有沒有一種很好的方法來執行以下操作?控制檯中的文本進度條
我寫了一個簡單的控制檯應用程序,使用ftplib從FTP服務器上傳和下載文件。
每次下載一些數據塊時,我想更新文本進度條,即使它只是一個數字。
但我不想擦除已打印到控制檯的所有文本。 (做一個「清除」,然後打印更新的百分比。)
有沒有一種很好的方法來執行以下操作?控制檯中的文本進度條
我寫了一個簡單的控制檯應用程序,使用ftplib從FTP服務器上傳和下載文件。
每次下載一些數據塊時,我想更新文本進度條,即使它只是一個數字。
但我不想擦除已打印到控制檯的所有文本。 (做一個「清除」,然後打印更新的百分比。)
這裏有許多下面的答案我經常使用的集合體。
# Print iterations progress
def printProgressBar (iteration, total, prefix = '', suffix = '', decimals = 1, length = 100, fill = '█'):
"""
Call in a loop to create terminal progress bar
@params:
iteration - Required : current iteration (Int)
total - Required : total iterations (Int)
prefix - Optional : prefix string (Str)
suffix - Optional : suffix string (Str)
decimals - Optional : positive number of decimals in percent complete (Int)
length - Optional : character length of bar (Int)
fill - Optional : bar fill character (Str)
"""
percent = ("{0:." + str(decimals) + "f}").format(100 * (iteration/float(total)))
filledLength = int(length * iteration // total)
bar = fill * filledLength + '-' * (length - filledLength)
print('\r%s |%s| %s%% %s' % (prefix, bar, percent, suffix), end = '\r')
# Print New Line on Complete
if iteration == total:
print()
#
# Sample Usage
#
from time import sleep
# A List of Items
items = list(range(0, 57))
l = len(items)
# Initial call to print 0% progress
printProgressBar(0, l, prefix = 'Progress:', suffix = 'Complete', length = 50)
for i, item in enumerate(items):
# Do stuff...
sleep(0.1)
# Update Progress Bar
printProgressBar(i + 1, l, prefix = 'Progress:', suffix = 'Complete', length = 50)
# Sample Output
Progress: |█████████████████████████████████████████████-----| 90.0% Complete
這段代碼很棒!我遇到了一些小問題,所以我做了一些小修改(PEP-8,非ASCII字符的默認編碼),並將它們扔在這裏: https://gist.github.com/aubricus/f91fb55dc6ba5557fbab06119420dd6a – Aubricus 2016-11-03 18:01:09
Worth注意UTF-8聲明沒有必要,除非你使用Python 2 @Aubricus – Greenstick 2016-11-04 18:35:33
是的。好點子!我用筆記更新了要點。 – Aubricus 2016-11-07 18:28:48
寫一個\r
到控制檯。這是一個"carriage return",它導致它後面的所有文本在行首開始回顯。喜歡的東西:
def update_progress(progress):
print '\r[{0}] {1}%'.format('#'*(progress/10), progress)
,這將給你是這樣的:[ ########## ] 100%
這裏是用Python寫的一個進度的一個很好的例子:http://nadiana.com/animated-terminal-progress-bar-in-python
但是,如果你想自己動手寫。你可以使用curses
模塊使事情變得更容易:)
也許更容易不是詛咒的詞。但是如果你想創造一個完整的cui而不是詛咒爲你處理很多東西。
[編輯] 由於舊的鏈接是死的我都忍了我自己的一個Python進度的版本,在這裏獲得:https://github.com/WoLpH/python-progressbar
寫作「\ r」將光標移動回的開始線。
這將顯示一個百分比計:
import time
import sys
for i in range(100):
time.sleep(1)
sys.stdout.write("\r%d%%" % i)
sys.stdout.flush()
運行此在Python的命令行(任何IDE或開發環境不):我的Windows系統上
>>> import threading
>>> for i in range(50+1):
... threading._sleep(0.5)
... print "\r%3d" % i, ('='*i)+('-'*(50-i)),
工作正常。
import sys
def progresssbar():
for i in range(100):
time.sleep(1)
sys.stdout.write("%i\r" % i)
progressbar()
注:如果您在互動interepter運行此你獲得額外的數字打印出來
我使用progress from reddit。我喜歡它,因爲它可以在一行中打印每個項目的進度,並且它不應該從程序中清除打印輸出。
