Testing if string contains a substring

[Klaus Alexander Seistrup]

Frantisek Fuka wrote:

> I want a simple test to see if str contains any occurences of substr.
> I am currently using this:
> 
> import string
> if string.find(str,substr) + 1:
>      ...do something...

If you're using a newer version of Python (2.2+?), you should be able
to do something like this:

#v+

>>> contains = lambda haystack, needle: haystack.find(needle) >= 0
>>> contains('foo bar fly', 'foo')
1
>>> contains('foo bar fly', 'xyz')
0
>>> 

#v-


  // Klaus

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