algorithm/hello-algo
1
0
Fork 0
mirror of https://github.com/krahets/hello-algo.git synced 2025-07-06 14:27:26 +08:00
Code Issues Packages Projects Releases Wiki Activity

Add Python code (Chapter of searching)

Browse Source 
to the docs.
This commit is contained in:
Yudong Jin
2022-12-04 01:43:58 +08:00
parent e5563b3964
commit 8e34be0641
6 changed files with 106 additions and 51 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
codes/python/chapter_searching/linear_search.py
View File

@ -9,30 +9,33 @@ sys.path.append(osp.dirname(osp.dirname(osp.abspath(__file__))))
from include import *
""" 线性查找（数组） """
def linear_search(nums,target):
def linear_search(nums, target):
# 遍历数组
for i in range(len(nums)):
if nums[i]==target: # 找到目标元素，返回其索引
if nums[i] == target: # 找到目标元素，返回其索引
return i
return -1 # 未找到目标元素，返回 -1
return -1 # 未找到目标元素，返回 -1
""" 线性查找（链表） """
def linear_search_by_link(head,target):
def linear_search1(head, target):
# 遍历链表
while head:
if head.val==target: # 找到目标结点，返回之
return head
head=head.next
return None # 未找到目标结点，返回 None (Python为None)
if head.val == target: # 找到目标结点，返回之
return head
head = head.next
return None # 未找到目标结点，返回 None
if __name__=='__main__':
target=3
""" Driver Code """
if __name__ == '__main__':
target = 3
# 在数组中执行线性查找
nums=[1, 5, 3, 2, 4, 7, 5, 9, 10, 8]
index=linear_search(nums,target)
print("目标元素 3 的索引 = " ,index)
nums = [1, 5, 3, 2, 4, 7, 5, 9, 10, 8]
index = linear_search(nums, target)
print("目标元素 3 的索引 =", index)
# 在链表中执行线性查找
head=list_to_linked_list(nums)
node=linear_search_by_link(head,target)
print("目标结点值 3 的对应结点对象为 " ,node)
head = list_to_linked_list(nums)
node = linear_search1(head, target)
print("目标结点值 3 的对应结点对象为", node)