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Date: Wed, 22 Aug 2012 04:42:55 +0100
From: Ian Foote <ian@feete.org>
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Xref: csiph.com comp.lang.python:27601

On 22/08/12 03:57, mingqiang hu wrote:
> can I use just one statement to figure out if substring =93a=94 ,"b" "c=
"=20
> are in string "adfbdfc" ? not use the statement like
>
> ("a" in "adfbdfc") or ( "b" in "adfbdfc") or ("c" in "adfbdfc" )=20
> ,because if I have lots of substring, this could sucks

This might not be the most efficient way, but:

 >>> set("abc") <=3D set("adfbdfc")
True
 >>> set("abce") <=3D set("adfbdfc")
False

If you want to check for substrings longer than one character, this=20
won't work. A solution then is to define a custom function:

def all_in(string, substrings):
for substring in substrings:
if substring not in string:
return False
return True

Ian