Question

我有一个带有json推文的txt文件，每条推文都在[＆＃34; text＆＃34;：＆amp; ＆＃34; is_quote_status＆＃34 ;:] 我已经设法提取了推文，现在我想逐行将打印输出写入csv。

import csv
with open('trumpT.csv', "wb") as csvfile:
    writer = csv.writer(trumpT.csv, delimiter=',')
with open('sim.txt', 'rb') as f:
    for line in f:
        line.split('"text" :')[1].split(', "is_quote_status')[0]
        writer.writerow(line)

错误 writer = csv.writer（trumpT.csv，delimiter =＆＃39;，＆＃39;） NameError：name＆＃39; trumpT＆＃39;未定义

我能够正确使用这部分，但csv无效吗？

with open('sim.txt', 'rb') as f:
    for line in f:
        print line.split('"text" :')[1].split(', "is_quote_status')[0]

Answer 1

试试这个：

import csv

with open("sim.txt", "r", newline='', encoding='utf8') as in_txt:
        in_reader = csv.reader(in_txt, delimiter = '\t')
        with open("trumpT.csv", "w", encoding='utf-8') as out_csv:
            out_writer = csv.writer(out_csv)
            for row in in_reader:
                row.split('"text" :')[1].split(', "is_quote_status')[0]
                out_writer.writerow(row)

Answer 2

使用with时，请注意直到需要该对象为止，

然后，Python将执行代码体，无论代码中发生什么，都要调用guard对象的 exit 方法。

所以你必须在with语句的主体中做所有事情您的代码应如下所示：

import csv
with open('trumpT.csv', "wb") as csvfile, open('sim.txt', 'rb') as f:       
    writer = csv.writer(trumpT.csv, delimiter=',')
    for line in f:
        line.split('"text" :')[1].split(', "is_quote_status')[0]
        writer.writerow(line)

来源：

http://effbot.org/zone/python-with-statement.htm https://docs.python.org/3/reference/compound_stmts.html#the-with-statement

Answer 3

使用Pandas。

可以简化此过程

考虑到/path/to/input.json或/path/to/input.txt有一个有效的json文件，文件扩展名并不重要，只要有效的json存在。

import pandas as pd

df = pd.read_json("path/to/input.txt")
df[["text", "created_at_date"]].to_csv("output.csv", index=False)

从.txt中提取数据并将其写入.csv

3 个答案: