python 串行執(zhí)行和并行執(zhí)行實例
更新時間：2020年04月30日 09:38:27 作者：zhaoyangjian724
這篇文章主要介紹了python 串行執(zhí)行和并行執(zhí)行實例，具有很好的參考價值，希望對大家有所幫助。一起跟隨小編過來看看吧
我就廢話不多說了，大家還是直接看代碼吧！
#coding=utf-8
import threading
import time
import cx_Oracle
from pprint import pprint
import csv
print time.asctime()
table_name = "dbtest.csv"
f = open(table_name + ".csv", "w")
conn = cx_Oracle.connect('tlcbuser/tlcbuser@20.5.101.31/tlyy')
cursor = conn.cursor()
def query01():
tname = threading.current_thread()
aa=10
# cursor.execute("SELECT * FROM TEST100 WHERE ID = %s", [aa])
cursor.prepare("""SELECT * FROM TEST100 WHERE ID=:id""")
cursor.execute(None,{'id':aa})
row = cursor.fetchall()
print row
return row
cursor.close()
def query02():
tname = threading.current_thread()
aa=20
# cursor.execute("SELECT * FROM TEST100 WHERE ID = %s", [aa])
cursor.prepare("""SELECT * FROM TEST100 WHERE ID=:id""")
cursor.execute(None,{'id':aa})
row = cursor.fetchall()
print row
return row
cursor.close()
def query03():
tname = threading.current_thread()
aa=30
# cursor.execute("SELECT * FROM TEST100 WHERE ID = %s", [aa])
cursor.prepare("""SELECT * FROM TEST100 WHERE ID=:id""")
cursor.execute(None,{'id':aa})
row = cursor.fetchall()
print row
return row
cursor.close()
def query04():
tname = threading.current_thread()
aa=40
# cursor.execute("SELECT * FROM TEST100 WHERE ID = %s", [aa])
cursor.prepare("""SELECT * FROM TEST100 WHERE ID=:id""")
cursor.execute(None,{'id':aa})
row = cursor.fetchall()
print row
return row
def query05():
tname = threading.current_thread()
aa=50
# cursor.execute("SELECT * FROM TEST100 WHERE ID = %s", [aa])
cursor.prepare("""SELECT * FROM TEST100 WHERE ID=:id""")
cursor.execute(None,{'id':aa})
row = cursor.fetchall()
print row
return row
cursor.close()
def query06():
tname = threading.current_thread()
aa=60
# cursor.execute("SELECT * FROM TEST100 WHERE ID = %s", [aa])
cursor.prepare("""SELECT * FROM TEST100 WHERE ID=:id""")
cursor.execute(None,{'id':aa})
row = cursor.fetchall()
print row
return row
cursor.close()
def query07():
tname = threading.current_thread()
aa=70
# cursor.execute("SELECT * FROM TEST100 WHERE ID = %s", [aa])
cursor.prepare("""SELECT * FROM TEST100 WHERE ID=:id""")
cursor.execute(None,{'id':aa})
row = cursor.fetchall()
return row
cursor.close()
def query08():
tname = threading.current_thread()
aa=80
# cursor.execute("SELECT * FROM TEST100 WHERE ID = %s", [aa])
cursor.prepare("""SELECT * FROM TEST100 WHERE ID=:id""")
cursor.execute(None,{'id':aa})
row = cursor.fetchall()
print row
return row
cursor.close()
def query09():
tname = threading.current_thread()
aa=90
# cursor.execute("SELECT * FROM TEST100 WHERE ID = %s", [aa])
cursor.prepare("""SELECT * FROM TEST100 WHERE ID=:id""")
cursor.execute(None,{'id':aa})
row = cursor.fetchall()
print row
return row
cursor.close()
def query10():
tname = threading.current_thread()
aa=100
# cursor.execute("SELECT * FROM TEST100 WHERE ID = %s", [aa])
cursor.prepare("""SELECT * FROM TEST100 WHERE ID=:id""")
cursor.execute(None,{'id':aa})
row = cursor.fetchall()
print row
return row
cursor.close()
threads = []
t1 = threading.Thread(target=query01, name='query01')
threads.append(t1)
t2 = threading.Thread(target=query02, name='query02')
threads.append(t2)
t2 = threading.Thread(target=query03, name='query03')
