add

rieuse · rieuse · commit 25db319ed740 · 2018-09-18T22:20:04.000+08:00
diff --git a/Python各种模块使用/socket练习.py b/Python各种模块使用/socket练习.py
@@ -0,0 +1,3 @@
+import socket
+
+
diff --git a/Python基础代码/使用with语法计算程序运行时间.py b/Python基础代码/使用with语法计算程序运行时间.py
@@ -0,0 +1,20 @@
+from contextlib import contextmanager
+import time
+
+@contextmanager
+def timer(func):
+    try:
+        start = time.time()
+        yield func()
+    finally:
+        end = time.time()
+        print(end-start)
+
+
+def func():
+    for i in range(9999999):
+        pass
+    time.sleep(1)
+
+with timer(func) as timer:
+    pass
diff --git a/Python基础代码/信号量.py b/Python基础代码/信号量.py
@@ -0,0 +1,32 @@
+import threading
+import time
+
+
+class HtmlSppier(threading.Thread):
+    def __init__(self, url, sem):
+        super().__init__()
+        self.sem = sem
+        self.url = url
+
+    def run(self):
+        time.sleep(2)
+        print('download html success')
+        self.sem.release()
+
+class UrlProducer(threading.Thread):
+    def __init__(self,sem):
+        super().__init__()
+        self.sem = sem
+
+
+    def run(self):
+        for i in range(20):
+            self.sem.acquire()
+            html_thread = HtmlSppier(f'http://www.qq.com/pn={i}',self.sem)
+            html_thread.start()
+
+
+if __name__ == '__main__':
+    sem = threading.Semaphore(3)
+    url_produce = UrlProducer(sem)
+    url_produce.start()
diff --git a/Python基础代码/多线程通信.py b/Python基础代码/多线程通信.py
@@ -0,0 +1,42 @@
+from threading import Thread, Condition
+
+
+class T1(Thread):
+    def __init__(self, con):
+        super().__init__()
+        self.con = con
+
+    def run(self):
+        with self.con:
+            print(1)
+            self.con.notify()
+            self.con.wait()
+            print(3)
+            self.con.notify()
+            self.con.wait()
+
+
+class T2(Thread):
+    def __init__(self, con):
+        super().__init__()
+        self.con = con
+
+    def run(self):
+        with self.con:
+            self.con.wait()
+            print(2)
+            self.con.notify()
+            self.con.wait()
+            print(4)
+            self.con.notify()
+
+
+
+
+if __name__ == '__main__':
+    con = Condition()
+    thread1 = T1(con)
+    thread2 = T2(con)
+
+    thread2.start()
+    thread1.start()
