Python列表，添加所有的單詞連在一起

Question

定列表

sentence = [ "Hello" , "World", "Today is a good", "Day"] 

輸出應該是平均水平的話，那麼1.75

我有這個迄今爲止

for k in len(line): // here i am trying to get position 0,1,2,3etc for k 
     total += len(line[k].split()) 
return total/len(line) 

的錯誤是：'int' object is not iterable，我在這個網站上看過同樣的問題，但仍然不明白是什麼問題。什麼是寫這個循環的更好方法？

Answer 1

遍歷的位置：

for k in range(len(line)): 

或者，直接遍歷句子片段：

for fragment in line: 
    total += len(fragment.split()) 

或者你可以用生成器表達式取代循環：

total = sum(len(fragment.split()) for fragment in line) 

Answer 2

替換

for k in len(line): 

與

for k in range(len(line)): 

Answer 3

你可以加入+分割，然後由列表

>>> sentence = [ "Hello" , "World", "Today is a good", "Day"] 
>>> float(len(" ".join(sentence).split()))/len(sentence) 
1.75 

在Python2，你需要讓他們中的一個浮動否則師截斷的長度除以。

Answer 4

鑑於你一句：

sentence = ["Hello", "World", "Today is a good", "Day"] 

你可以把它作爲一個班輪：

print(sum((len(word.split()) for word in sentence))/float(len(sentence))) 

但很容易理解它看看這段代碼：

sentence = ["Hello", "World", "Today is a good", "Day"] 
word_counts = [len(word.split()) for word in sentence] # make a list of word counts 
# [1, 1, 4, 1] 
print sum(word_counts)/float(len(sentence)) 
# 1.75