threads.append(t2)
t2 = threading.Thread(target=query04, name='query04')
threads.append(t2)
t2 = threading.Thread(target=query05, name='query05')
threads.append(t2)
t2 = threading.Thread(target=query06, name='query06')
threads.append(t2)
t2 = threading.Thread(target=query07, name='query07')
threads.append(t2)
t2 = threading.Thread(target=query08, name='query08')
threads.append(t2)
t2 = threading.Thread(target=query09, name='query09')
threads.append(t2)
t2 = threading.Thread(target=query10, name='query10')
threads.append(t2)
if __name__ == '__main__':
for t in threads:
# t.setDaemon(True)
t.start()
# t.run()
# t.start()
# print '3333333'
print threading.current_thread()
# print t.is_alive()
# print '3333333'
t.join()
print "all over "
print time.asctime()
C:\Python27\python.exe C:/Users/tlcb/PycharmProjects/untitled/a2.py
Wed Mar 28 11:08:19 2018
<_MainThread(MainThread, started 18744)>
[(10, '10boobook10', '10aaaaaaaaaaaa10', '10bbbbbbbbbbbbbbbbb10'), (10, '10sssssssss10', 'tlcb', 'tlcb'), (10, '10boobook10', '10aaaaaaaaaaaa10', '10bbbbbbbbbbbbbbbbb10')]
<_MainThread(MainThread, started 18744)>
[(20, '20boobook20', '20aaaaaaaaaaaa20', '20bbbbbbbbbbbbbbbbb20'), (20, '20boobook20', '20aaaaaaaaaaaa20', '20bbbbbbbbbbbbbbbbb20'), (20, '20boobook20', '20aaaaaaaaaaaa20', '20bbbbbbbbbbbbbbbbb20')]
<_MainThread(MainThread, started 18744)>
[(30, '30boobook30', '30aaaaaaaaaaaa30', '30bbbbbbbbbbbbbbbbb30'), (30, '30boobook30', '30aaaaaaaaaaaa30', '30bbbbbbbbbbbbbbbbb30'), (30, '30boobook30', '30aaaaaaaaaaaa30', '30bbbbbbbbbbbbbbbbb30')]
<_MainThread(MainThread, started 18744)>
[(40, '40boobook40', '40aaaaaaaaaaaa40', '40bbbbbbbbbbbbbbbbb40'), (40, '40boobook40', '40aaaaaaaaaaaa40', '40bbbbbbbbbbbbbbbbb40'), (40, '40boobook40', '40aaaaaaaaaaaa40', '40bbbbbbbbbbbbbbbbb40')]
<_MainThread(MainThread, started 18744)>
[(50, '50boobook50', '50aaaaaaaaaaaa50', '50bbbbbbbbbbbbbbbbb50'), (50, '50boobook50', '50aaaaaaaaaaaa50', '50bbbbbbbbbbbbbbbbb50'), (50, '50boobook50', '50aaaaaaaaaaaa50', '50bbbbbbbbbbbbbbbbb50')]
<_MainThread(MainThread, started 18744)>
[(60, '60boobook60', '60aaaaaaaaaaaa60', '60bbbbbbbbbbbbbbbbb60'), (60, '60boobook60', '60aaaaaaaaaaaa60', '60bbbbbbbbbbbbbbbbb60'), (60, '60boobook60', '60aaaaaaaaaaaa60', '60bbbbbbbbbbbbbbbbb60')]
<_MainThread(MainThread, started 18744)>
<_MainThread(MainThread, started 18744)>
[(80, '80boobook80', '80aaaaaaaaaaaa80', '80bbbbbbbbbbbbbbbbb80'), (80, '80boobook80', '80aaaaaaaaaaaa80', '80bbbbbbbbbbbbbbbbb80'), (80, '80boobook80', '80aaaaaaaaaaaa80', '80bbbbbbbbbbbbbbbbb80')]
<_MainThread(MainThread, started 18744)>
[(90, '90boobook90', '90aaaaaaaaaaaa90', '90bbbbbbbbbbbbbbbbb90'), (90, '90boobook90', '90aaaaaaaaaaaa90', '90bbbbbbbbbbbbbbbbb90'), (90, '90boobook90', '90aaaaaaaaaaaa90', '90bbbbbbbbbbbbbbbbb90')]
<_MainThread(MainThread, started 18744)>
[(100, '100boobook100', '100aaaaaaaaaaaa100', '100bbbbbbbbbbbbbbbbb100'), (100, '100boobook100', '100aaaaaaaaaaaa100', '100bbbbbbbbbbbbbbbbb100'), (100, '100boobook100', '100aaaaaaaaaaaa100', '100bbbbbbbbbbbbbbbbb100')]
all over
Wed Mar 28 11:08:34 2018
Process finished with exit code 0
這個時候是串行 花費了15秒
多線程跑:
#coding=utf-8
import threading
import time
import cx_Oracle
from pprint import pprint
import csv
print time.asctime()
table_name = "dbtest.csv"
