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python 串行执行和并行执行实例

时间：2020-07-13 python教程 查看: 1087

我就废话不多说了，大家还是直接看代码吧！

#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 


这个时候是串行 花费了15秒 


多线程跑:

#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 

此时花了 8秒

补充知识：python logging定制logstash的json日志格式

最近一直在折腾日志的收集，现在算是收尾了。 写一篇算python优化logstash的方案。

其实大家都知道logstash调用grok来解析日志的话，是要消耗cpu的成本的，毕竟是需要正则的匹配的。

根据logstash调优的方案，咱们可以预先生成json的格式。 我这边基本是python的程序，怎么搞尼 ？

有两种方法，第一种方法是生成json后，直接打入logstash的端口。 还有一种是生成json写入文件，让logstash做tail操作的时候，把一行的日志数据直接载入json就可以了。

python下的日志调试用得时logging，改成json也是很好改得。 另外不少老外已经考虑到这样的需求，已经做了python logstash的模块。

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)```

<p>python-logstash自带了amqp的方案</p>

```python  
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')

不管怎么说，最后生成的格式是这样就可以了。

{
  "@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"
}

我这里简单提一下，这个模块用的不是很满意，我在python下把日志打成了json字符串，我原本以为会像grok那样，在Es里面，我的这条日志是个字段的结构，而不是这个日志都在message里面…. 我想大家应该明白了我的意思，这样很是不容易在kibana的搜索…

在kibana搜索，我经常上 source:xxx AND level:INFO 结果正像上面描述的那样，整条日志，都在@message里面。

以上这篇python 串行执行和并行执行实例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python博客。

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