format函数用法python

在Python中，函数format()函数是用法(fa)一个非常实用的字符串格式化工具，它可以将指定的函数值插入到字符串的占位符位置，从而生成一个新的用法字符串。函数(shu)的(de)函数基本语法如(ru)下：（图(tu)片(pian)来源网络，侵删）

str.format(*args,用法 **kwargs)

*args表示可变(bian)数量的位置参(can)数(shu)，**kwargs表(biao)示可(ke)变数量的函数关(guan)键字参数，这些(xie)参数将被插入到字符串中的用法占位符位置。

下面是函数一些使用format()函数的示例：

1、基本用法

name = "张三"age = 25result = "我的用法名字是{ }，我{ }岁了。函数".format(name,用法 age)print(result) # 输出(chu)：我的名字是张三，我25岁了。函数(shu)

2、用法使用索引和关键(jian)字参数

result = "我的(de)函数名字是{ 0}，我{ 1}岁了。".format(name, age)print(result) # 输出：我的名字是张三，我25岁了(le)。

3、使(shi)用关键字参数

result = "我的名字是{ name}，我{ age}岁了。".format(name=name, age=age)print(result) # 输出：我的名字是张(zhang)三，我25岁了。

4、格式化数字和货币

pi = 3.1415926result = "圆周率的值约为{ :.2f}。".format(pi)print(result) # 输出：圆周率的值约为3.14。money = 123456789.987654321result = "金额为：{ :,.2f}".format(money)print(result) # 输出(chu)：金额为：1,234,567,899.88

5、对齐字符串

name = "张三"age = 25result = "{ :<10}{ :>5}".format(name, age)print(result) # 输出：张三 25

6、重复字符串

result = "{ :*<10}".format("Hello")print(result) # 输出(chu)：HelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHelloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHilloHallloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeloHeroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroHerroloorooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooododdooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddooddodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoodoododddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddoccccccccccccccccccccccccccccccccccccccccccccccccccccccccccoocococococococococococococococococococococococococococococococococococococococococccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffgggggggggggggggggggggggggggggggggggggggggggggggyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyoouuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuurrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrruunnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnoppppppppppppppppppppppppppppppppppppoqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqopmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmooopppoppoppoppoppoppopoppoppoppoppoppopopp" * 100)print(result) # 输出(chu)：