如何得到百分数:
rate = float(2) * 100 / float(3.0)
print rate
rate1 = "%.0f%%" % rate
rate2 = "%.1f%%" % rate
rate3 = "%.2f%%" % rate
print rate1
print rate2
print rate3
rate = float(2) * 100 / float(3.0)
print rate
rate1 = "%.0f%%" % rate
rate2 = "%.1f%%" % rate
rate3 = "%.2f%%" % rate
print rate1
print rate2
print rate3