save project

diy1.py

+import time
+'''
+begin_time=time.time()
 list1 = []
 list1 = []
 for a in range(0, 1000):
 for a in range(0, 1000):
     for b in range(0, 1000):
     for b in range(0, 1000):
-        list1.insert(0, 0)
+        list1.append(0)
\ No newline at end of file
+end_time=time.time()
+print(end_time-begin_time)
+'''
+#冒泡排序的实现原理
+def b_l(l):
+    n = len(l)
+    #i表示第几轮
+    for i in range(0,n-1):
+        #j表示列表的下标
+        for j in range(0,n-1):
+            #比大小
+            if l[j] > l[j+1]:
+                l[j],l[j+1] = l[j+1],l[j]

diy2.py

+num_list=[]
+n=int(input("数字个数："))
+for i in range(n):
+    num=int(input("请输入第"+str(i+1)+"个数"))
+    num_list.append(num)
+for i in range(n-1):
+    for j in range(n-1-i):
+        if num_list[j]>num_list[j+1]:
+            num_list[j],num_list[j+1]=num_list[j+1],num_list[j]
+    print(num_list)
+