随笔分类 - Python 学习
摘要：import pymysqlconn=pymysql.connect("localhost",port=3306,user="root",passwd="xsy7437",db="studentdb",charset="utf8")cursor=conn.cursor()data=[ ("李四","
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摘要：produce:import pikaconnection = pika.BlockingConnection(pika.ConnectionParameters("localhost") )channel=connection.channel()channel.queue_declare(queu
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摘要：import selectors import socket sel = selectors.DefaultSelector() def accept(sock, mask): conn, addr = sock.accept() # Should be ready print('accepted'
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摘要：import selectimport socketimport queueserver = socket.socket()server.bind(("localhost",9999))server.listen(1000)server.setblocking(False)inputs=[serve
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摘要：from urllib import requestimport gevent,timefrom gevent import monkeymonkey.patch_all() def f(url): print('GET: %s' % url) resp = request.urlopen(url)
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摘要：import geventdef f1(): print("print in f1") gevent.sleep(2) print("switch to foo again")def f2(): print("print in f2") gevent.sleep(1) print("switch t
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摘要：from greenlet import greenletdef test1(): print("a") gr2.switch() print("b") gr2.switch()def test2(): print("c") gr1.switch() print("d") gr1 = greenle
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摘要：from multiprocessing import Process,Poolimport time,osdef Foo(i): time.sleep(2) print("in the Proess ",os.getpid()) return idef Bar(arg): print("-->ex
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摘要：from multiprocessing import Process,Lockdef run_lock(l,i): l.acquire() print("Hello ",i) l.release()l=Lock()if __name__=="__main__": for i in range(10
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摘要：from multiprocessing import Manager,Processimport osdef f(d,l): d[os.getpid()]=os.getpid() l.append(os.getpid()) print(l)if __name__=="__main__": with
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摘要：from multiprocessing import Process,Pipedef f(conn): conn.send([42,None,"Hello"]) print(conn.recv()) print("I m fine ,parent") conn.close()if __name__
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摘要：from multiprocessing import Process,Queuedef f(q): q.put([42,None,"Hello"])if __name__ == "__main__": q=Queue() p=Process(target=f,args=(q,)) p.start(
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摘要：import multiprocessing,threadingimport timeimport osdef threading_run(): print("线程ID",threading.get_ident())t=threading.Thread(target=threading_run)de
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摘要：import threading,time,queueq=queue.Queue(maxsize = 10)def product(name): count = 1 while True: q.put(count) print("%s生产了%s个骨头"%(name,count)) count +=
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摘要：import threadingimport timeevent=threading.Event()def lighter(): count = 0 while True: if count < 5: event.set() print("\033[1;42m;green light is on \
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摘要：显示颜色格式：\033[显示方式;字体色;背景色m......[\033[0m] 字体色 | 背景色 | 颜色描述 30 | 40 | 黑色 31 | 41 | 红色 32 | 42 | 绿色 33 | 43 | 黃色 34 | 44 | 蓝色 35 | 45 | 紫红色 36 | 46 | 青蓝色
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摘要：import threadingimport timedef run (n): semaphore.acquire() time.sleep(1) print("run threading :",n) semaphore.release()semaphore=threading.BoundedSem
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摘要：线程的使用书写示例：（1）import threadingimport timedef run(str1): print("task:", str1) time.sleep(5) for i in range (30): t1 = threading.Thread(target= run ,args
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