相关疑难解决方法(0)

我有一个字符串" Hello I am going to I with hello am".我想找出一个单词在字符串中出现的次数.示例hello发生2次.我试过这种方法只打印字符 -

def countWord(input_string):
    d = {}
    for word in input_string:
        try:
            d[word] += 1
        except:
            d[word] = 1

    for k in d.keys():
        print "%s: %d" % (k, d[k])
print countWord("Hello I am going to I with Hello am")

我想学习如何找到字数.