字典与Python中不同类型的数组作为值 [英] Dictionary with array of different types as value in Python

问题描述

我正在学习Python，我有一本这样的字典：

  category = {World news：[0] ，政治：[0]，...} 
  

文件。每篇文章都有一个类别。所以我想要0我必须每个键增加1，当一个类别满足，并增加数组每个键与它发现的文章。所以输出将是：

  category = {世界新闻：[2，foo bla content of，content第二篇]，
政治：[1，只有1篇文章]，
 ... 
} 
  pre> 
 
 
这是我现在所在的：
  iter_reader：
 category [row [4]] [0] = category [row [4]] [0] + 1 
 category [row [4]]。append（category [row [3]] ）
  
但我认为它将文章解释为关键字，并引发相关错误：
 
 
文件./wordCloud.py，第41行，
 category [row [4]]。append（category [row [3 ]]）
 KeyError：当苹果公司在2010年1月推出时。
 
 
 
 
 
 
 
 
 行[4] 是文章的类别。 
  row [3] 是本文的内容。
 
 
 
正如Bryan Oakley所说，不需要一个柜台，所以我现在正在这个方向思考... 
解决方案
在第三行，你是附加 category [row [3]] 您应该可以简单地附加 row [3] 。您目前正在使用 row [3] 作为类别列表的索引，但我怀疑行[3] 是实际上你想追加的内容。
 
I am learning Python and I have a dictionary like this:
category = { "World news": [0], "Politics": [0], ... }
where now I am reading articles from a file. Every article has a category. So I would like the 0 I have to every key to be incremented by 1 when a category is meet and to augment the array every key has with the article it found. So the output would be:
category = {  "World news": [2, "foo bla content of", "content of 2nd article"],
              "Politics": [1, "only 1 article here"],
              ...
}
Here is what I have now:
for row in iter_reader:
    category[row[4]][0] = category[row[4]][0] + 1
    category[row[4]].append(category[row[3]])
but I think it interprets an article as a key and throws a relevant error:

  
File "./wordCloud.py", line 41, in 
      category[row[4]].append(category[row[3]])
  KeyError: 'When Apple unveiled its in January 2010..
Any ideas please?



row[4] is the category of the article.
row[3] is the content of the article.

As Bryan Oakley said, I do not need to keep a counter, so I am now thinking in this direction...
解决方案
In the third line, you are appending category[row[3]] where you should probably be appending simply row[3]. You are currently using row[3] as an index for the category list, but I suspect row[3] is actually the content you want to append.

                        
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