ValueError:使用python导入json文件时出现额外数据错误 [英] ValueError: Extra Data error when importing json file using python

问题描述

我正在尝试构建一个将json文件导入到MongoDB中的python脚本.对于较大的json文件，脚本的这一部分将继续跳转到except ValueError.我认为这与逐行解析json文件有关，因为很小的json文件似乎可以正常工作.

I'm trying to build a python script that imports json files into a MongoDB. This part of my script keeps jumping to the except ValueError for larger json files. I think it has something to do with parsing the json file line by line because very small json files seem to work.

def read(jsonFiles):
from pymongo import MongoClient

client = MongoClient('mongodb://localhost:27017/')
db = client[args.db]

counter = 0
for jsonFile in jsonFiles:
    with open(jsonFile, 'r') as f:
        for line in f:
            # load valid lines (should probably use rstrip)
            if len(line) < 10: continue
            try:
                db[args.collection].insert(json.loads(line))
                counter += 1
            except pymongo.errors.DuplicateKeyError as dke:
                if args.verbose:
                    print "Duplicate Key Error: ", dke
            except ValueError as e:
                if args.verbose:
                    print "Value Error: ", e

                    # friendly log message
            if 0 == counter % 100 and 0 != counter and args.verbose: print "loaded line:", counter
            if counter >= args.max:
                break

我收到以下错误消息:

Value Error:  Extra data: line 1 column 10 - line 2 column 1 (char 9 - 20)
Value Error:  Extra data: line 1 column 8 - line 2 column 1 (char 7 - 18)

推荐答案

弄清楚了.似乎将其分解成几行是错误的.这是最终代码的样子.

Figured it out. Looks like breaking it up into lines was the mistake. Here's what the final code looks like.

counter = 0
for jsonFile in jsonFiles:
    with open(jsonFile) as f:
        data = f.read()
        jsondata = json.loads(data)
        try:
            db[args.collection].insert(jsondata)
            counter += 1

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