Python的进度条的制作

Posted 2020-11-10 NAVYSUMMER

 1 import sys,time
 2 #导入模块
 3 
 4 for i in range(50):
 5 #进度条的长度
 6     sys.stdout.write("#")
 7 #进度条的内容，这里要注意了，pycharm有可能不显示write的方法
 8     sys.stdout.flush()
 9 #刷新缓存
10     time.sleep(0.5)
11 #间隔时间，和shell的sleep差不多吧

 或者

import sys
 
class progressbar(object):
 
    def __init__(self, finalcount, block_char=‘.‘):
        self.finalcount = finalcount
        self.blockcount = 0
        self.block = block_char
        self.f = sys.stdout
        if not self.finalcount:
            return
        self.f.write(‘\n------------------ % Progress -------------------1\n‘)
        self.f.write(‘  1  2  3  4  5  6  7  8  9  0\n‘)
        self.f.write(‘----0----0----0----0----0----0----0----0----0----0\n‘)
 
    def progress(self, count):
        count = min(count, self.finalcount)
        if self.finalcount:
            percentcomplete = int(round(100.0 * count / self.finalcount))
            if percentcomplete < 1:
                percentcomplete = 1
        else:
            percentcomplete = 100
        blockcount = int(percentcomplete // 2)
        if blockcount <= self.blockcount:
            return
        for i in range(self.blockcount, blockcount):
            self.f.write(self.block)
        self.f.flush()
        self.blockcount = blockcount
        if percentcomplete == 100:
            self.f.write("\n")
 
if __name__ == "__main__":
    from time import sleep
    pb = progressbar(8, "*")
    for count in range(1, 9):
        pb.progress(count)
        sleep(0.2)
    pb = progressbar(100)
    pb.progress(20)
    sleep(0.3)
    pb.progress(47)
    sleep(0.3)
    pb.progress(90)
    sleep(0.3)
    pb.progress(100)
    print "testing 1:"
    pb = progressbar(1)
    pb.progress(1)

 或者：

# -*- coding: UTF-8 -*-

import sys, time

class ShowProcess():
    """
    显示处理进度的类
    调用该类相关函数即可实现处理进度的显示
    """
    i = 0 # 当前的处理进度
    max_steps = 0 # 总共需要处理的次数
    max_arrow = 50 #进度条的长度

    # 初始化函数，需要知道总共的处理次数
    def __init__(self, max_steps):
        self.max_steps = max_steps
        self.i = 0

    # 显示函数，根据当前的处理进度i显示进度
    # 效果为[>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>]100.00%
    def show_process(self, i=None):
        if i is not None:
            self.i = i
        else：
            self.i += 1
        num_arrow = int(self.i * self.max_arrow / self.max_steps) #计算显示多少个‘>‘
        num_line = self.max_arrow - num_arrow #计算显示多少个‘-‘
        percent = self.i * 100.0 / self.max_steps #计算完成进度，格式为xx.xx%
        process_bar = ‘[‘ + ‘>‘ * num_arrow + ‘-‘ * num_line + ‘]‘                      + ‘%.2f‘ % percent + ‘%‘ + ‘\r‘ #带输出的字符串，‘\r‘表示不换行回到最左边
        sys.stdout.write(process_bar) #这两句打印字符到终端
        sys.stdout.flush()

    def close(self, words=‘done‘):
        print ‘‘
        print words
        self.i = 0

if __name__==‘__main__‘:
    max_steps = 100

    process_bar = ShowProcess(max_steps)

    for i in range(max_steps + 1):
        process_bar.show_process()
        time.sleep(0.05)
    process_bar.close()

 或者：

from Tkinter import *

def resize(ev=None):
    label.config(font=‘Helvetica -%d bold‘ % scale.get())

top = Tk()
top.geometry()

label = Label(top, text = ‘hello world!‘, font = ‘Helvetica -12 bold‘)
label.pack(fill=Y,expand=1)

scale = Scale(top, from_=10, to=40, orient=HORIZONTAL, command=resize)
scale.set(12)
scale.pack(fill=X, expand=1)


quit = Button(top, text="QUIT", command=top.quit, activeforeground=‘white‘, activebackground=‘red‘)
quit.pack()

mainloop()