f = open(table_name + ".csv", "w")
def query01():
tname = threading.current_thread()
aa=10
conn = cx_Oracle.connect('tlcbuser/tlcbuser@20.5.101.31/tlyy')
cursor = conn.cursor()
# cursor.execute("SELECT * FROM TEST100 WHERE ID = %s", [aa])
cursor.prepare("""SELECT * FROM TEST100 WHERE ID=:id""")
cursor.execute(None,{'id':aa})
row = cursor.fetchall()
print row
return row
cursor.close()
conn.close()
def query02():
tname = threading.current_thread()
aa=20
conn = cx_Oracle.connect('tlcbuser/tlcbuser@20.5.101.31/tlyy')
cursor = conn.cursor()
# cursor.execute("SELECT * FROM TEST100 WHERE ID = %s", [aa])
cursor.prepare("""SELECT * FROM TEST100 WHERE ID=:id""")
cursor.execute(None,{'id':aa})
row = cursor.fetchall()
print row
return row
cursor.close()
conn.close()
def query03():
tname = threading.current_thread()
aa=30
conn = cx_Oracle.connect('tlcbuser/tlcbuser@20.5.101.31/tlyy')
cursor = conn.cursor()
# cursor.execute("SELECT * FROM TEST100 WHERE ID = %s", [aa])
cursor.prepare("""SELECT * FROM TEST100 WHERE ID=:id""")
cursor.execute(None,{'id':aa})
row = cursor.fetchall()
print row
return row
cursor.close()
conn.close()
def query04():
conn = cx_Oracle.connect('tlcbuser/tlcbuser@20.5.101.31/tlyy')
cursor = conn.cursor()
tname = threading.current_thread()
aa=40
# cursor.execute("SELECT * FROM TEST100 WHERE ID = %s", [aa])
cursor.prepare("""SELECT * FROM TEST100 WHERE ID=:id""")
cursor.execute(None,{'id':aa})
row = cursor.fetchall()
print row
return row
cursor.close()
conn.close()
def query05():
conn = cx_Oracle.connect('tlcbuser/tlcbuser@20.5.101.31/tlyy')
cursor = conn.cursor()
tname = threading.current_thread()
aa=50
# cursor.execute("SELECT * FROM TEST100 WHERE ID = %s", [aa])
cursor.prepare("""SELECT * FROM TEST100 WHERE ID=:id""")
cursor.execute(None,{'id':aa})
row = cursor.fetchall()
print row
return row
cursor.close()
conn.close()
def query06():
conn = cx_Oracle.connect('tlcbuser/tlcbuser@20.5.101.31/tlyy')
cursor = conn.cursor()
tname = threading.current_thread()
aa=60
# cursor.execute("SELECT * FROM TEST100 WHERE ID = %s", [aa])
cursor.prepare("""SELECT * FROM TEST100 WHERE ID=:id""")
cursor.execute(None,{'id':aa})
row = cursor.fetchall()
print row
return row
cursor.close()
conn.close()
def query07():
conn = cx_Oracle.connect('tlcbuser/tlcbuser@20.5.101.31/tlyy')
cursor = conn.cursor()
tname = threading.current_thread()
aa=70
# cursor.execute("SELECT * FROM TEST100 WHERE ID = %s", [aa])
cursor.prepare("""SELECT * FROM TEST100 WHERE ID=:id""")
cursor.execute(None,{'id':aa})
row = cursor.fetchall()
return row
cursor.close()
conn.close()
def query08():
conn = cx_Oracle.connect('tlcbuser/tlcbuser@20.5.101.31/tlyy')
cursor = conn.cursor()
tname = threading.current_thread()
aa=80
# cursor.execute("SELECT * FROM TEST100 WHERE ID = %s", [aa])
cursor.prepare("""SELECT * FROM TEST100 WHERE ID=:id""")
cursor.execute(None,{'id':aa})
row = cursor.fetchall()
print row
return row
cursor.close()
conn.close()
def query09():
conn = cx_Oracle.connect('tlcbuser/tlcbuser@20.5.101.31/tlyy')
cursor = conn.cursor()
tname = threading.current_thread()
aa=90
# cursor.execute("SELECT * FROM TEST100 WHERE ID = %s", [aa])
cursor.prepare("""SELECT * FROM TEST100 WHERE ID=:id""")
cursor.execute(None,{'id':aa})
row = cursor.fetchall()
print row
return row
