auto save

lesoon13-diy1.py

+import time
+
+start_time = time.time()    # 开始时间
+print("开始时间为：", start_time)
+
+list1 = []
+for a in range(0, 1000):
+    for b in range(0, 1000):
+        list1.insert(0, 0)
+end_time = time.time()      # 结束时间
+print("结束时间为：", end_time)
+
+result = end_time - start_time
+print("总共耗时：", result)
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lesson13-diy2.py

+alist = [88, 75, 72, 82, 90, 85, 78, 91]
+
+n = len(alist)
+# i表示第几轮排序
+for i in range(0, n-1):
+    for j in range(0, n-1):   # j表示列表的索引下标
+        # 比较大小并交换
+        if alist[j] < alist[j + 1]:
+            alist[j], alist[j + 1] = alist[j + 1], alist[j]
+    print(alist)
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