emmmmm,我是不是把简单的东西搞复杂了。

# -*- coding:utf-8 -*-

template = 'Life{0}{1},you{2}{3}。'

result = template.format(' is', ' short', ' need',' Python')

print(result)

template2 = 'Life{k}{i}{k}{s},you{k}{n}{k}{p}。'

i = 'is'

s = 'short'

n = 'need'

P = 'Python'

k = ' '

result2 = template2.format(i = i,s = s,n = n,p = P,k = k)

print(result2)