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Re: asking

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  Re: asking Ian Foote <ian@feete.org> - 2012-08-22 04:42 +0100
    Re: asking alex23 <wuwei23@gmail.com> - 2012-08-21 22:51 -0700

#27601 — Re: asking

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

This might not be the most efficient way, but:

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

If you want to check for substrings longer than one character, this 
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

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#27606

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

subs = ['a', 'b', 'c']
string = 'abcdef'

def all_in(string, substrings):
    return all(map(string.__contains__, subs))

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