cursor.close()
conn.close()
def query10():
conn = cx_Oracle.connect('tlcbuser/tlcbuser@20.5.101.31/tlyy')
cursor = conn.cursor()
tname = threading.current_thread()
aa=100
# cursor.execute("SELECT * FROM TEST100 WHERE ID = %s", [aa])
cursor.prepare("""SELECT * FROM TEST100 WHERE ID=:id""")
cursor.execute(None,{'id':aa})
row = cursor.fetchall()
print row
return row
cursor.close()
conn.close()
threads = []
t1 = threading.Thread(target=query01, name='query01')
threads.append(t1)
t2 = threading.Thread(target=query02, name='query02')
threads.append(t2)
t2 = threading.Thread(target=query03, name='query03')
threads.append(t2)
t2 = threading.Thread(target=query04, name='query04')
threads.append(t2)
t2 = threading.Thread(target=query05, name='query05')
threads.append(t2)
t2 = threading.Thread(target=query06, name='query06')
threads.append(t2)
t2 = threading.Thread(target=query07, name='query07')
threads.append(t2)
t2 = threading.Thread(target=query08, name='query08')
threads.append(t2)
t2 = threading.Thread(target=query09, name='query09')
threads.append(t2)
t2 = threading.Thread(target=query10, name='query10')
threads.append(t2)
if __name__ == '__main__':
for t in threads:
# t.setDaemon(True)
t.start()
# t.run()
# t.start()
# print '3333333'
print threading.current_thread()
# print t.is_alive()
# print '3333333'
t.join()
print "all over "
print time.asctime()
C:\Python27\python.exe C:/Users/tlcb/PycharmProjects/untitled/a2.py
Wed Mar 28 11:12:47 2018
<_MainThread(MainThread, started 22500)>
<_MainThread(MainThread, started 22500)>
<_MainThread(MainThread, started 22500)>
<_MainThread(MainThread, started 22500)>
<_MainThread(MainThread, started 22500)>
<_MainThread(MainThread, started 22500)>
<_MainThread(MainThread, started 22500)>
<_MainThread(MainThread, started 22500)>
<_MainThread(MainThread, started 22500)>
<_MainThread(MainThread, started 22500)>
[(40, '40boobook40', '40aaaaaaaaaaaa40', '40bbbbbbbbbbbbbbbbb40'), (40, '40boobook40', '40aaaaaaaaaaaa40', '40bbbbbbbbbbbbbbbbb40'), (40, '40boobook40', '40aaaaaaaaaaaa40', '40bbbbbbbbbbbbbbbbb40')]
[(60, '60boobook60', '60aaaaaaaaaaaa60', '60bbbbbbbbbbbbbbbbb60'), (60, '60boobook60', '60aaaaaaaaaaaa60', '60bbbbbbbbbbbbbbbbb60'), (60, '60boobook60', '60aaaaaaaaaaaa60', '60bbbbbbbbbbbbbbbbb60')]
[(80, '80boobook80', '80aaaaaaaaaaaa80', '80bbbbbbbbbbbbbbbbb80'), (80, '80boobook80', '80aaaaaaaaaaaa80', '80bbbbbbbbbbbbbbbbb80'), (80, '80boobook80', '80aaaaaaaaaaaa80', '80bbbbbbbbbbbbbbbbb80')]
[(50, '50boobook50', '50aaaaaaaaaaaa50', '50bbbbbbbbbbbbbbbbb50'), (50, '50boobook50', '50aaaaaaaaaaaa50', '50bbbbbbbbbbbbbbbbb50'), (50, '50boobook50', '50aaaaaaaaaaaa50', '50bbbbbbbbbbbbbbbbb50')]
[(10, '10boobook10', '10aaaaaaaaaaaa10', '10bbbbbbbbbbbbbbbbb10'), (10, '10sssssssss10', 'tlcb', 'tlcb'), (10, '10boobook10', '10aaaaaaaaaaaa10', '10bbbbbbbbbbbbbbbbb10')]
[(20, '20boobook20', '20aaaaaaaaaaaa20', '20bbbbbbbbbbbbbbbbb20'), (20, '20boobook20', '20aaaaaaaaaaaa20', '20bbbbbbbbbbbbbbbbb20'), (20, '20boobook20', '20aaaaaaaaaaaa20', '20bbbbbbbbbbbbbbbbb20')]
[(30, '30boobook30', '30aaaaaaaaaaaa30', '30bbbbbbbbbbbbbbbbb30'), (30, '30boobook30', '30aaaaaaaaaaaa30', '30bbbbbbbbbbbbbbbbb30'), (30, '30boobook30', '30aaaaaaaaaaaa30', '30bbbbbbbbbbbbbbbbb30')]
