更新

Python-100-Days/Day01-15/Day13/multithread5.py

@@ -0,0 +1,63 @@
+"""
+
+多个线程共享数据 - 没有锁的情况
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-20
+
+"""
+
+from time import sleep
+from threading import Thread, Lock
+
+
+class Account(object):
+
+    def __init__(self):
+        self._balance = 0
+        self._lock = Lock()
+
+    def deposit(self, money):
+        # 先获取锁才能执行后续的代码
+        self._lock.acquire()
+        try:
+            new_balance = self._balance + money
+            sleep(0.01)
+            self._balance = new_balance
+        finally:
+            # 这段代码放在finally中保证释放锁的操作一定要执行
+            self._lock.release()
+
+    @property
+    def balance(self):
+        return self._balance
+
+
+class AddMoneyThread(Thread):
+
+    def __init__(self, account, money):
+        super().__init__()
+        self._account = account
+        self._money = money
+
+    def run(self):
+        self._account.deposit(self._money)
+
+
+def main():
+    account = Account()
+    threads = []
+    # 创建100个存款的线程向同一个账户中存钱
+    for _ in range(100):
+        t = AddMoneyThread(account, 1)
+        threads.append(t)
+        t.start()
+    # 等所有存款的线程都执行完毕∫
+    for t in threads:
+        t.join()
+    print('账户余额为: ￥%d元' % account.balance)
+
+
+if __name__ == '__main__':
+    main()