add threading test for file write

test/test_threading.py

@@ -0,0 +1,13 @@
+import threading
+
+threadLock = threading.Lock()
+
+def write_string(string, path="test.csv"):
+    threadLock.acquire() # 加个同步锁就好了
+    with open(path, 'a') as f:
+        f.write(string + "\r\n")
+    threadLock.release()
+
+# 创建新线程
+for i in range(15):
+    thread1 = threading.Thread(target=write_string, args=["写入: " + str(i)]).run()