在Python

Question

发现列表中的所有单词的字符数

我试图找到字符的单词列表总数，特别是这个名单：

words = ["alpha","omega","up","down","over","under","purple","red","blue","green"] 

我试着这样做：

print "The size of the words in words[] is %d." % len(words) 

但只是告诉我有多少话是在列表中，这是10

任何帮助，将不胜感激！

对不起，我打算提到我正在做这个的类是for循环的主题，所以我想知道如果我必须实现一个forloop给我一个答案，这就是为什么for循环标签在那里。

Answer 1

您可以在列表解析中使用len功能，这将只是sum使用生成器表达式

>>> sum(len(i) for i in words) 
43 

创建长度

>>> words = ["alpha","omega","up","down","over","under","purple","red","blue","green"] 
>>> [len(i) for i in words] 
[5, 5, 2, 4, 4, 5, 6, 3, 4, 5] 

然后列表如果你真的有你的心脏集在for环路上。

total = 0 
for word in words: 
    total += len(word) 

>>> print total 
43