轉自：http://www.cnblogs.com/plwang1990/p/3757549.html
python print格式化輸出。
1. 列印字元串
print ("His name is %s"%("Aviad")) 效果：
2.列印整數
print ("He is %d years old"%(25)) 
3.列印浮點數
print ("His height is %f m"%(1.83)) 4.列印浮點數（指定保留小數點位數）
print ("His height is %.2f m"%(1.83)) 5.指定占位符寬度
print ("Name:%10s Age:%8d Height:%8.2f"%("Aviad",25,1.83)) 6.指定占位符寬度（左對齊）
print ("Name:%-10s Age:%-8d Height:%-8.2f"%("Aviad",25,1.83)) 7.指定占位符（隻能用0當占位符？）
print ("Name:%-10s Age:%08d Height:%08.2f"%("Aviad",25,1.83)) 8.科學計數法
format(0.0015,'.2e') print ("His name is %s"%("Aviad")) print ("He is %d years old"%(25)) print ("His height is %f m"%(1.83)) print ("His height is %.2f m"%(1.83)) print ("Name:%10s Age:%8d Height:%8.2f"%("Aviad",25,1.83)) print ("Name:%-10s Age:%-8d Height:%-8.2f"%("Aviad",25,1.83)) print ("Name:%-10s Age:%08d Height:%08.2f"%("Aviad",25,1.83)) format(0.0015,'.2e')