Is there any way to say ignore case with "in"?

[tinnews]

Is there any way in python to say

    if string1 in string2:
        <do something>

ignoring the case of string1 and string2? 


I know I could use:-

    if lower(string1) in lower(string2):
        <do something>

but it somehow feels there ought to be an easier (tidier?) way.

-- 
Chris Green
-- 
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