Python进度条

1、手写进度条

import time
scale = 50
print("开始执行".center(scale  2,"-"))
start = time.perf_counter()
for i in range(scale + 1):
    a = "*" * i
    b = "." * (scale - i)
    c = (i  scale) * 100
    dur = time.perf_counter() - start
    print("\r{:^3.0f}%[{}->{}]{:.2f}s".format(c,a,b,dur),end = "")
    time.sleep(0.1)

print("\n"+"执行结束".center(scale  2,"-"))

2、Tqdm

import time
from progress.bar import IncrementalBar
mylist = [1,2,3,4,5,6,7,8]
bar = IncrementalBar('Countdown', max = len(mylist))
for item in mylist:
    bar.next()
    time.sleep(1)
    bar.finish()

tqdm模块参数

class tqdm():
  """
  Decorate an iterable object, returning an iterator which acts exactly
  like the original iterable, but prints a dynamically updating
  progressbar every time a value is requested.
  """

  def __init__(self, iterable=None, desc=None, total=None, leave=True,
               file=None, ncols=None, mininterval=0.1,
               maxinterval=10.0, miniters=None, ascii=None, disable=False,
               unit='it', unit_scale=False, dynamic_ncols=False,
               smoothing=0.3, bar_format=None, initial=0, position=None,
               postfix=None, unit_divisor=1000):

tqdm针对jupyter notebook添加了专门的进度条美化方法

from tqdm.notebook import tqdm
import time

for i in tqdm(range(100),desc='example：'):
    time.sleep(0.01)

3、progressbar2

import progressbar
bar = progressbar.ProgressBar(widgets=[
    ' [', progressbar.Timer(), '] ',
    progressbar.Bar(),
    ' (', progressbar.ETA(), ') ',
])
for i in bar(range(100)):
    time.sleep(0.1)

4、progress

from progress.bar import Bar
bar = Bar('Processing', max=20)
for i in range(20):
    # Do some work
    bar.next()
bar.finish()

5、alive_progress

from alive_progress import show_bars
show_bars() # 查看内置 bar 样式
from alive_progress import show_spinners
show_spinners()# 查看内置 spinner 样式

import time
from alive_progress import alive_bar
# retrieve your set of items
items = range(100)       
# declare your expected total   
with alive_bar(len(items)) as bar:  
  # iterate as usual
  for item in items:        
    # process each item
    bar()
    time.sleep(0.1)

6、PySimpleGUI

import PySimpleGUI as sg
import time
mylist = [1,2,3,4,5,6,7,8]
for i, item in enumerate(mylist):
  sg.one_line_progress_meter('This is my progress meter!', i+1, len(mylist), '-key-')
  time.sleep(1)

7、rich

from rich.progress import track
def do_step(step):
    time.sleep(0.1)
for step in track(range(100)):
    do_step(step)

参考文档：

https://pypi.org/project/tqdm/ 

https://tqdm.github.io/ 

https://pypi.org/project/progressbar2/ 

https://progressbar-2.readthedocs.io/en/latest/ 

https://pypi.org/project/progress/1.5/ 

https://github.com/rsalmei/alive-progress 

https://pysimplegui.readthedocs.io/en/latest/ 

https://github.com/willmcgugan/rich