用 python 的生成器制作数据传输进度条

整个过程中有几个数据

1  已经传输的数据received_size

2  文件大小tatol

a = received_size/tatol   b = a*100    其中 ,  a是已传输数据占总数据的百分比,   b就是已经传输的进度, 总进度为100

现在只要实现进度有更新就打印#

# _*_coding:utf-8_*_
# Author:Jaye He
import time


def show_progress(total):
        received_size = 0            # 已接收文件大小
        current_percent = 0          # 接收进度
        while received_size < total:
            if int((received_size/total)*100) > current_percent:
                print('#', end='', flush=True)
                current_percent = int((received_size/total)*100)
            received_size = yield


total = 100000                         # 文件总大小

# 启动生成器progress
progress = show_progress(total)
# 开始启动必须要用.__next__()启动,不能直接用send
# 否则出现TypeError: can't send non-None value to a just-started generator
progress.__next__()

received_size = 0                        # 模拟已接收的数据大小

# 模拟数据传输
while received_size < total:
    time.sleep(0.3)                      # 模拟每次传输数据花费的时间
    received_size += 1000                # 模拟每次传输数据的大小为1000
    try:                                 # 处理StopIteration异常
        progress.send(received_size)     # 给progress发送最新received_size
    except StopIteration as e:
        print('100%')

#################################################################################################100%      # 结果演示