{:.2%}: 显示小数点后2位
print('percent: {:.2%}'.format(10/50))
percent: 25.00%
print('percent: {:.1%}'.format(10/50))
percent: 25.0%
print('percent: {:.0%}'.format(10/50))
percent: 25%
方式2:先格式化为float,再处理成%格式: {:.2f}%、{:.1f}%、 {:.0f}%
print('percent: {:.2f}%'.format(10/50*100))
percent: 25.00%
print('percent: {:.0f}%'.format(10/50*100))
percent: 25%
特别说明
方式二相对于方式一,把%提到{}外,但计算值的时候必须乘以100
#小智的智商从去年的100分提升到今年的132分,请计算小智智商提升的百分比,并用字符串格式化显示出“xx.x%”的形式,保留一位小数lastYearIQ = 100
thisYearIQ = 132
growthRateIQ = (thisYearIQ-lastYearIQ)/lastYearIQ
print('小智智商今年比去年提高了%.1f%%'%(growthRateIQ*100))
#输出:小智智商今年比去年提高了32.0%