Find element's index in pandas Series

I know this is a very basic question but for some reason I can't find an answer. How can I get the index of certain element of a Series in python pandas? (first occurrence would suffice)

I.e., I'd like something like:

    import pandas as pd
    myseries = pd.Series([1,4,0,7,5], index=[0,1,2,3,4])
    print myseries.find(7) # should output 3

Certainly, it is possible to define such a method with a loop:

    def find(s, el):
        for i in s.index:
            if s[i] == el: 
                return i
        return None

    print find(myseries, 7)

but I assume there should be a better way. Is there?

    >>> myseries[myseries == 7]
    3    7
    dtype: int64
    >>> myseries[myseries == 7].index[0]

Though I admit that there should be a better way to do that, but this at least avoids iterating and looping through the object and moves it to the C level.