# methods to display the progress bar.
#
self.f=sys.stdout
#
# If the final count is zero, don't start the progress gauge
#
if not self.finalcount : return
self.f.write('\n------------------- % Progress -------------------\n')
return
def progress(self, count):
#
# Make sure I don't try to go off the end (e.g. >100%)
#
count=min(count, self.finalcount)
#
# If finalcount is zero, I'm done
#
if self.finalcount:
percentcomplete=int(round(100*count/self.finalcount))
if percentcomplete < 1: percentcomplete=1
else:
percentcomplete=100
#print "percentcomplete=",percentcomplete
blockcount=int(percentcomplete/2)
#print "blockcount=",blockcount
if blockcount > self.blockcount:
for i in range(self.blockcount,blockcount):
self.f.write(self.block)
self.f.flush()
if percentcomplete == 100: self.f.write("\n")
self.blockcount=blockcount
return
if __name__ == "__main__":
from time import sleep
# pb=progressbarClass(8,"*")
pb=progressbarClass(8,"#")
count=0
while count < 9 :
count+=1
pb.progress(count)
sleep(0.2)
结果就是这样
# python code\progressbar_demo4.py
------------------- % Progress -------------------
##################################################
但是这样的最好看
# -*- coding: utf-8 -*-
from __future__ import division
import sys
import time
def progress():
for i in range(100):
sys.stdout.write("\r[%s%s] %2d%%" % ('█' * i, ' ' * (99 - i), (i / 99) * 100))
sys.stdout.flush()
time.sleep(0.1)
sys.stdout.write('\n')
if __name__ == '__main__':
progress()
效果是这样
# python download_progress_demo.py
[███████████████████████████████████████████████████████████████████████████████████████████████████] 100%
# coding=utf-8
from __future__ import division
import sys,time
import progressbar
total = 1000
# 基本用法
progress = progressbar.ProgressBar()
for i in progress(range(total)):
time.sleep(0.01)
pbar = progressbar.ProgressBar().start()
for i in range(1,1000):
pbar.update(int((i/(total-1))*100))
time.sleep(0.01)
pbar.finish()
# 高级用法
widgets = ['Progress: ', progressbar.Percentage(), ' ', Bar(marker=progressbar.RotatingMarker('>-=')),
' ', progressbar.ETA(), ' ', progressbar.FileTransferSpeed()]
pbar = progressbar.ProgressBar(widgets=widgets, maxval=10000000).start()
for i in range(1000000):
pbar.update(10*i+1)
time.sleep(0.0001)
pbar.finish()
pbar = progressbar.ProgressBar(maxval=100,widgets=[progressbar.Bar('=', '[', ']'), ' ', progressbar.Percentage()]).start()
for i in xrange(100):
time.sleep(0.01)
pbar.update(i+1)
pbar.finish()
效果如下
$ python code\progressbar_first.py
100% |########################################################################|
100% |########################################################################|
Progress: 100% |>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>| Time: 0:00:02 3.82 MB/s
[========================================================================] 100%
还有一个官方给的例子
# coding=utf-8
import sys
import time
from progressbar import AnimatedMarker, Bar, BouncingBar, Counter, ETA, \
FileTransferSpeed, FormatLabel, Percentage, \
ProgressBar, ReverseBar, RotatingMarker, \
SimpleProgress, Timer
examples = []
def example(fn):
try: name = 'Example %d' % int(fn.__name__[7:])
except: name = fn.__name__
def wrapped():
try:
sys.stdout.write('Running: %s\n' % name)
fn()
sys.stdout.write('\n')
except KeyboardInterrupt:
sys.stdout.write('\nSkipping example.\n\n')
examples.append(wrapped)
return wrapped
@example
def example0():
pbar = ProgressBar(widgets=[Percentage(), Bar()], maxval=300).start()
for i in range(300):
time.sleep(0.01)
pbar.update(i+1)
pbar.finish()
@example
def example1():
widgets = ['Test: ', Percentage(), ' ', Bar(marker=RotatingMarker()),
' ', ETA(), ' ', FileTransferSpeed()]
pbar = ProgressBar(widgets=widgets, maxval=10000000).start()
for i in range(1000000):
# do something
pbar.update(10*i+1)
pbar.finish()
@example
def example2():
class CrazyFileTransferSpeed(FileTransferSpeed):
"""It's bigger between 45 and 80 percent."""
