python报错-（ValueError: must have exactly one of create/read/write/append mode)

with open('11.html','rw',encoding='utf-8') as f:
    f.write(response.text)

Traceback (most recent call last):
File “<stdin>”, line 1, in <module>
ValueError: must have exactly one of create/read/write/append mode

with open('11.html','w+',encoding='utf-8') as f:
    f.write(response.text)

python中的open函数没有rw这个参数，如果需要又读又写，可以使用r+或者w+来代替。