MONGO_DB = 'Test' MONGO_COLLECTION = 'test' client = pymongo.MongoClient(MONGO_URL).MONGO_DB.MONGO_COLLECTION datas = client.find({}, {"_id": 0}) with open(FILE, 'a', encoding="utf-8") as f: item = {} for data in datas: # 选择要导出的字段 item['title'] = data['title'] item['text'] = data['text'].strip() # ensure_ascii默认为True，导出时中文会出现乱码，所以有中文时这里应设置为False f.write(json.dumps(item, ensure_ascii=False) + "\n")

2.导出csv格式：

# encoding:utf-8
import pymongo
import csv
import codecs
FILE = "E:\\test.csv"
MONGO_URL = 'mongodb://127.0.0.1:27017'
MONGO_DB = 'Test'
MONGO_COLLECTION = 'test'
client = pymongo.MongoClient(MONGO_URL).MONGO_DB.MONGO_COLLECTION
datas = client.find({}, {"_id": 0})
with codecs.open(FILE, 'a', encoding='utf-8') as csvfile:
    writer = csv.writer(csvfile)
    # 设置csv头行，选择要导出的字段
    writer.writerow(["title", "text"])
    for data in datas:
        writer.writerow([data['title'], data['text']])

写入csv时，我使用的是codecs.open而不是open，这是因为我使用open打开时报了错误：UnicodeEncodeError编码错误，

使用codecs可以自动转换格式编码。

1.导出json格式# encoding:utf-8import pymongoimport jsonFILE = "E:\\test.json"MONGO_URL = 'mongodb://127.0.0.1:27017' MONGO_DB = 'Test'MONGO_COLLECTION = 'test' client = pymongo.MongoClient(MONGO_URL).MONGO_DB.MONGO_COLLECTIONdatas = client.find({}