_syntax_error_-优快云博客

原创 ‘pip install‘ fails for every package (“Could not find a version that satisfies the requirement“)

详见https://stackoverflow.com/questions/49748063/pip-install-fails-for-every-package-could-not-find-a-version-that-satisfiescurl https://bootstrap.pypa.io/get-pip.py | pythonpip install --upgrade setuptools

2021-09-11 15:22:02 161

原创 ERROR: Could not find a version that satisfies the requirement torch-scatter==2.0.4+cu100

ERROR: Could not find a version that satisfies the requirement torch-scatter==2.0.4+cu100torch-scatter、torch-cluster等等，通用，打开torch_geometric的文档 torch_geometric官网pip install torch-scatter -f https://data.pyg.org/whl/torch-${TORCH}+${CUDA}.htmlpip install

2021-09-11 15:04:33 991

原创 Django安装与基础使用

本文内容包括Django安装以及实现一个简易网站Demo参考自Python Tutorial for Beginners [Full Course] Learn Python for Web Development本人环境Ubuntu18.04，python3.6Django安装一条命令解决pip3 install django如果在国内安装出现超时可以更换pip源，例如pip...

2020-04-15 18:45:22 627

原创 Sublime + PlantUML配置

Sublime + PlantUML配置PlantUML是什么PlantUML示例sublime + plantUML环境配置需求环境java 环境配置sublime text 配置graphviz 和 sublime-plantuml插件配置graphviz 配置sublime-plantUML插件重启sublime 提示 Unable to load diagram plugin, chec...

2020-04-07 12:50:50 1566 1

原创 FileNotFoundException: This file can not be opened as a file descriptor; it is probably compressed

FileNotFoundException: This file can not be opened as a file descriptor; it is probably compressedAndroid加载资源时报错。因为非常见后缀名文件可能被压缩，具体参考：https://stackoverflow.com/questions/6186866/java-io-filenotf...

2020-03-20 16:54:39 735 1

原创 Android 申请网络权限后还是连不上网

在AndroidManifest.xml中：android:usesCleartextTraffic="true"

2020-03-07 20:18:37 1041

原创 NetworkInfo弃用

https://blog.youkuaiyun.com/q851587550/article/details/102783984

2020-02-26 22:09:09 1568

原创 Django启动失败,ImportError: Couldn't import Django. Are you sure it's installed and available on your PY

(base) root@wu-Inspiron-3558:/home/wu/PycharmProjects/pyshop# python3 manage.py runserverTraceback (most recent call last): File "manage.py", line 10, in main from django.core.management impor...

2020-02-25 13:51:44 5031 2

原创 pip安装超时raise ReadTimeoutError(self._pool, None, 'Read timed out.') pip._vendor.urllib3.exceptions.Re

解决办法，更换软件源：pip源阿里云 http://mirrors.aliyun.com/pypi/simple/中国科技大学https://mirrors.tuna.tsinghua.edu.cn/pypi/web/simple/豆瓣http://pypi.doubanio.com/simple/清华大学https://pypi.tuna.tsinghua.edu.cn/simple...

2020-02-25 10:47:04 3085

原创 Python3使用pip3，相关操作命令

安装sudo apt-get install python3-pip升级sudo pip3 install --upgrade pip卸载sudo apt-get remove python3-pip修复（这个真的很好用！！！出错了记得修复）sudo apt-get install --reinstall python3-pip...

2020-02-24 12:15:27 265

原创 [Android]浏览器无法访问网络

1、AndroidManifest.xml的manifest中添加<uses-permission android:name="android.permission.INTERNET"/>2、如果访问的是http，高版本的Andorid(已知9以上）需要：改成https 或者， AndroidManifest.xml的application中...

2020-02-21 11:18:52 503

原创 [Android]SharedPreference存储成功，读取不到

问题描述： commit()或者apply()之后保存成功，并且打开对应的xml文件查看储存成功，但是onCreat时get不到xml文件中储存的值。解决办法：建议一个Activity抽取一个全局变量 SharedPreferences mSharedPreferences，就能维持一致性。...