編輯:固定鏈接
你的鏈接被破壞 - 源代碼中的實際行是1274th,不是第1124!所以,正確的鏈接是這一個:https://github.com/reddit/reddit/blob/master/r2/r2/lib/utils/utils.py#L1274 – 2016-05-09 19:39:51
這個變種有我的口味最好的設計:它使用迭代器並可能與任何可測量的工作一起工作,它顯示已用時間。 – 2016-05-09 19:43:37
我意識到自己遲到了,但是這裏有一個我寫的輕微的Yum風格(紅帽)(不適合100 %的精度在這裏,但如果您使用的是準確的該級別的進度條,那麼你就錯了反正):
import sys
def cli_progress_test(end_val, bar_length=20):
for i in xrange(0, end_val):
percent = float(i)/end_val
hashes = '#' * int(round(percent * bar_length))
spaces = ' ' * (bar_length - len(hashes))
sys.stdout.write("\rPercent: [{0}] {1}%".format(hashes + spaces, int(round(percent * 100))))
sys.stdout.flush()
應該產生一種看起來像這樣:
Percent: [############## ] 69%
.. 。支架保持靜止,只有散列增加。
這可能會更好地作爲裝飾工作。另一天...
LOL我只是寫了這個 繼承人的代碼整體啄記住,你不能使用unicode做塊ASCII當我使用CP437
import os
import time
def load(left_side, right_side, length, time):
x = 0
y = ""
print "\r"
while x < length:
space = length - len(y)
space = " " * space
z = left + y + space + right
print "\r", z,
y += "█"
time.sleep(time)
x += 1
cls()
,並調用它像這樣
print "loading something awesome"
load("|", "|", 10, .01)
,所以它看起來像這樣
loading something awesome
|█████ |
e關於CLI進度條的答案和其他類似問題,我想我對所有人都有一個普遍的答案。檢查它在https://stackoverflow.com/a/15860757/2254146
綜上所述,代碼是這樣的:
import time, sys
# update_progress() : Displays or updates a console progress bar
## Accepts a float between 0 and 1. Any int will be converted to a float.
## A value under 0 represents a 'halt'.
## A value at 1 or bigger represents 100%
def update_progress(progress):
barLength = 10 # Modify this to change the length of the progress bar
status = ""
if isinstance(progress, int):
progress = float(progress)
if not isinstance(progress, float):
progress = 0
status = "error: progress var must be float\r\n"
if progress < 0:
progress = 0
status = "Halt...\r\n"
if progress >= 1:
progress = 1
status = "Done...\r\n"
block = int(round(barLength*progress))
text = "\rPercent: [{0}] {1}% {2}".format("#"*block + "-"*(barLength-block), progress*100, status)
sys.stdout.write(text)
sys.stdout.flush()
貌似
百分比:[##########] 99.0%
隨着上面的偉大建議我制定了進度條。
不過我想指出一些不足之處
每次進度條被刷新,就會啓動一個新行
print('\r[{0}]{1}%'.format('#' * progress* 10, progress))
這樣的:
[] 0 %
[#] 10%
[##] 20%
[###] 30%
2.方括號']'和右側的百分數右移,因爲'###'變長。
3.如果表達式'progress/10'不能返回整數,則會發生錯誤。
而下面的代碼將解決上述問題。
def update_progress(progress, total):
print('\r[{0:10}]{1:>2}%'.format('#' * int(progress * 10 /total), progress), end='')
那麼這裏是代碼的工作,我在發佈前測試過它:
import sys
def prg(prog, fillchar, emptchar):
fillt = 0
emptt = 20
if prog < 100 and prog > 0:
prog2 = prog/5
fillt = fillt + prog2
emptt = emptt - prog2
sys.stdout.write("\r[" + str(fillchar)*fillt + str(emptchar)*emptt + "]" + str(prog) + "%")
sys.stdout.flush()
elif prog >= 100:
prog = 100
prog2 = prog/5
fillt = fillt + prog2
emptt = emptt - prog2
sys.stdout.write("\r[" + str(fillchar)*fillt + str(emptchar)*emptt + "]" + str(prog) + "%" + "\nDone!")
