更新

Python-100-Days/Day01-15/Day13/test2.py

@@ -0,0 +1,51 @@
+import time
+from threading import Thread, Lock
+
+
+class Account(object):
+
+    def __init__(self, balance=0):
+        self._balance = balance
+        self._lock = Lock()
+
+    @property
+    def balance(self):
+        return self._balance
+
+    def deposit(self, money):
+        # 当多个线程同时访问一个资源的时候 就有可能因为竞争资源导致资源的状态错误
+        # 被多个线程访问的资源我们通常称之为临界资源 对临界资源的访问需要加上保护
+        if money > 0:
+            self._lock.acquire()
+            try:
+                new_balance = self._balance + money
+                time.sleep(0.01)
+                self._balance = new_balance
+            finally:
+                self._lock.release()
+
+
+class AddMoneyThread(Thread):
+
+    def __init__(self, account):
+        super().__init__()
+        self._account = account
+
+    def run(self):
+        self._account.deposit(1)
+
+
+def main():
+    account = Account(1000)
+    tlist = []
+    for _ in range(100):
+        t = AddMoneyThread(account)
+        tlist.append(t)
+        t.start()
+    for t in tlist:
+        t.join()
+    print('账户余额: %d元' % account.balance)
+
+
+if __name__ == '__main__':
+    main()