python格式化输出%s%d占位符的使用

1. 打印字符串

print ("His name is %s"%("Aviad"))

结果：His name is Aviad

2.打印整数

print ("He is %d years old"%(25))

结果：He is 25 years old

3.打印浮点数

print ("His height is %f m"%(1.83))

结果：His height is 1.830000 m

4.打印浮点数（指定保留小数点位数）

print ("His height is %.2f m"%(1.83))

结果：His height is 1.83 m

5.指定占位符宽度

print ("Name:%10s Age:%8d Height:%8.2f"%("Aviad",25,1.83))

结果：Name:     Aviad Age:      25 Height:    1.83

6.指定占位符宽度（左对齐）

print ("Name:%-10s Age:%-8d Height:%-8.2f"%("Aviad",25,1.83))

结果：Name:Aviad      Age:25       Height:1.83 

7.指定占位符（只能用0当占位符？）

print ("Name:%-10s Age:%08d Height:%08.2f"%("Aviad",25,1.83))

结果：Name:Aviad      Age:00000025 Height:00001.83

8.科学计数法

res = format(0.0015,'.2e')
print(res)

结果：1.50e-03