多任务时，如何限制启动线程数实例代码,Python代码库,德仔网

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【Python】多任务时，如何限制启动线程数实例
作者:guoyh / 发布于2012/3/6/ 703
<div>coding:utf-8</div>
<div>'''</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>2012-3-4</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>绾跨▼浣跨敤涓&euro;渚?<span class="Apple-tab-span" style="white-space:pre">	</span>绋嬪簭娴嬭瘯涓猴細鏈?00涓换鍔★紝閲囩敤绾跨▼鎵ц锛屾瘡娆℃渶澶氬悓鏃惰窇10涓嚎绋嬨&euro;愬垯璺?0浠诲姟銆?<span class="Apple-tab-span" style="white-space:pre">	</span>鍒欙細100 涓换鍔? 姣忎釜鎵ц闇&euro;瑕?绉?<span class="Apple-tab-span" style="white-space:pre">		</span>濡傞噰鐢ㄥ崟绾跨▼, 100 * 1 =100绉?<span class="Apple-tab-span" style="white-space:pre">		</span>濡傞噰鐢?0绾跨▼鍚岃窇 100/10 * 1 =10绉?<span class="Apple-tab-span" style="white-space:pre">	</span>浠庡姣旂湅锛屽彲瑙佷娇鐢ㄧ嚎绋嬬殑濂藉</div>
<div>'''</div>
import datetime</div>
import os,sys</div>
import re</div>
<div>from threading import Thread</div>
import time</div>
<div>def getNow():#2010-06-04 11:46:04.992000</div>
<div>  return datetime.datetime.now()</div>
<div>output = ""</div>
<div></div>
<div>class PING(Thread):</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>count = 0</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>global output</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>def __init__(self,ip=None):</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>Thread.__init__(self)</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>self.ip=ip</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>self.__class__.count = self.__class__.count + 1</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>def run(self):</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>time.sleep(1)</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>self.dataoutput = self.ip +self.ip</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>def __del__(self):</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>global output</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>self.__class__.count = self.__class__.count - 1</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>output = ("%s %s -->%s %s \n" %(output,self.ip,self.dataoutput,getNow()))</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>pass</div>
<div></div>
<div></div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span></div>
<div> 娴嬭瘯</div>
<div>澶氱嚎绋嬪悓鏃舵墽琛?t=None</div>
<div>i = 0</div>
<div>nums = 10 #鍚屾椂杩愯绾跨▼鏁?count= 100 #闇&euro;瑕佸鐞嗘暟鎹暟</div>
<div>while True:</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>if i >= count:</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>break</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>else:</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>T_thread=[]</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>for j in range(nums):</div>
<div><span class="Apple-tab-span" style="white-space:pre">			</span>if i >= count:</div>
<div><span class="Apple-tab-span" style="white-space:pre">				</span>break</div>
<div><span class="Apple-tab-span" style="white-space:pre">			</span>else:</div>
<div><span class="Apple-tab-span" style="white-space:pre">				</span>t=PING(i)</div>
<div><span class="Apple-tab-span" style="white-space:pre">				</span>T_thread.append(t)</div>
<div><span class="Apple-tab-span" style="white-space:pre">				</span>print("i == %s " % (i))</div>
<div><span class="Apple-tab-span" style="white-space:pre">				</span>i += 1</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>for j in range(len(T_thread)):</div>
<div><span class="Apple-tab-span" style="white-space:pre">			</span>print("--> %s " % (j))</div>
<div><span class="Apple-tab-span" style="white-space:pre">			</span>T_thread[j].start()</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>#sleep鏃堕棿鎺ㄧ畻鏂规硶锛岄渶瑕佸ぇ璋冪敤浠诲姟鍑芥暟鎵ц浣跨敤鏃堕棿锛屼笂闈㈠嚱鏁皊leep涓? 锛屽洜姝よ澶囦负2</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>time.sleep(2)</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>del T_thread</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>del t</div>
<div>print(output)</div>
<div>'''</div>
<div>class test:</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>def __init__(self,ip):</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>self.ip=ip</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>def print1(self):</div>
<div><span class="Apple-tab-span" style="white-space:pre">		</span>print(self.ip)</div>
<div>t=test(50)</div>
<div>t.print1()</div>
<div>t=test(60)</div>
<div>t.print1()</div>
<div>''</div>
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