save project

diy1.py

+import time
+
+start_time = time.time()
+list1 = []
+for a in range(0,1000):
+    for b in range(0,1000):
+        list1.append(0)
+end_time = time.time()
+print('总用时：',end_time-start_time)
\ No newline at end of file