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查询Tags标签： self，共有 3605条记录-
Python循环替换字典中的None
循环替换字典中的None值：class Gsxt:""""""def __init__(self, company_name, city):passdef replace_dict(self, tmp_dict_or_list):if isinstance(tmp_dict_or_list, dict):for k, v in tmp_dict_or_list.items():if isinstance(v, (dic…
2021/7/29 12:05:52 人评论 次浏览 -
最小的k个数-剑指offer40-python
算法思想 排序思想比较简单，时间复杂度是O(nlogn)，代码不展示了。 利用类似快排的思想，可以使时间复杂度为O(n)。 python class Solution:def partition(self, arr, left, right):i = left - 1pviot = arr[right]for j in range(left, right):if arr[j] < pviot:i +…
2021/7/29 11:35:40 人评论 次浏览 -
最小的k个数-剑指offer40-python
算法思想 排序思想比较简单，时间复杂度是O(nlogn)，代码不展示了。 利用类似快排的思想，可以使时间复杂度为O(n)。 python class Solution:def partition(self, arr, left, right):i = left - 1pviot = arr[right]for j in range(left, right):if arr[j] < pviot:i +…
2021/7/29 11:35:40 人评论 次浏览 -
[LeetCode] 25. Reverse Nodes in k-Group_Hard tag: Linked List
Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. k is a positive integer and is less than or equal to the length of the linked list. If the number of nodes is not a multiple of k then left-out nodes, in…
2021/7/29 9:06:10 人评论 次浏览 -
[LeetCode] 25. Reverse Nodes in k-Group_Hard tag: Linked List
Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. k is a positive integer and is less than or equal to the length of the linked list. If the number of nodes is not a multiple of k then left-out nodes, in…
2021/7/29 9:06:10 人评论 次浏览 -
slicer学习笔记（四）
MyFirstModule 暂时可以通过的测试程序： import os import unittest import logging import vtk, qt, ctk, slicer from slicer.ScriptedLoadableModule import * from slicer.util import VTKObservationMixin# # MyFirstModule #class MyFirstModule(ScriptedLoadableM…
2021/7/29 6:09:17 人评论 次浏览 -
slicer学习笔记（四）
MyFirstModule 暂时可以通过的测试程序： import os import unittest import logging import vtk, qt, ctk, slicer from slicer.ScriptedLoadableModule import * from slicer.util import VTKObservationMixin# # MyFirstModule #class MyFirstModule(ScriptedLoadableM…
2021/7/29 6:09:17 人评论 次浏览 -
[LeetCode] 5. Longest Palindromic Substring _Medium tag: Two pointers
Given a string s, return the longest palindromic substring in s.Example 1: Input: s = "babad" Output: "bab" Note: "aba" is also a valid answer.Example 2: Input: s = "cbbd" Output: "bb"Example 3: Input:…
2021/7/29 6:07:53 人评论 次浏览 -
[LeetCode] 5. Longest Palindromic Substring _Medium tag: Two pointers
Given a string s, return the longest palindromic substring in s.Example 1: Input: s = "babad" Output: "bab" Note: "aba" is also a valid answer.Example 2: Input: s = "cbbd" Output: "bb"Example 3: Input:…
2021/7/29 6:07:53 人评论 次浏览 -
[Leetcode] 543. Diameter of Binary Tree_Easy Tag: DFS
543. Diameter of Binary TreeEasy 5310325Add to ListShareGiven the root of a binary tree, return the length of the diameter of the tree. The diameter of a binary tree is the length of the longest path between any two nodes in a tree. This path may or m…
2021/7/29 6:05:56 人评论 次浏览 -
[Leetcode] 543. Diameter of Binary Tree_Easy Tag: DFS
543. Diameter of Binary TreeEasy 5310325Add to ListShareGiven the root of a binary tree, return the length of the diameter of the tree. The diameter of a binary tree is the length of the longest path between any two nodes in a tree. This path may or m…
2021/7/29 6:05:56 人评论 次浏览 -
SQLAlchemy 事务
定义两个表User和Person， 先插入第一个表，抛出异常，在插入第二个表 UserModelfrom sqlalchemy import Column, Integer, VARCHAR from sqlalchemy.orm import declarative_baseBase = declarative_base()class User(Base):__tablename__ = usersid = Column(Integer, p…
2021/7/29 2:35:57 人评论 次浏览 -
SQLAlchemy 事务
定义两个表User和Person， 先插入第一个表，抛出异常，在插入第二个表 UserModelfrom sqlalchemy import Column, Integer, VARCHAR from sqlalchemy.orm import declarative_baseBase = declarative_base()class User(Base):__tablename__ = usersid = Column(Integer, p…
2021/7/29 2:35:57 人评论 次浏览 -
Python 抛自定义异常
自定义异常，抛自定义异常，捕获异常，打印异常堆栈import tracebackclass UserNameTooLong(Exception):def __init__(self, long):self.long = longdef __str__(self):return user name length is + str(self.long) + " too long"def raise_error():s = input…
2021/7/29 1:06:00 人评论 次浏览 -
Python 抛自定义异常
自定义异常，抛自定义异常，捕获异常，打印异常堆栈import tracebackclass UserNameTooLong(Exception):def __init__(self, long):self.long = longdef __str__(self):return user name length is + str(self.long) + " too long"def raise_error():s = input…
2021/7/29 1:06:00 人评论 次浏览
