python在控制台输出进度条的方法

|#############################---------------------|59 percent done

class ProgressBar():  def __init__(self, width=50):    self.pointer = 0    self.width = width  def __call__(self,x):     # x in percent     self.pointer = int(self.width*(x/100.0))     return "|" + "#"*self.pointer + "-"*(self.width-self.pointer)+/        "|/n %d percent done" % int(x)

if __name__ == '__main__':  import time, os  pb = ProgressBar()  for i in range(101):    os.system('clear')    print pb(i)    time.sleep(0.1)