2020-02-21 11:09:17 1133

原创 AVD无法启动问题

AVD点击运行后无法启动，error 1emulator: ERROR:This AVD's configuration is missing a kernel file等等比较误导。其实是因为HAXM没有安装。自己找资源安装好就好了。 ...

2018-09-08 00:34:51 1864

原创存一下大作业过程中遇到的问题的，有效帮我解决问题的链接

UEFI和GPT下安装Ubuntu16.04和Windows10双系统：点击打开链接Ubuntu16.04安装QT5.8.0：点击打开链接ldd的时候ldd libqsqlmysql.so发现libmysqlclient_r.so.16 => not foundlibssl.so.10 => not foundlibcrypto.so.10 => not found我没有遇到这个...

2018-06-13 20:02:27 872 2

原创 Ubuntu16.04和Windows10双系统安装（UEFI和GPT）

前段时间做大作业，在已有Windows10的电脑上面安装了Ubuntu16.04。其实真正安装过程很快，但是中间遇到了很多误区，导致前前后后弄了三四天这样才装上。首先是在网上面搜索安装过程的时候，按照很多教程的安装过程最后都会在U盘安装完成之后要求重启的时候，重启完成并进入Ubuntu系统的时候提示"please remove installation media and close the tr...

2018-06-13 19:34:34 474

原创 Qt5.9.2+VS2015：error LNK2019: 无法解析的外部符号 impCommandLineToArgvW@8，该符号在函数 _WinMain@16 中被引用

原因：未包含Shell32.lib解决1：#pragma comment(lib, "Shell32.lib")解决2：属性管理器：链接器->输入->附加依赖项->Shell32.lib （在常规中添加好对应附加库目录）...

2018-05-01 20:10:06 3789 1

原创 [LeetCode]25. Reverse Nodes in k-Group

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 no...

2018-03-24 08:53:13 211

原创 24. Swap Nodes in Pairs

Given a linked list, swap every two adjacent nodes and return its head.For example,Given 1->2->3->4, you should return the list as 2->1->4->3.Your algorithm should use only constant ...

2018-03-24 08:51:59 197

原创 [LeetCode]23. Merge k Sorted Lists

Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity.代码如下：class Solution {public: ListNode* mergeKLists(vector<ListNode*>& lists) { if (lists...

2018-03-24 08:50:57 169

原创程序设计实验一：学生信息管理系统（map实现)

要求：一能够输出所有学生信息二能够添加学生三能够删除学生四能够查看学生的课程信息五异常处理、控制台循环代码如下：1 课程信息struct SelectedClass{ string s_Class; int i_Score; SelectedClass(string c, int s) :s_Class(c), i_Score(s) {}};2 学生信息struct Stude...

2018-03-20 19:51:08 689

原创 [LeetCode]22. Generate Parentheses

Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses.For example, given n = 3, a solution set is:[ "((()))", "(()())", "(())()", "()(())", "...

2018-03-20 19:44:13 310

原创 [LeetCode]21. 合并两个有序链表

合并两个已排序的链表，并将其作为一个新列表返回。新列表应该通过拼接前两个列表的节点来完成。示例：输入：1->2->4, 1->3->4输出：1->1->2->3->4->4 Personal tips: 递归，代码如下：class Solution {public: ListNode* mergeTwoLists(ListNode* ...

2018-03-17 10:19:43 379

原创 [LeetCode]20. Valid Parentheses

Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.The brackets must close in the correct order, "()" and "()[]{}" are all valid but ...

2018-03-17 09:55:39 143

原创 [LeetCode]19. Remove Nth Node From End of List

Given a linked list, remove the nth node from the end of list and return its head.For example, Given linked list: 1->2->3->4->5, and n = 2. After removing the second node from the en...

2018-03-16 19:05:28 112

原创 [LeetCode]18. 4Sum（自学留存）

Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets in the array which gives the sum of target.Note: The solution set m...

