算法题：按字符串中的数字大小排序，python实现

要求：给定一个句子，句子中的每个单词都包含一个数字，要求根据该数字大小对原句子重新排序。

测试用例如下：

"pyt3hon h1as s5ome po7wer functi9ons"  --> "h1as pyt3hon s5ome po7wer functi9ons"

"pytho1n i6s pow2erful"  --> "pytho1n pow2erful i6s"

"" --> ""

 python 一行代码实现，解决问题的关键思路是提取出每个单词的数字

import re
def sortSentence(sentence):
	if sentence is "":
		return sentence

	return ' '.join(sorted(sentence.split(), key=lambda x:re.findall(r"\d+\.?\d*", x))) 


if __name__ == '__main__':
	sentence1 = "pyt3hon h1as s5ome po7wer functi9ons"
	sentence2 = "pytho1n i6s pow2erful"

	print(sortSentence(sentence1))
	print(sortSentence(sentence2))
	print(sortSentence(""))