Python访问MongoDB,并且转换成Dataframe的方法


						如下所示：





#!/usr/bin/env python

# -*- coding: utf-8 -*-

# @Time : 2018/7/13 11:10

# @Author : baoshan

# @Site : 

# @File : pandans_pymongo.py

# @Software: PyCharm Community Edition



import pymongo

import pandas as pd





def _connect_mongo(host, port, username, password, db):

 """ A util for making a connection to mongo. """

 if username and password:

  mongo_uri = "mongodb://%s:%s@%s:%s/%s" % (username, password, host, port, db)

  conn = pymongo.MongoClient(mongo_uri)

 else:

  conn = pymongo.MongoClient(host, port)



 return conn[db]





def read_mongo(db, collection, query={}, host='test43', port=27017, username=None, password=None, no_id=True):

 """ Read from Mongo and Store into DataFrame. """



 # Connect to MongoDB

 db = _connect_mongo(host=host, port=port, username=username, password=password, db=db)



 # Make a query to the specific DB and Collection

 cursor = db[collection].find(query).limit(10)



 # Expand the cursor and construct the DataFrame

 df = pd.DataFrame(list(cursor))

 df.to_csv("abc.csv", encoding="utf_8_sig") # 处理中文乱码问题



 if no_id:

  del df['_id']



 return df





read_mongo(db='service', collection='trace_log_regular', query={}, host='xxx', port=27017, username="xxx", password="xxx")



小结：

1. 解决了pymongo访问MongoDB的问题

2. 解决了查询的数据转成dataframe的问题

3. 解决了dataframe写入到csv的问题

4. 解决了中文乱码问题。

以上这篇Python访问MongoDB,并且转换成Dataframe的方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持中文源码网。