如何按句子编号和句子（用'|'分隔）写入CSV文件？

Question

我正在尝试读取一系列文件，从中提取文件ID和摘要。每个摘要的句子都应该写入一个CSV文件，内容包括文件ID、句子编号，以及用'|'分隔的句子。

有人告诉我使用NLTK的分词器。我已经安装了NLTK，但不知道怎么把它和我的代码结合起来。我的Python版本是3.2.2。下面是我的代码：

import re, os, sys
import csv
# Read into the list of files.
topdir = r'E:\Grad\LIS\LIS590 Text mining\Part1\Part1' # Topdir has to be an object rather than a string, which means that there is no paranthesis.
matches = []
for root, dirnames, filenames in os.walk(topdir):
    for filename in filenames:
        if filename.endswith(('.txt','.pdf')):
            matches.append(os.path.join(root, filename))

# Create a list and fill in the list with the abstracts. Every abstract is a string in the list.
capturedabstracts = []
for filepath in matches[:10]:  # Testing with the first 10 files.
    with open (filepath,'rt') as mytext:
    mytext=mytext.read()

        # code to capture files
    matchFile=re.findall(r'File\s+\:\s+(\w\d{7})',mytext)[0]
    capturedfiles.append(matchFile)


    # code to capture abstracts
    matchAbs=re.findall(r'Abstract\s+\:\s+(\w.+)'+'\n',mytext)[0]
    capturedabstracts.append(matchAbs)
    print (capturedabstracts)

with open('Abstract.csv', 'w') as csvfile:
writer = csv.writer(csvfile)
for data in capturedabstracts:
    writer.writerow([data])

我还是Python的初学者，可能无法理解你们的评论。如果你能提供带有修改代码的注释，那就太好了。

Answer 1

作为一个初步的尝试，可以看看一个句子分割工具，把文本分割成一个列表，然后用writerows把它存储到csv文件里：

with file(u'Abstract.csv','w') as outfile:
    sent_detector = nltk.data.load('tokenizers/punkt/english.pickle')
    list_of_sentences = sent_detector.tokenize(text.strip())
    writer = csv.DictWriter(outfile, headers = ['phrase'], delimiter = '|',  quotechar = None, quoting = csv.QUOTE_NONE, escapechar="\\")
    for phrase in list_of_sentences:
        phrasedict = {'phrase':phrase}
        writer.writerow(phrase)
    writer.close()

Answer 2

试试用 writerow 这个方法。

可以尝试这样做：

with open('Abstract.csv', 'w') as csvfile:
    writer = csv.writer(csvfile)
    for data in capturedabstracts:
        writer.writerow([data])