[(100, '100boobook100', '100aaaaaaaaaaaa100', '100bbbbbbbbbbbbbbbbb100'), (100, '100boobook100', '100aaaaaaaaaaaa100', '100bbbbbbbbbbbbbbbbb100'), (100, '100boobook100', '100aaaaaaaaaaaa100', '100bbbbbbbbbbbbbbbbb100')]
[(90, '90boobook90', '90aaaaaaaaaaaa90', '90bbbbbbbbbbbbbbbbb90'), (90, '90boobook90', '90aaaaaaaaaaaa90', '90bbbbbbbbbbbbbbbbb90'), (90, '90boobook90', '90aaaaaaaaaaaa90', '90bbbbbbbbbbbbbbbbb90')]
all over
Wed Mar 28 11:12:55 2018
Process finished with exit code 0
此時花了 8秒
補充知識：python logging定制logstash的json日志格式
最近一直在折騰日志的收集，現(xiàn)在算是收尾了。 寫一篇算python優(yōu)化logstash的方案。
其實大家都知道logstash調(diào)用grok來解析日志的話，是要消耗cpu的成本的，畢竟是需要正則的匹配的。
根據(jù)logstash調(diào)優(yōu)的方案，咱們可以預(yù)先生成json的格式。 我這邊基本是python的程序，怎么搞尼 ？
有兩種方法，第一種方法是生成json后，直接打入logstash的端口。 還有一種是生成json寫入文件，讓logstash做tail操作的時候，把一行的日志數(shù)據(jù)直接載入json就可以了。
python下的日志調(diào)試用得時logging，改成json也是很好改得。 另外不少老外已經(jīng)考慮到這樣的需求，已經(jīng)做了python logstash的模塊。
import logging
import logstash
import sys
host = 'localhost'
test_logger = logging.getLogger('python-logstash-logger')
test_logger.setLevel(logging.INFO)
test_logger.addHandler(logstash.LogstashHandler(host, 5959, version=1))
# test_logger.addHandler(logstash.TCPLogstashHandler(host, 5959, version=1))
test_logger.error('python-logstash: test logstash error message.')
test_logger.info('python-logstash: test logstash info message.')
test_logger.warning('python-logstash: test logstash warning message.')
# add extra field to logstash message
extra = {
'test_string': 'python version: ' + repr(sys.version_info),
'test_boolean': True,
'test_dict': {'a': 1, 'b': 'c'},
'test_float': 1.23,
'test_integer': 123,
'test_list': [1, 2, '3'],
}
test_logger.info('python-logstash: test extra fields', extra=extra)
python-logstash自帶了amqp的方案
import logging
import logstash
# AMQP parameters
host = 'localhost'
username = 'guest'
password= 'guest'
exchange = 'logstash.py'
# get a logger and set logging level
test_logger = logging.getLogger('python-logstash-logger')
test_logger.setLevel(logging.INFO)
# add the handler
test_logger.addHandler(logstash.AMQPLogstashHandler(version=1,
host=host,
durable=True,
username=username,
password=password,
exchange=exchange))
# log
test_logger.error('python-logstash: test logstash error message.')
test_logger.info('python-logstash: test logstash info message.')
test_logger.warning('python-logstash: test logstash warning message.')
try:
1/0
except:
test_logger.exception('python-logstash: test logstash exception with stack trace')
不管怎么說，最后生成的格式是這樣就可以了。
{
"@source"=>"unknown",
"@type"=>"nginx",
"@tags"=>[],
"@fields"=>{
"remote_addr"=>"192.168.0.1",
"remote_user"=>"-",
"body_bytes_sent"=>"13988",
"request_time"=>"0.122",
"status"=>"200",
"request"=>"GET /some/url HTTP/1.1",
"request_method"=>"GET",
"http_referrer"=>"http://www.example.org/some/url",
"http_user_agent"=>"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.79 Safari/537.1"
},
"@timestamp"=>"2012-08-23T10:49:14+02:00"
}
我這里簡單提一下，這個模塊用的不是很滿意，我在python下把日志打成了json字符串，我原本以為會像grok那樣，在Es里面，我的這條日志是個字段的結(jié)構(gòu)，而不是這個日志都在message里面…. 我想大家應(yīng)該明白了我的意思，這樣很是不容易在kibana的搜索…
在kibana搜索，我經(jīng)常上 source:xxx AND level:INFO 結(jié)果正像上面描述的那樣，整條日志，都在@message里面。
以上這篇python 串行執(zhí)行和并行執(zhí)行實例就是小編分享給大家的全部內(nèi)容了，希望能給大家一個參考，也希望大家多多支持腳本之家。
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