python中，如何将字符串中多个空格分隔的修改为一个逗号？

Question

例如，有一个字符串"1 2 3 4 5 6 7"，我想修改成"1,2,3,4,5,6,7"，如何写python代码？谢谢

Answer 1

string = "word 2 3 4 5 6 7"
string = ",".join(string.split())本回答被提问者采纳

Answer 2

line = line.replace("\s",",")
(i.e. \s = \t\n)

Answer 3

line = "1 2 3 4 5 6 7"
line = line.replace(" ","")
for i in list(line):
print i+",",

不是最好,没有用到python的长处,汗,基本达到要求