----------------------------------python调用MongoDB--------------------------------------
1.这里服务器环境是Debian8(ubuntu同下)，使用apt安装mongo
sudo apt-get install mongodb
2.安装python的mongo的模块
sudo pip3.5 install pymongo
如有不知道的命令可以使用 mongod --help 查看帮助手册
Options:
General options:
-h [ --help ] show this usage information
--version show version information
-f [ --config ] arg configuration file specifying additional
options
-v [ --verbose ] [=arg(=v)] be more verbose (include multiple times for
more verbosity e.g. -vvvvv)
--quiet quieter output
--port arg specify port number - 27017 by default
--bind_ip arg comma separated list of ip addresses to
listen on - all local ips by default
--maxConns arg max number of simultaneous connections -
1000000 by default
--logpath arg log file to send write to instead of stdout
- has to be a file, not directory
--syslog log to system's syslog facility instead of
file or stdout
--syslogFacility arg syslog facility used for monogdb syslog
message
--logappend append to logpath instead of over-writing
--timeStampFormat arg Desired format for timestamps in log
messages. One of ctime, iso8601-utc or
iso8601-local
--pidfilepath arg full path to pidfile (if not set, no pidfile
is created)
--keyFile arg private key for cluster authentication
--setParameter arg Set a configurable parameter
--httpinterface enable http interface
--clusterAuthMode arg Authentication mode used for cluster
authentication. Alternatives are
(keyFile|sendKeyFile|sendX509|x509)
--nounixsocket disable listening on unix sockets
--unixSocketPrefix arg alternative directory for UNIX domain
sockets (defaults to /tmp)
--fork fork server process
--auth run with security
--noauth run without security
--ipv6 enable IPv6 support (disabled by default)
--jsonp allow JSONP access via http (has security
implications)
--rest turn on simple rest api
--slowms arg (=100) value of slow for profile and console log
--profile arg 0=off 1=slow, 2=all
--cpu periodically show cpu and iowait utilization
--sysinfo print some diagnostic system information
--dbpath arg directory for datafiles - defaults to
/data/db
--directoryperdb each database will be stored in a separate
directory
--noIndexBuildRetry don't retry any index builds that were
interrupted by shutdown
--noprealloc disable data file preallocation - will often
hurt performance
--nssize arg (=16) .ns file size (in MB) for new databases
--quota limits each database to a certain number of
files (8 default)
--quotaFiles arg number of files allowed per db, implies
--quota
--smallfiles use a smaller default file size
--syncdelay arg (=60) seconds between disk syncs (0=never, but not
recommended)
--upgrade upgrade db if needed
--repair run repair on all dbs
--repairpath arg root directory for repair files - defaults
to dbpath
--noscripting disable scripting engine
--notablescan do not allow table scans
--journal enable journaling
--nojournal disable journaling (journaling is on by
default for 64 bit)
--journalOptions arg journal diagnostic options
--journalCommitInterval arg how often to group/batch commit (ms)
--shutdown kill a running server (for init scripts)
Replication options:
--oplogSize arg size to use (in MB) for replication op log.
default is 5% of disk space (i.e. large is
good)
Master/slave options (old; use replica sets instead):
--master master mode
--slave slave mode
--source arg when slave: specify master as <server:port>
--only arg when slave: specify a single database to
replicate
--slavedelay arg specify delay (in seconds) to be used when
applying master ops to slave
--autoresync automatically resync if slave data is stale
Replica set options:
--replSet arg arg is <setname>[/<optionalseedhostlist>]
--replIndexPrefetch arg specify index prefetching behavior (if
secondary) [none|_id_only|all]
Sharding options:
--configsvr declare this is a config db of a cluster;
default port 27019; default dir
/data/configdb
--shardsvr declare this is a shard db of a cluster;
default port 27018
SSL options:
--sslOnNormalPorts use ssl on configured ports
--sslMode arg set the SSL operation mode
(disabled|allowSSL|preferSSL|requireSSL)
--sslPEMKeyFile arg PEM file for ssl
--sslPEMKeyPassword arg PEM file password
--sslClusterFile arg Key file for internal SSL authentication
--sslClusterPassword arg Internal authentication key file password
--sslCAFile arg Certificate Authority file for SSL
--sslCRLFile arg Certificate Revocation List file for SSL
--sslWeakCertificateValidation allow client to connect without presenting a
certificate
--sslAllowInvalidHostnames Allow server certificates to provide
non-matching hostnames
--sslAllowInvalidCertificates allow connections to servers with invalid
certificates
--sslFIPSMode activate FIPS 140-2 mode at startup
Unix下启动mongo
mongod --dbpath .
进入Mongo方法：
mongo
3.测试python驱动
#coding=utf-8
"""
测试python驱动
"""
#引用对应的包
import pymongo
#创建一个mongo客户端对象
client = pymongo.MongoClient("127.0.0.1",27017)
#获得mongoDB中的数据库对象
db = client.test_database
#在数据库中创建一个集合
collection = db.test_collectionTwo
#创建一条要加入数据库中的数据信息,json格式
post_data = {"username":"xiaohao","pwd":"123456",}
#进行数据的添加操作,inserted_id返回添加后的id编号信息
post_data_id = collection.insert_one(post_data).inserted_id
#展示一下插入的数据信息
print collection.find_one()
#打印当前数据库中所有集合的民称
print db.collection_names()
#打印当前集合中数据的信息
for item in collection.find():
print item
#打印当前集合中数据的个数
print collection.count()
#进行find查询，并打印查询到的数据的条数
print collection.find({"username":"xiaohao"}).count()
4.Aggregation Examples：mongoDB聚合练习
#coding=utf-8
'''
进行聚合aggregation 练习
'''
#引包
import pymongo
client = pymongo.MongoClient("127.0.0.1",27017)
db = client.aggregation_database
collection = db.aggregation_collection
collection.insert_many([
{"username":"xiaohao01","pwd":"111"},
{"username":"xiaohao02","pwd":"222"},
{"username":"xiaohao03","pwd":"333"}
])
# for item in collection.find():
# print item
#python中不含有son语法，需要使用son
from bson.son import SON
pipeline = [
{"$unwind":"$pwd"},
{"$group":{"_id":"pwd","count":{"$sum":1}}},
{"$sort":SON([("count",-1),("_id",-1)])}
]
result = list(collection.aggregate(pipeline))
print result