(增强型格式化字符串)str.format()

字符串格式化自2.6以后python提供更强大的函数str.format()

# 语法

用{}代替%

## EXP 1：简单例子,关键字映射

```python

x = 1

y = "shabi"

z = "wo shi {op1},{op2}".format(op1=y,op2=x)

print z

```

## EXP 2:转义{}

```python

x = 1

y = "shabi"

z = "wo shi {op}{{shit}}".format(op=y)

print z

```

## EXP3: 位置映射

```python

x = 1

y = "shabi"

z = "wo shi {0},{1},{0}".format(y,x)

print z

```

## EXP4: 列表(list,tuple)下表映射

```python

p = [‘shabi‘,1]

pp = [‘jiba‘,‘wanyi‘]

z = "wo shi {0[0]},{0[1]},{0[0]},{1[1]}".format(p,pp)

print z

```

## EXP5: 通过类属性？

```python

```

## EXP6: 用于进制转换

```python

print ‘{:b}‘.format(17)

print ‘{:o}‘.format(17)

print ‘{:d}‘.format(17)

print ‘{:x}‘.format(17)

```

来自为知笔记(Wiz)