sys.stdout.flush()
elif prog < 0:
prog = 0
prog2 = prog/5
fillt = fillt + prog2
emptt = emptt - prog2
sys.stdout.write("\r[" + str(fillchar)*fillt + str(emptchar)*emptt + "]" + str(prog) + "%" + "\nHalted!")
sys.stdout.flush()
優點:
缺點:
prog2 = prog/5
prog2 = int(prog/5)
)這裏是我的Python 3溶液:
import time
for i in range(100):
time.sleep(1)
s = "{}% Complete".format(i)
print(s,end=len(s) * '\b')
'\ B' 是一個反斜槓,在您的字符串的每個字符。 這在Windows cmd窗口中不起作用。
和,只是添加到一堆,這裏是一個對象,你可以使用
import sys
class ProgressBar(object):
DEFAULT_BAR_LENGTH = 65
DEFAULT_CHAR_ON = '='
DEFAULT_CHAR_OFF = ' '
def __init__(self, end, start=0):
self.end = end
self.start = start
self._barLength = self.__class__.DEFAULT_BAR_LENGTH
self.setLevel(self.start)
self._plotted = False
def setLevel(self, level):
self._level = level
if level < self.start: self._level = self.start
if level > self.end: self._level = self.end
self._ratio = float(self._level - self.start)/float(self.end - self.start)
self._levelChars = int(self._ratio * self._barLength)
def plotProgress(self):
sys.stdout.write("\r %3i%% [%s%s]" %(
int(self._ratio * 100.0),
self.__class__.DEFAULT_CHAR_ON * int(self._levelChars),
self.__class__.DEFAULT_CHAR_OFF * int(self._barLength - self._levelChars),
))
sys.stdout.flush()
self._plotted = True
def setAndPlot(self, level):
oldChars = self._levelChars
self.setLevel(level)
if (not self._plotted) or (oldChars != self._levelChars):
self.plotProgress()
def __add__(self, other):
assert type(other) in [float, int], "can only add a number"
self.setAndPlot(self._level + other)
return self
def __sub__(self, other):
return self.__add__(-other)
def __iadd__(self, other):
return self.__add__(other)
def __isub__(self, other):
return self.__add__(-other)
def __del__(self):
sys.stdout.write("\n")
if __name__ == "__main__":
import time
count = 150
print "starting things:"
pb = ProgressBar(count)
#pb.plotProgress()
for i in range(0, count):
pb += 1
#pb.setAndPlot(i + 1)
time.sleep(0.01)
del pb
print "done"
結果:
starting things:
100% [=================================================================]
done
這將最常被認爲是「潔癖」,但它的方便,當你使用它很多
tqdm: add a progress meter to your loops in a second:
>>> import time
>>> from tqdm import tqdm
>>> for i in tqdm(range(100)):
... time.sleep(1)
...
