[Tutor] need idea

[invincible patriot]

thanks
let me clear you that what i am trying to do
suppose we hav a input string and a dict
our_dict={'a':'u', 't':'a', 'c':'g', 'g':'c'}
input_string='atcg'


now what i wana do is that where ever we are having 'a' i wana replace it with 'u', 't' with 'a' and so on
i tried using input_string.replace('a', 'u')
but it is replacing only one character
i wana replace these 4 characters according to the dictionary

i hope it is now clear

kindly let me know how to proceed now


> From: andreengels at gmail.com
> Date: Wed, 10 Feb 2010 23:10:38 +0100
> Subject: Re: [Tutor] need idea
> To: invincible_patriot at hotmail.com
> CC: tutor at python.org
> 
> On Wed, Feb 10, 2010 at 10:27 PM, invincible patriot
> <invincible_patriot at hotmail.com> wrote:
> > hi
> > i want to compare a string with a dictionary
> > or u can say that i want to take user input A STRING, and want to compare
> > each character of that string with the KEYS  in the dictionary, and then i
> > wana print the values for the characters that are present in that strinng
> > that we got as the input and were present in the dictionary as well
> >
> > can you please give me some idea how to do that
> >
> > what i hav done is that
> > 1) I have made a dictionary with the keys and the values
> > 2) I have taken the input from the user and hav saved it into a variable
> >
> > not i wana compare string that was given to us and replace them with the
> > values given in the dictionary
> 
> It's not yet completely clear to me what you want, but the following
> should help you:
> 
> Let str be the string, and dict the dictionary, then:
> 
> [c for c in str if c in dict]
> 
> will give you the characters in the string that are keys in the dictionary.
> 
> 
> 
> 
> -- 
> André Engels, andreengels at gmail.com
 		 	   		  
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