如何在python中解析`key1：val1，val2，val3，key2：val1，val2`？

Question

给定一个str作为key1:val1,val2,val3,key2:val11,val22，分割字符串的最有效方法是：

key1: ['val1', 'val2', 'val3']
key2: ['val11', 'val22']

谢谢

Answer 1

In [150]: answer = {}

In [151]: s = "key1:val1,val2,val3,key2:val11,val22"

In [152]: for pair in s.split(','):
    k, _, v = pair.rpartition(":")
    if k: key = k
    if key not in answer: answer[key] = []
    answer[key].append(v)
   .....:     

In [153]: for k,vals in answer.items():
    print(k, ":", vals)
   .....:     
key2 : ['val11', 'val22']
key1 : ['val1', 'val2', 'val3']