Eine Welt ohne Coroutinen. Generator-Iteratoren

import socket
from select import select
tasks = []
to_read = {}
to_write = {}

def server():

    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    server_socket.bind(('localhost', 5001))
    server_socket.listen()

    while True:
        yield ('read', server_socket)
        client_socket, addr = server_socket.accept()    
        print('Connection from', addr)
        tasks.append(client(client_socket, addr))       
    print('exit server')

def client(client_socket, addr):

    while True:
        yield ('read', client_socket)
        request = client_socket.recv(4096)              

        if not request:
            break
        else:
            response = 'Hello World\n'.encode()

            yield ('write', client_socket)

            client_socket.send(response)                
    client_socket.close()                               
    print('Stop client', addr)

def event_loop():
    while any([tasks, to_read, to_write]):

        while not tasks:

            ready_to_read, ready_to_write, _ = select(to_read, to_write, [])

            for sock in ready_to_read:
                tasks.append(to_read.pop(sock))

            for sock in ready_to_write:
                tasks.append(to_write.pop(sock))
        try:
            task = tasks.pop(0)

            reason, sock = next(task)   

            if reason == 'read':
                to_read[sock] = task
            if reason == 'write':
                to_write[sock] = task
        except StopIteration:
            print('Done!')
tasks.append(server())
event_loop()

import socket
from select import select

timeout = 0.0; classes = []

class Server:
    def __init__(self): self.nState = 0;

    def x1(self):
        self.ready_client, _, _ = select([self.server_socket], [self.server_socket], [], timeout)
        return self.ready_client

    def y1(self):
        self.server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        self.server_socket.bind(('localhost', 5001))
        self.server_socket.listen()
    def y2(self):
        self.client_socket, self.addr = self.server_socket.accept()
        print('Connection from', self.addr)
        classes.append(Client(self.client_socket, self.addr))

    def loop(self):
        if (self.nState == 0):      self.y1();      self.nState = 1
        elif (self.nState == 1):
            if (self.x1()):         self.y2();      self.nState = 0

class Client:
    def __init__(self, soc, adr): self.client_socket = soc; self.addr = adr; self.nState = 0

    def x1(self):
        self.ready_client, _, _ = select([self.client_socket], [], [], timeout)
        return self.ready_client
    def x2(self):
        _, self.write_client, _ = select([], [self.client_socket], [], timeout)
        return self.write_client
    def x3(self): return self.request

    def y1(self): self.request = self.client_socket.recv(4096);
    def y2(self): self.response = 'Hello World\n'.encode(); self.client_socket.send(self.response)
    def y3(self): self.client_socket.close(); print('close Client', self.addr)

    def loop(self):
        if (self.nState == 0):
            if (self.x1()):                     self.y1(); self.nState = 1
        elif (self.nState == 1):
            if (not self.x3()):                 self.y3(); self.nState = 4
            elif (self.x2() and self.x3()):     self.y2(); self.nState = 0

class EventLoop:
    def __init__(self): self.nState = 0; self.i = 0

    def x1(self): return self.i < len(classes)

    def y1(self): self.i = 0
    def y2(self): classes[self.i].loop()
    def y3(self): self.i += 1
    def y4(self):
        if (classes[self.i].nState == 4):
            classes.pop(self.i)
            self.i -= self.i

    def loop(self):
        if (self.nState == 0):
            if (not self.x1()): self.y1();
            if (self.x1()):     self.y2(); self.y4(); self.y3();

namSrv = Server(); namEv = EventLoop()
while True:
    namSrv.loop(); namEv.loop()

import time
# 1) 110.66 sec
class PCount:
    def __init__(self, cnt ): self.n = cnt; self.nState = 0
    def x1(self): return self.n > 0
    def y1(self): self.n -=1
    def loop(self):
        if (self.nState == 0 and self.x1()):
            self.y1();
        elif (self.nState == 0 and not self.x1()):  self.nState = 4;

class PTimer:
    def __init__(self, p_count):
        self.st_time = time.time(); self.nState = 0; self.p_count = p_count
#    def x1(self): return self.p_count.nStat == 4 or self.p_count.nState == 4
    def x1(self): return self.p_count.nState == 4
    def y1(self):
        t = time.time() - self.st_time
        print ("speed CPU------%s---" % t)
    def loop(self):
       if (self.nState == 0 and self.x1()): self.y1(); self.nState = 1
       elif (self.nState == 1): pass

cnt1 = PCount(1000000)
cnt2 = PCount(10000)
tmr1 = PTimer(cnt1)
tmr2 = PTimer(cnt2)
# event loop
while True:
    cnt1.loop(); tmr1.loop()
    cnt2.loop(); tmr2.loop()

# # 2) 73.38 sec
# class PCount:
#     def __init__(self, cnt ): self.n = cnt; self.nState = 0
#     def loop(self):
#         if (self.nState == 0 and self.n > 0): self.n -= 1;
#         elif (self.nState == 0 and not self.n > 0):  self.nState = 4;
# 
# class PTimer:
#     def __init__(self): self.st_time = time.time(); self.nState = 0
#     def loop(self):
#        if (self.nState == 0 and cnt.nState == 4):
#            t = time.time() - self.st_time
#            print("speed CPU------%s---" % t)
#            self.nState = 1
#        elif (self.nState == 1): exit()
# 
# cnt = PCount(100000000)
# tmr = PTimer()
# while True:
#     cnt.loop();
#     tmr.loop()

# # 3) 35.14 sec
# class PCount:
#     def __init__(self, cnt ): self.n = cnt; self.nState = 0
#     def loop(self):
#         if (self.nState == 0 and self.n > 0):
#             self.n -= 1;
#             return True
#         elif (self.nState == 0 and not self.n > 0):  return False;
#
# cnt = PCount(100000000)
# st_time = time.time()
# while cnt.loop():
#     pass
# t = time.time() - st_time
# print("speed CPU------%s---" % t)

# # 4) 30.53 sec
# class PCount:
#     def __init__(self, cnt ): self.n = cnt; self.nState = 0
#     def loop(self):
#         while self.n > 0:
#             self.n -= 1;
#             return True
#         return False
#
# cnt = PCount(100000000)
# st_time = time.time()
# while cnt.loop():
#     pass
# t = time.time() - st_time
# print("speed CPU------%s---" % t)

# # 5) 18.27 sec
# class PCount:
#     def __init__(self, cnt ): self.n = cnt; self.nState = 0
#     def loop(self):
#         while self.n > 0:
#             self.n -= 1;
#         return False
# 
# cnt = PCount(100000000)
# st_time = time.time()
# while cnt.loop():
#     pass
# t = time.time() - st_time
# print("speed CPU------%s---" % t)

# # 6) 6.96 sec
# def count(n):
#   st_time = time.time()
#   while n > 0:
#     n -= 1
#   t = time.time() - st_time
#   print("speed CPU------%s---" % t)
#   return t
#
# def TestTime(fn, n):
#   def wrapper(*args):
#     tsum=0
#     st = time.time()
#     i=1
#     while (i<=n):
#       t = fn(*args)
#       tsum +=t
#       i +=1
#     return tsum
#   return wrapper
#
# test1 = TestTime(count, 2)
# tt = test1(100000000)
# print("Total ---%s seconds ---" % tt)

/*
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    int C=0;
    while (C != 'e')
    {
        C = getch();
        putchar (C);
    }
    return a.exec();
}
*/
//*
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    int C=0;
    while (C != 'e')
    {
        if (kbhit()) {
            C = getch();
            putch(C);
        }
    }

    return a.exec();
}
//*/