如何在python中将包含elemet字符串的list转换为list

Question

输入

res=['QA9.1', 'QA4,QA12,QA15,QA16', 'QA9.1']

输出

res1=['QA9.1', 'QA4','QA12','QA15','QA16', 'QA9.1']

Answer 1

res = ['QA9.1', 'QA4,QA12,QA15,QA16', 'QA9.1']
res1 = list()
for item in res:
    res1.extend(item.split(','))
print(res1)