python之我做了一个Python 'robber' s语言的翻译程序，是否正确

所以我只是 python 的菜鸟，我正在做这个练习:

"Write a function translate() that will translate a text into "rövarspråket" (Swedish for "robber's language"). That is, double every consonant and place an occurrence of "o" in between. For example, translate("this is fun") should return the string "tothohisos isos fofunon"."

我能够做到这里是我的代码:

def translate (var1): 
    vaw = ['b','c','d','f','g','h','j','k','l','m','n','p','q','r','s','t','v','w','x','z'] 
    var1 = list(var1) 
    for string  in var1: 
        if string == string in vaw: 
           var1[var1.index(string)] = string + 'o' + string 
    print ''.join(var1) 

我想知道这是否正确，或者是否有另一种方法可以用更少的代码来做到这一点？