com! -nargs=+ Dict call Dict(<f-args>)

fun! Dict(...)
    if !has('python')
        echohl ErrorMsg | echo 'python is not supported!' | echohl None
        return
    endif
python <<EOF
try:
    import vim
    from urllib2 import urlopen
    from urllib import urlencode
    search = ' '.join(vim.eval('a:000'))
    langpair = 'en|zh' if search[0].isalpha() else 'zh|en'
    base_url = 'http://ajax.googleapis.com/ajax/services/language/translate?'
    params = urlencode({'v':'1.0', 'q':search, 'langpair':langpair})
    url = base_url+params
    content = urlopen(url).read()
    start_idx = content.find('"translatedText":"')+18
    end_idx = content.find('"}, "', start_idx)
    translation = content[start_idx:end_idx]
    print translation
except Exception, e:
    print e
EOF
endfun