|###-------| 35/100 35% [elapsed: 00:35 left: 01:05, 1.00 iters/sec]
它少於10行代碼。
的此處要點是:https://gist.github.com/vladignatyev/06860ec2040cb497f0f3
import sys
def progress(count, total, suffix=''):
bar_len = 60
filled_len = int(round(bar_len * count/float(total)))
percents = round(100.0 * count/float(total), 1)
bar = '=' * filled_len + '-' * (bar_len - filled_len)
sys.stdout.write('[%s] %s%s ...%s\r' % (bar, percents, '%', suffix))
sys.stdout.flush() # As suggested by Rom Ruben
將「sys.stdout.flush()」添加到函數的結尾。 – RomRuben 2015-07-07 11:25:44
對我來說,它在一個新的行 – 2017-05-04 13:31:47
@GM你使用什麼操作系統/平臺? – 2017-05-05 14:47:09
import time,sys
for i in range(100+1):
time.sleep(0.1)
sys.stdout.write(('='*i)+(''*(100-i))+("\r [ %d"%i+"% ] "))
sys.stdout.flush()
輸出
[29%] ================= ==
嘗試使用由Python Mozart,Armin Ronacher編寫的click庫。
$ pip install click # both 2 and 3 compatible
要創建一個簡單的進度條:
import click
with click.progressbar(range(1000000)) as bar:
for i in bar:
pass
這是什麼樣子:
# [###-------------------------------] 9% 00:01:14
自定義你的心內容:
import click, sys
with click.progressbar(range(100000), file=sys.stderr, show_pos=True, width=70, bar_template='(_(_)=%(bar)sD(_(_| %(info)s', fill_char='=', empty_char=' ') as bar:
for i in bar:
pass
自定義外觀:
(_(_)===================================D(_(_| 100000/100000 00:00:02
甚至有更多的選擇,請參閱API docs:
click.progressbar(iterable=None, length=None, label=None, show_eta=True, show_percent=None, show_pos=False, item_show_func=None, fill_char='#', empty_char='-', bar_template='%(label)s [%(bar)s] %(info)s', info_sep=' ', width=36, file=None, color=None)
爲Python終端進度條代碼
import sys
import time
max_length = 5
at_length = max_length
empty = "-"
used = "%"
bar = empty * max_length
for i in range(0, max_length):
at_length -= 1
#setting empty and full spots
bar = used * i
bar = bar+empty * at_length
#\r is carriage return(sets cursor position in terminal to start of line)
#\0 character escape
sys.stdout.write("[{}]\0\r".format(bar))
sys.stdout.flush()
#do your stuff here instead of time.sleep
time.sleep(1)
sys.stdout.write("\n")
sys.stdout.flush()
我建議使用tqdm - https://pypi.python.org/pypi/tqdm - 這使得它簡單把任何可迭代或加工成一個進度條,並處理所有與所需終端搞亂。
從文檔: 「tqdm可以很容易地支持回調/鉤和手動更新以下是包含的urllib示例」 從青枝
import urllib
from tqdm import tqdm
def my_hook(t):
"""
Wraps tqdm instance. Don't forget to close() or __exit__()
the tqdm instance once you're done with it (easiest using `with` syntax).
Example
-------
>>> with tqdm(...) as t:
... reporthook = my_hook(t)
... urllib.urlretrieve(..., reporthook=reporthook)
"""
last_b = [0]
def inner(b=1, bsize=1, tsize=None):
"""
b : int, optional
Number of blocks just transferred [default: 1].
bsize : int, optional
Size of each block (in tqdm units) [default: 1].
tsize : int, optional
Total size (in tqdm units). If [default: None] remains unchanged.
"""
if tsize is not None:
t.total = tsize
t.update((b - last_b[0]) * bsize)
last_b[0] = b
return inner
eg_link = 'http://www.doc.ic.ac.uk/~cod11/matryoshka.zip'
with tqdm(unit='B', unit_scale=True, miniters=1,
desc=eg_link.split('/')[-1]) as t: # all optional kwargs
urllib.urlretrieve(eg_link, filename='/dev/null',
reporthook=my_hook(t), data=None)
功能爲2.7:
def printProgressBar (iteration, total, prefix = '', suffix = '',decimals = 1, length = 100, fill = '#'):
percent = ("{0:." + str(decimals) + "f}").format(100 * (iteration/float(total)))
filledLength = int(length * iteration // total)
bar = fill * filledLength + '-' * (length - filledLength)
print'\r%s |%s| %s%% %s' % (prefix, bar, percent, suffix),
sys.stdout.flush()
# Print New Line on Complete
if iteration == total:
print()
蛇皮模塊進度條是一個不錯的選擇。 這裏是我的典型代碼:
import time
import progressbar
widgets = [
' ', progressbar.Percentage(),
' ', progressbar.SimpleProgress(format='(%(value_s)s of %(max_value_s)s)'),
' ', progressbar.Bar('>', fill='.'),
' ', progressbar.ETA(format_finished='- %(seconds)s -', format='ETA: %(seconds)s',),
' - ', progressbar.DynamicMessage('loss'),
' - ', progressbar.DynamicMessage('error'),
' '
]
bar = progressbar.ProgressBar(redirect_stdout=True, widgets=widgets)
bar.start(100)
for i in range(100):
time.sleep(0.1)
bar.update(i + 1, loss=i/100., error=i)
bar.finish()
https://pypi.python.org/pypi/progressbar2/3.30.2
Progressbar2是ASCII基地進度的命令行 進口時間 進口進度
bar = progressbar.ProgressBar()
for i in bar(range(100)):
time.sleep(0.02)
bar.finish()
https://pypi.python.org/pypi/tqdm
一個好的圖書館tqdm是progressbar2的替代方案,我認爲這在PIP3使用,但我不知道那
from tqdm import tqdm
for i in tqdm(range(10000)):
...
