def swap_sort()
时间: 2023-08-16 21:14:10 浏览: 40
这是一个函数的声明,但是在括号内应该包含参数的定义。可以这样写:
```python
def swap_sort(lst):
"""
该函数实现冒泡排序,返回排序后的列表
"""
n = len(lst)
for i in range(n):
for j in range(0, n-i-1):
if lst[j] > lst[j+1]:
lst[j], lst[j+1] = lst[j+1], lst[j]
return lst
```
这个函数接受一个列表作为参数,并对该列表进行冒泡排序,最后返回排序后的列表。
相关问题
def bubble_sort
Bubble sort is a simple sorting algorithm that repeatedly steps through the list, compares adjacent elements and swaps them if they are in the wrong order. The pass through the list is repeated until the list is sorted. Here's an example of bubble sort in Python:
```
def bubble_sort(arr):
n = len(arr)
# Traverse through all array elements
for i in range(n):
# Last i elements are already in place
for j in range(0, n-i-1):
# Swap if the element found is greater than the next element
if arr[j] > arr[j+1]:
arr[j], arr[j+1] = arr[j+1], arr[j]
return arr
```
This function takes an array `arr` as input and returns a sorted array using bubble sort. The outer loop runs `n` times, where `n` is the length of the array. For each iteration of the outer loop, the inner loop runs `n-i-1` times, where `i` is the current iteration of the outer loop. The inner loop compares adjacent elements and swaps them if they are in the wrong order. At the end of each iteration of the outer loop, the last `i` elements are already in place, so the inner loop doesn't need to check them again.
def bubble_sort(arr): n = len(arr) count = 0 # 记录交换次数 for i in range(n): for j in range(n-i-1): if arr[j] > arr[j+1]: arr[j], arr[j+1] = arr[j+1], arr[j] count += 1 return count# 示例T = int(input()) # 测试数据组数for i in range(T): N = int(input()) # 该组数据的元素个数 arr = list(map(int, input().split())) # 读入该组数据 swap_count = bubble_sort(arr) # 计算交换次数 print(swap_count)出现invalid literal for int() with base 10: '5 1 2 3 4 5'问题该如何解决
这个错误是因为输入的字符串中包含了空格,而 int() 函数只能处理不包含空格的字符串。需要将输入的字符串先按照空格拆分成一个个子字符串,再将每个子字符串转换成整数。可以使用 split() 方法来实现字符串拆分,修改代码如下:
```
T = int(input()) # 测试数据组数
for i in range(T):
input_str = input() # 读入该组数据的字符串
input_list = input_str.split() # 将字符串按照空格拆分成一个个子字符串
N = int(input_list[0]) # 该组数据的元素个数
arr = list(map(int, input_list[1:])) # 将剩余的子字符串转换成整数,并组成一个列表
swap_count = bubble_sort(arr) # 计算交换次数
print(swap_count)
```
这样就可以正确地处理输入字符串中包含空格的情况了。