python 打印带数字的字符串 python如何打印字符串变量

python format 格式化函数

主要适用于带变量的字符串输出

1. 方法一

strs = {"you":"hello","me":"world"}
print('i want to say {you} {me}'.format(**strs))   # strs 必须为一个字典

输出：
i want to say hello world

2. 方法二

print('i want to say {you} {me}'.format(you = 'hello',me = 'world'))   # 可以直接赋值

输出：
i want to say hello world

3. 方法三

print('i want to say {} {}'.format('hello','world'))

输出：
i want to say hello world

4. 循环输出

for i in range(4):
    print("i want to say {} {}".format(i,i*2))

输出：
i want to say 0 0
i want to say 1 2
i want to say 2 4
i want to say 3 6

---