Length of longest word in a list

Question

What is the more pythonic way of getting the length of the longest word:

len(max(words, key=len))

Or:

max(len(w) for w in words)

Answer 1

I know it's been a year now but neverthless, I came up with this:

'''Write a function find_longest_word() that takes a list of words and returns the length of the longest one.'''

a = ['mamao', 'abacate', 'pera', 'goiaba', 'uva', 'abacaxi', 'laranja', 'maca']

def find_longest_word(a):

    d = []
    for c in a:
        d.append(len(c))
        e = max(d)  #Try "min" :D
    for b in a:
        if len(b) == e:
            print "Length is %i for %s" %(len(b), b)