从.json文件获取特定数据，然后将其保存到python中的2D矩阵/字典中

Question

I am new at python and I have been trying to do some NLP on various .json files inside a folder. I have managed to get and print separately every entry from the dictionary using the key which is article get the description value. The thing is every time the loop executes I save the new data value to the same variable which is body1. What I find for some reason particularly difficult to do is save each data entry (each articles description) in a two dimensional matrix or a table of dictionaries if you which in order to be able to have all the entries there for future use. Something like :

body1 = ['file_name', 'description', 'file_name', 'description', 'file_name', 'description'] So if I need I will be able to print the second file's description using body1[name][description]. Now in every iteration the data from the last iteration are lost. I think that my C-configured was of thinking does now let me see the answer to that. I would appreciate any ideas.

Thank you in advance, George

   import os
   import glob
   import json
   import nltk
   from nltk.corpus import stopwords
   from nltk import PorterStemmer

   stop = stopwords.words('english')
   stemmer=PorterStemmer()

   for name in glob.glob('/Users/jorjis/Desktop/test/*'):
     jfile = open(name, 'r')
     values = json.load(jfile)
     jfile.close()
     body1 = values['article']['description']
     tokens = nltk.wordpunct_tokenize(body1)
     tokens = [w.lower() for w in tokens]
     vocab = [word for word in tokens if word not in stop]
     print body1

Answer 1

You need to ceate a list outside the loop and append the values.

final = [] # add values you want saved to final
uniq_ident = 1
for name in glob.glob('/Users/jorjis/Desktop/test/*'):
     jfile = open(name, 'r')
     values = json.load(jfile)
     jfile.close()
     body1 = values['article']['description']
     tokens = nltk.wordpunct_tokenize(body1)
     tokens = [w.lower() for w in tokens]
     vocab = [word for word in tokens if word not in stop]
     final.append([uniq_ident,vocab]) # append vocab or whatever values you want to keep
     uniq_ident += 1
     print body1

You can also use make final a dict with final = {} and use final[uniq_ident] = vocab

If you want to keep final a list and append a dict each time use:

 final.append({uniq_ident:vocab})