How can I find the keys from a dictionary in a DNA sequence?

Question

[albamaria.muniesa]

I want to identify the keys from a dictionary (strings) in a DNA sequence(string or fasta).

How can I find the keys in the sequence and get? I've tried something like this:

def identification(ren, S):
    patternkeys = []
    for key in ren:
        if S in key:
            patternkeys.append(key)
    return patternKeys

patterns = []
patterns = identification(ren, S)
print patterns

#..............

ren is the dictionary and S the sequence

I need to get keys and values FOUND in the sequence.

Thanks

[David Fredman]

not terribly efficient, but you could modify the line

"if S in key" to use a regular expression that identifies key in S. See e.g. http://stackoverflow.com/questions/7345252/python-regex-match-words-in-string-and-get-count

Answer 1

[Cytosine]

Not really sure what you want to accomplish with this code of yours... An example input would be helpful.

But here's how you can get keys and values separately from a dictionary:

keys, values = dict.keys(), dict.values()

[albamaria.muniesa]

It's not necessary to get all the keys and values, only those found in the sequence.

Answer 2

[Giovanni M Dall'Olio]

Not sure if this is what you want, but this should do the trick:

patternkeys = [x for x in ren.keys() if ren[x] in S]

In any case, for this type of programming questions you should better ask in stackoverflow.