python 多线程串行和并行的实例
如下所示：
#coding=utf-8
import threading
import time
import cx_Oracle
from pprint import pprint
import csv
table_name = "dbtest.csv"
f = open(table_name + ".csv", "w")
def exp01():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp01' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp02():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp02' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp03():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp03' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp04():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp04' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp05():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp05' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp06():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp06' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp07():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp07' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp08():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp08' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp09():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp09' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp10():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp10' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp11():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp11' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp12():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp12' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp13():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp13' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp14():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp14' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
threads = []
t1 = threading.Thread(target=exp01,name='exp01')
threads.append(t1)
t2 = threading.Thread(target=exp02,name='exp02')
threads.append(t2)
t2 = threading.Thread(target=exp03,name='exp03')
threads.append(t2)
t2 = threading.Thread(target=exp04,name='exp04')
threads.append(t2)
t2 = threading.Thread(target=exp05,name='exp05')
threads.append(t2)
t2 = threading.Thread(target=exp06,name='exp06')
threads.append(t2)
t2 = threading.Thread(target=exp07,name='exp07')
threads.append(t2)
t2 = threading.Thread(target=exp08,name='exp08')
threads.append(t2)
t2 = threading.Thread(target=exp09,name='exp09')
threads.append(t2)
t2 = threading.Thread(target=exp10,name='exp10')
threads.append(t2)
t2 = threading.Thread(target=exp11,name='exp11')
threads.append(t2)
t2 = threading.Thread(target=exp12,name='exp12')
threads.append(t2)
t2 = threading.Thread(target=exp13,name='exp13')
threads.append(t2)
t2 = threading.Thread(target=exp14,name='exp14')
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 "
输出:
C:Python27python.exe C:/Users/TLCB/PycharmProjects/untitled/mycompany/thread/p7.py
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<_MainThread(MainThread, started 156528)>
<Thread(exp01, started 155004)>
select 'exp01' from dual
<Thread(exp12, started 155744)>
select 'exp12' from dual<Thread(exp02, started 155000)>
select 'exp02' from dual
<Thread(exp08, started 155728)>
select 'exp08' from dual
<Thread(exp06, started 155752)>
select 'exp06' from dual
<Thread(exp03, started 154816)>
select 'exp03' from dual
<Thread(exp09, started 156544)>
select 'exp09' from dual
<Thread(exp11, started 155760)>
select 'exp11' from dual
<Thread(exp04, started 154112)>
select 'exp04' from dual
<Thread(exp10, started 155764)><Thread(exp05, started 154640)>
select 'exp10' from dualselect 'exp05' from dual
<Thread(exp07, started 155188)>
select 'exp07' from dual
<Thread(exp13, started 154600)>
select 'exp13' from dual
<Thread(exp14, started 155804)>
select 'exp14' from dual
SID SERIAL# USERNAME PREV_SQL_ID
1 9 1179 TEST 01tjnxmmurdw7
2 10 75 TEST g5ph474nsjvwv
3 12 907 TEST 87mdhpgj9k5tz
4 419 1303 TEST 4g8r4bkf8aq3n
5 420 655 TEST 1rx9mjdvp1udx
6 421 1955 TEST 928r7khrtn4jd
7 424 51 TEST d6sgjjwpm74qz
8 839 3 TEST a1hg7hrwgrdqk
9 840 43 TEST fqjuj4qp5hmf0
10 841 111 TEST 2jzx0889h3k5n
11 1252 145 TEST awtzfbx7dhn88
12 1253 7 TEST 55tzs9gdmcd4p
13 1254 9 TEST 4v01fvb5sj7k4
14 1255 265 TEST 39bcsfjr5y62b
此时是并发执行
改变join的位置:
#coding=utf-8
import threading
import time
import cx_Oracle
from pprint import pprint
import csv
table_name = "dbtest.csv"
f = open(table_name + ".csv", "w")
def exp01():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp01' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp02():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp02' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp03():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp03' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp04():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp04' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp05():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp05' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp06():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp06' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp07():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp07' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp08():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp08' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp09():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp09' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp10():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp10' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp11():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp11' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp12():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp12' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp13():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp13' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
def exp14():
conn = cx_Oracle.connect('test/test@192.168.137.2/serv')
cursor = conn.cursor()
owner = "system"
writer = csv.writer(f, lineterminator="n", quoting=csv.QUOTE_NONNUMERIC)
tname = threading.current_thread()
print tname
exportOracleSql = "select 'exp14' from dual"
print exportOracleSql
x = cursor.execute(exportOracleSql)
time.sleep(1000)
cursor.close()
conn.close()
threads = []
t1 = threading.Thread(target=exp01,name='exp01')
threads.append(t1)
t2 = threading.Thread(target=exp02,name='exp02')
threads.append(t2)
t2 = threading.Thread(target=exp03,name='exp03')
threads.append(t2)
t2 = threading.Thread(target=exp04,name='exp04')
threads.append(t2)
t2 = threading.Thread(target=exp05,name='exp05')
threads.append(t2)
t2 = threading.Thread(target=exp06,name='exp06')
threads.append(t2)
t2 = threading.Thread(target=exp07,name='exp07')
threads.append(t2)
t2 = threading.Thread(target=exp08,name='exp08')
threads.append(t2)
t2 = threading.Thread(target=exp09,name='exp09')
threads.append(t2)
t2 = threading.Thread(target=exp10,name='exp10')
threads.append(t2)
t2 = threading.Thread(target=exp11,name='exp11')
threads.append(t2)
t2 = threading.Thread(target=exp12,name='exp12')
threads.append(t2)
t2 = threading.Thread(target=exp13,name='exp13')
threads.append(t2)
t2 = threading.Thread(target=exp14,name='exp14')
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 "
C:Python27python.exe C:/Users/TLCB/PycharmProjects/untitled/mycompany/thread/p7.py
<_MainThread(MainThread, started 154776)>
<Thread(exp01, started 156240)>
select 'exp01' from dual
此时变成串行,数据库连接也只有一个:
SID SERIAL# USERNAME PREV_SQL_ID
1 421 1957 TEST 928r7khrtn4jd
以上这篇python 多线程串行和并行的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来客网。
