Python正则表达式字符串与不同的搜索字符串匹配

Question

Is there anyway in python to be able to perform:

"DDx" should match "01x", "10x", "11x, "00x"

in an elegant way in Python?

The easiest way I see to do this is by using regex, which in this case would be:
re.search('\\d\\dx',line)

Is there anyway to dynamically update this regex?
In case the input is:
"D0x" then regex: \\d0x

Please help.

Using Python 2.7

EDIT

In simpler terms, my question is:

>>> str = "DDx"
>>> str.replace('\d','D')
>>> re.search(<use str here>,line)

Or any alternate approach

Answer 1

I think I found the answer:

>>> s = "DDx"
>>> s = s.replace('D','\d')
>>> p = "01x"
>>> c = re.search(s,p)
>>> print c.group(0)
>>> "01x"