def update(self, pbar):
if 45 < pbar.percentage() < 80:
return 'Bigger Now ' + FileTransferSpeed.update(self,pbar)
else:
return FileTransferSpeed.update(self,pbar)
widgets = [CrazyFileTransferSpeed(),' <<<', Bar(), '>>> ',
Percentage(),' ', ETA()]
pbar = ProgressBar(widgets=widgets, maxval=10000000)
# maybe do something
pbar.start()
for i in range(2000000):
# do something
pbar.update(5*i+1)
pbar.finish()
@example
def example3():
widgets = [Bar('>'), ' ', ETA(), ' ', ReverseBar('<')]
pbar = ProgressBar(widgets=widgets, maxval=10000000).start()
for i in range(1000000):
# do something
pbar.update(10*i+1)
pbar.finish()
@example
def example4():
widgets = ['Test: ', Percentage(), ' ',
Bar(marker='0',left='[',right=']'),
' ', ETA(), ' ', FileTransferSpeed()]
pbar = ProgressBar(widgets=widgets, maxval=500)
pbar.start()
for i in range(100,500+1,50):
time.sleep(0.2)
pbar.update(i)
pbar.finish()
@example
def example5():
pbar = ProgressBar(widgets=[SimpleProgress()], maxval=17).start()
for i in range(17):
time.sleep(0.2)
pbar.update(i + 1)
pbar.finish()
@example
def example6():
pbar = ProgressBar().start()
for i in range(100):
time.sleep(0.01)
pbar.update(i + 1)
pbar.finish()
@example
def example7():
pbar = ProgressBar() # Progressbar can guess maxval automatically.
for i in pbar(range(80)):
time.sleep(0.01)
@example
def example8():
pbar = ProgressBar(maxval=80) # Progressbar can't guess maxval.
for i in pbar((i for i in range(80))):
time.sleep(0.01)
@example
def example9():
pbar = ProgressBar(widgets=['Working: ', AnimatedMarker()])
for i in pbar((i for i in range(50))):
time.sleep(.08)
@example
def example10():
widgets = ['Processed: ', Counter(), ' lines (', Timer(), ')']
pbar = ProgressBar(widgets=widgets)
for i in pbar((i for i in range(150))):
time.sleep(0.1)
@example
def example11():
widgets = [FormatLabel('Processed: %(value)d lines (in: %(elapsed)s)')]
pbar = ProgressBar(widgets=widgets)
for i in pbar((i for i in range(150))):
time.sleep(0.1)
@example
def example12():
widgets = ['Balloon: ', AnimatedMarker(markers='.oO@* ')]
pbar = ProgressBar(widgets=widgets)
for i in pbar((i for i in range(24))):
time.sleep(0.3)
@example
def example13():
# You may need python 3.x to see this correctly
try:
widgets = ['Arrows: ', AnimatedMarker(markers='←↖↑↗→↘↓↙')]
pbar = ProgressBar(widgets=widgets)
for i in pbar((i for i in range(24))):
time.sleep(0.3)
except UnicodeError: sys.stdout.write('Unicode error: skipping example')
@example
def example14():
# You may need python 3.x to see this correctly
try:
widgets = ['Arrows: ', AnimatedMarker(markers='◢◣◤◥')]
pbar = ProgressBar(widgets=widgets)
for i in pbar((i for i in range(24))):
time.sleep(0.3)
except UnicodeError: sys.stdout.write('Unicode error: skipping example')
@example
def example15():
# You may need python 3.x to see this correctly
try:
widgets = ['Wheels: ', AnimatedMarker(markers='◐◓◑◒')]
pbar = ProgressBar(widgets=widgets)
for i in pbar((i for i in range(24))):
time.sleep(0.3)
except UnicodeError: sys.stdout.write('Unicode error: skipping example')
@example
def example16():
widgets = [FormatLabel('Bouncer: value %(value)d - '), BouncingBar()]
pbar = ProgressBar(widgets=widgets)
for i in pbar((i for i in range(180))):
time.sleep(0.05)
@example
def example17():
widgets = [FormatLabel('Animated Bouncer: value %(value)d - '),
BouncingBar(marker=RotatingMarker())]
pbar = ProgressBar(widgets=widgets)
for i in pbar((i for i in range(180))):
time.sleep(0.05)
@example
def example18():
widgets = [Percentage(),
' ', Bar(),
' ', ETA(),
' ', AdaptiveETA()]
pbar = ProgressBar(widgets=widgets, maxval=500)
pbar.start()
for i in range(500):
time.sleep(0.01 + (i < 100) * 0.01 + (i > 400) * 0.9)
pbar.update(i + 1)
pbar.finish()
@example
def example19():
pbar = ProgressBar()
for i in pbar([]):
pass
pbar.finish()
try:
for example in examples:
example()
except KeyboardInterrupt:
sys.stdout('\nQuitting examples.\n')
不知道为什么第十八个和十九个失败了。
tqdm 也可以实现一种比较好的实现命令行动态进度条的效果
# coding=utf-8
from time import sleep
from tqdm import tqdm
for i in tqdm(range(1, 500)):
sleep(0.01)