2018-03-15 12:24:57 232

原创 [LeetCode]17. Letter Combinations of a Phone Number（自学留存）

Given a digit string, return all possible letter combinations that the number could represent.A mapping of digit to letters (just like on the telephone buttons) is given below.Input:Digit string "23"...

2018-03-14 17:59:40 127

原创 [LeetCode]16. 3Sum Closest（自学留存）

Given an array S of n integers, find three integers in S such that the sum is closest to a given number, target. Return the sum of the three integers. You may assume that each input would have exactly...

2018-03-13 19:30:40 166

原创 [LeetCode]15. 3Sum（自学留存）

Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero.Note: The solution set must not contain dupli...

2018-03-12 21:11:57 165

原创 [LeetCode]14. Longest Common Prefix（自学留存）

Write a function to find the longest common prefix string amongst an array of strings.Personal tips:就是每一个字符串从头开始遍历，代码如下：class Solution {public: string longestCommonPrefix(vector<string>& s...

2018-03-11 17:15:31 158

原创 [LeetCode]13. Roman to Integer（自学留存）

Given a roman numeral, convert it to an integer.Input is guaranteed to be within the range from 1 to 3999.Personal tips:建立map储存罗马数字I,V,X,L,C,D,M，根据规则，小的数字在大的前面则减，在后则加。代码如下：class Solution {public: So...

2018-03-11 16:29:46 153

原创 [LeetCode]12. Integer to Roman（自学留存）

Given an integer, convert it to a roman numeral.Input is guaranteed to be within the range from 1 to 3999.Personal Tips: 使用map，记录1，5，10，50，100，500，1000分别对应的罗马数字，以及其规则。代码如下：class Solution{public: So...

2018-03-10 23:23:59 140

原创 [LeetCode]11. Container With Most Water（自学留存）

Given n non-negative integers a1, a2, ..., an, where each represents a point at coordinate (i, ai). n vertical lines are drawn such that the two endpoints of line i is at (i, ai) and (i, 0). Find two ...

2018-03-10 23:22:15 145

原创 [LeetCode]10. Regular Expression Matching（自学留存）

Implement regular expression matching with support for '.' and '*'.'.' Matches any single character.'*' Matches zero or more of the preceding element.The matching should cover the entire input stri...

2018-03-08 21:04:56 145

原创 [LeetCode]9. Palindrome Number（自学留存）

Determine whether an integer is a palindrome. Do this without extra space.Personal tips:利用c++新特性to_string函数转换成string然后首尾比较，代码如下：class Solution {public: bool isPalindrome(int x) { if (x < 0) ret...

2018-03-06 19:17:49 263

原创 [LeetCode]8.String to Integer (atoi)（自学留存）

Implement atoi to convert a string to an integer.Hint: Carefully consider all possible input cases. If you want a challenge, please do not see below and ask yourself what are the possible input cases....

2018-03-05 20:11:48 155

原创 [LeetCode]7. Reverse Integer（自学留存）

Given a 32-bit signed integer, reverse digits of an integer.Example 1:Input: 123Output: 321Example 2:Input: -123Output: -321Example 3:Input: 120Output: 21Note:Assume we are dealing with an envi...

2018-03-01 21:08:05 160

原创 [LeetCode]6. ZigZag Conversion（自学留存）

The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility)P A H NA P L S I I G...

2018-02-28 13:07:44 139

原创 [LeetCode] 3. Longest Substring Without Repeating Characters（自学留存）

Given a string, find the length of the longest substring without repeating characters.Examples:Given "abcabcbb", the answer is "abc", which the length is 3.Given "bbbbb", the answer is "b", with the l...

2018-02-27 16:52:50 128

原创 [LeetCode]2.Add Two Numbers(自学留存）

You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a link...

2018-02-26 23:58:48 156

原创 [leetCode]1. Two Sum（自学留存）

Given an array of integers, return indices of the two numbers such that they add up to a specific target.You may assume that each input would have exactly one solution, and you may not use the same el...

2018-02-25 15:55:55 140

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