function for a single string number of syllables

[tebirkes]

I have a function who takes a single string as argument and returns the number of syllables of some string e.g. str = "I eat pancakes"
But i do not get the correct number of syllables what do I do wrong here? 
I use regular expression module and already got a pattern that describes the syllables in some text

def count_syllables(str):
    pattern = re.compile("[aiouy]+e*|e(?!d\b|ly)[aiouye]?|[td]ed|le\b")

    match_new = pattern.match(str.lower())
    if match_new:
        print len(string)

[micseydel]

Please make sure to post your real code and its desired vs actual output; this code results in a NameError, which doesn't seem to be your question.

As to solving your problem, you need to start simple and build from there. Handle the simple case, don't worry about y. Verify that that works, create tests cases that correctly pass and fail. Once you're confident about that, then create test cases for y and modify your code to handle those cases, while also continuing to handle the old tests as well.

[Larz60+]

You may want to look at the tokenize section of NLTK here.