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前言这篇文章只记录通过pip安装pytorch超时问题的解决方案。默认阅读者已经安装了Python2.7或者其他3.x的版本版本信息系统：macos-11.1pip：21.0.1python：3.8解决方案第一步：去官网查询合适的版本和命令第二步：>pip install torch torchvision torchaudioCollecting torch Downloading torch-1.7.1-cp38-none-macosx_10_9_x86_64.w

原题链接：Implement strStr()题目内容： Return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack.Example 1: Input: haystack = “hello”, needle = “ll” Out...

ValueError: Invalid control character at: line 1 column 122(char 123)出现错误的原因是字符串中包含了回车符（\r）或者换行符（\n） 解决方案：转义json_data = json_data.replace('\r', '\\r').replace('\n', '\\n')使用关键字strict...

原题链接：Reverse Integer题目内容： Given a 32-bit signed integer, reverse digits of an integer.Example 1: Input: 123 Output: 321Example 2: Input: -123 Output: -321Example 3: Input:...

原题链接：String to Integer (atoi)题目内容： 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 your...

1. Requests模块import requests print "download with requests"url = 'https://linux.linuxidc.com/linuxconf/download.php?file=Li9saW51eGZpbGVzL0xpbnV4JUI5JUFCJUM5JUU3LnBuZw==' r = requests.get(url) ...

新增数据user = User(name='a')session.add(user)user = User(name='b')session.add(user)user = User(name='a')session.add(user)user = User()session.add(user)session.commit()使用User表相关操作from sq...

原题链接：Merge Sorted Array题目内容： Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array.Note:The number of elements initialized in nums1 and nums2 are m and n r...

原题链接：Remove Nth Node From End of List题目内容： Given a linked list, remove the n-th node from the end of list and return its head.Example: Given linked list: 1->2->3->4->5, and n = 2....

原题链接：Reverse Linked List题目内容： Reverse a singly linked list.Example: Input: 1->2->3->4->5->NULL Output: 5->4->3->2->1->NULL

\xa0是不间断空白符  我们通常所用的空格是 \x20，是在标准ASCII可见字符 0x20~0x7e 范围内。而 \xa0属于 latin1 （ISO/IEC_8859-1）中的扩展字符集字符，代表空白符nbsp(non-breaking space)。latin1 字符集向下兼容 ASCII （ 0x20~0x7e ）。inputstring = u'\n ...

方法1import difflibdef get_equal_rate(str1, str2): return difflib.SequenceMatcher(None, str1, str2).quick_ratio()方法2import Levenshteindef get_equal_rate(str1, str2): return Levenshtein.ratio...

内置函数文件读取通常我们在读取文件的时候，会用到read()， readline()， readlines()。read ()的方法是一次性把文件的内容以字符串的方式读到内存， 放到一个字符串变量中readlines()的方法是一次性读取所有内容， 并按行生成一个list因为read()和readlines()是一次性把文件加载到内存， 如果文件较大， 甚至比内存的大小还大， 内存就会爆...

原题链接：Plus One题目内容：Given a non-negative integer represented as a non-empty array of digits, plus one to the integer.You may assume the integer do not contain any leading zero, except the number 0 i...

原题链接：Move Zeroes题目内容：Given an array nums, write a function to move all 0’s to the end of it while maintaining the relative order of the non-zero elements.For example, given nums = [0, 1, 0, 3, 12]...

原题链接：Two Sum题目内容：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 ma...

使用tornado的模板的时候，会遇到一些情况，，而不是简单地字符串的规则。tornado模板为了安全性，默认会全部转义。如果需要直接渲染html代码内容，那么有以下两种方法：1. {% raw message %}2.{% autoescape None %}{{ title }}{{ escape(title) }}

出处# _*_ coding: utf-8 _*_"""类型和运算----类型和运算----类型和运算----类型和运算----类型和运算----类型和运算----类型和运算----类型和运算----类型和运算----类型和运算----类型和运算"""#-- 寻求帮助: dir(obj) # 简单的列出对象obj所包含的方法名称，返回一个字符串列表 ...

原题链接：Longest Common Prefix题目内容： Write a function to find the longest common prefix string amongst an array of strings.找到字符列表中的最长前缀，注意[], [“”], [“a”, “a”]这样的例子Pythonclass Solution(object):...

原题链接：Count and Say题目内容： The count-and-say sequence is the sequence of integers with the first five terms as following: 1 11 21 1211 111221 1 is read off as “one 1” or 11. 11 i...

原题链接：Valid Palindrome 题目内容： Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.For example, “A man, a plan, a canal: Panama” is a pa...

原题链接：Valid Anagram题目内容： Given two strings s and t, write a function to determine if t is an anagram of s.For example, s = “anagram”, t = “nagaram”, return true. s = “rat”, t = “car”, return fa...

原题链接：First Unique Character in a String题目内容： Given a string, find the first non-repeating character in it and return it’s index. If it doesn’t exist, return -1.Examples: s = “leetcode” re...

原题链接：Reverse String题目内容： Write a function that takes a string as input and returns the string reversed.Example: Given s = “hello”, return “olleh”.Pythonclass Solution(object): def...

原题链接：Power of Three题目内容： Given an integer, write a function to determine if it is a power of three.Follow up: Could you do it without using any loop / recursion?Credits: Special thanks to @d...

原题链接：Count Primes题目内容： Description:Count the number of prime numbers less than a non-negative number, n.Credits: Special thanks to @mithmatt for adding this problem and creating all test cases...

原题链接：Fizz Buzz题目内容：Write a program that outputs the string representation of numbers from 1 to n.But for multiples of three it should output “Fizz” instead of the number and for the multiples of f...

原题链接：Valid Sudoku题目内容：Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules.The Sudoku board could be partially filled, where empty cells are filled with the character ‘.’. A...

转载自：http://www.cnblogs.com/dkblog/archive/2011/10/10/2205200.html资料： Python官方Doc：《20.15. uuid — UUID objects according to RFC 4122》 UUID的算法介绍：《A Universally Unique IDentifier (UUID) URN