在python中将CSV文件转换为JSON

Question

所以我试图加载csvfile中的数据，将其转换为字典列表，然后将结果作为JSON保存到jsonfile。 这就是我现在所拥有的。 当我尝试打开并加载json文件时，出现“ ValueError：无法解码JSON对象”的提示！

def csv_to_json(csvfile, jsonfile):
    reader = csv.DictReader(csvfile.splitlines(), delimiter=' ', skipinitialspace=True,
                        fieldnames=['dept', 'code', 'section',
                                    'name', 'instructor', 'type','location])
    writer = csv.DictWriter(open(jsonfile,'wb'), fieldnames=reader.fieldnames)

Answer 1

尝试这个：

import json
import csv


def csv_to_json(csvfile, jsonfile):
    ''''''
    with open(csvfile, 'rb') as f:
       reader = csv.DictReader(f, delimiter=',', fieldnames=['head1', 'head2']) 
       open(jsonfile, 'w').write(json.dumps(list(reader)) # if your csv file is not very large                  

Answer 2

请记住，JSON与python对象/字典不同，请查看此答案
所以，你必须使用json.dumps进行编码，然后json.loads到回解码为有效的Python字典

Answer 3

我结束了，写任意的CSV：

import json
import csv

def csv_to_json(csvfile, jsonfile):
    """
    Read a CSV file and output it as JSON. Assumes the csv has a header row.
    """
    with open(csvfile, 'rU') as f:
        reader = csv.DictReader(f)
        data_dict = []
        for row in reader:
            data_dict.append(row)
        print(len(data_dict))
        with open(jsonfile, 'w') as g:
            json.dump(data_dict, g)