正则表达式来自变量的字符串，而不是字符串文字

Question

import re

keyword = 'jesus'

re.search(r'\D*keyword', 'jesuscrhist')

我如何以'jesus'编译而不是'keyword'的方式将变量放在那里？

换句话说，我该如何组装：

keyword = "foobar"
some_string = "What's the difference between rebar and keyword?"

这样

assert(some_string == "What's the difference between rebar and fubar?")