我寫了一個簡單的進度:
def bar(total, current, length=10, prefix="", filler="#", space=" ", oncomp="", border="[]", suffix=""):
if len(border) != 2:
print("parameter 'border' must include exactly 2 symbols!")
return None
print(prefix + border[0] + (filler * int(current/total * length) +
(space * (length - int(current/total * length)))) + border[1], suffix, "\r", end="")
if total == current:
if oncomp:
print(prefix + border[0] + space * int(((length - len(oncomp))/2)) +
oncomp + space * int(((length - len(oncomp))/2)) + border[1], suffix)
if not oncomp:
print(prefix + border[0] + (filler * int(current/total * length) +
(space * (length - int(current/total * length)))) + border[1], suffix)
,你可以看到,它有:
from time import sleep, time
start_time = time()
for i in range(10):
pref = str((i+1) * 10) + "% "
complete_text = "done in %s sec" % str(round(time() - start_time))
sleep(1)
bar(10, i + 1, length=20, prefix=pref, oncomp=complete_text)
:巴,前綴和後綴,填料,空間,在文本條上的100%(oncomp)和邊界
這裏的示例的長度
了進展:
30% [###### ]
出來完成:
100% [ done in 9 sec ]
放在一起的一些我發現這裏的想法,並增加估計剩餘時間:
import datetime, sys
start = datetime.datetime.now()
def print_progress_bar (iteration, total):
process_duration_samples = []
average_samples = 5
end = datetime.datetime.now()
process_duration = end - start
if len(process_duration_samples) == 0:
process_duration_samples = [process_duration] * average_samples
process_duration_samples = process_duration_samples[1:average_samples-1] + [process_duration]
average_process_duration = sum(process_duration_samples, datetime.timedelta())/len(process_duration_samples)
remaining_steps = total - iteration
remaining_time_estimation = remaining_steps * average_process_duration
bars_string = int(float(iteration)/float(total) * 20.)
sys.stdout.write(
"\r[%-20s] %d%% (%s/%s) Estimated time left: %s" % (
'='*bars_string, float(iteration)/float(total) * 100,
iteration,
total,
remaining_time_estimation
)
)
sys.stdout.flush()
if iteration + 1 == total:
print
# Sample usage
for i in range(0,300):
print_progress_bar(i, 300)
安裝tqdm
(pip install tqdm
) 並如下使用它:
import time
from tqdm import tqdm
for i in tqdm(range(1000)):
time.sleep(0.01)
這是會輸出這樣的10秒作爲一個進度條:
47%|██████████████████▊ | 470/1000 [00:04<00:05, 98.61it/s]
你也可以只使用一個圖形用戶界面(如果你開始做任何事情,這將節省你到底有多麻煩前進在應用程序)它不是1960年了) – 2010-07-04 00:55:34
嗯,看起來像這個問題的重複問昨天:http://stackoverflow.com/questions/3160699/python-progress-bar/3162864 所以,你應該使用魚http://pypi.python.org/pypi/fish/ – Etienne 2010-07-04 02:33:35
「只使用GUI」誤解了GUI在某些情況下很棒(快速學習曲線,專門的探索性或交互式或一次性活動),而命令行工具對其他人來說非常適用(專家用戶,即時編寫臨時應用程序以多次執行精心定義的操作。) – 2016-05-11 02:54:28