[Tutor] Slow program

[Diego Prestes]

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    Hello,

   Im trying to make a program that take a text and test whats the two words that apeer more in the text together, but when I do this code it is to slow. I think its because of that create many times the same text (var b), but I dont find any better program. Someone could give a hand?

Diego


def calc(b): 
    dic={}            
    for x in range(len(b)-1):
        if dic.has_key(b[x]+' '+b[x+1]) == 0:
            c = 0
            for y in range(len(b)-1):
                if b[x] == b[y] and b[x+1] == b[y+1]:
                    c=c+1
            dic[b[x]+' '+b[x+1]] = c
    ma=0
    for x in range(len(dic)):
        if dic.values()[x] > ma:
            ma = dic.values()[x]
    for x in range(len(dic)):
        if dic.values()[x] == ma:
            print "%s -> %d" % (dic.keys()[x],dic.values()[x])
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