<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[Draymond_666的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/Draymond_666</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; Draymond_666]]></copyright><item><title><![CDATA[快速解决 Jupyter 无法启动虚拟环境的问题“ImportError: DLL load failed while importing error”]]></title><link>https://blog.youkuaiyun.com/Draymond_666/article/details/114040739</link><guid>https://blog.youkuaiyun.com/Draymond_666/article/details/114040739</guid><author>Draymond_666</author><pubDate>Wed, 24 Feb 2021 20:51:29 +0800</pubDate><description><![CDATA[使用 Jupyter Notebook 或 Jupyter Lab 时，常常需要使用虚拟环境的内核。然而实际启动时可能会出现 zmq 包的 ImportError 报错，导致无法正常使用内核。因此，可以使用 conda 的 install 命令安装其他版本的 pyzmq 包以解决该问题。]]></description><category></category></item><item><title><![CDATA[无需安装VS，一行命令解决"Unable to find vcvarsall.bat"]]></title><link>https://blog.youkuaiyun.com/Draymond_666/article/details/85091235</link><guid>https://blog.youkuaiyun.com/Draymond_666/article/details/85091235</guid><author>Draymond_666</author><pubDate>Wed, 19 Dec 2018 12:55:12 +0800</pubDate><description><![CDATA[在运行带Cython模块的py文件时，有可能遇到如下报错：
error: Unable to find vcvarsall.bat

Reference: python - Windows 10 and Unable to find vcvarsall.bat - Stack Overflow
你好！ 这是你第一次使用 Markdown编辑器 所展示的欢迎页。如果你想学习如何使用Markdown编...]]></description><category></category></item><item><title><![CDATA[Python习题——2018-06-13作业]]></title><link>https://blog.youkuaiyun.com/Draymond_666/article/details/80738926</link><guid>https://blog.youkuaiyun.com/Draymond_666/article/details/80738926</guid><author>Draymond_666</author><pubDate>Tue, 19 Jun 2018 20:51:35 +0800</pubDate><description><![CDATA[Scikit-Learn 练习题

 




Code

from sklearn import datasets, cross_validation, metrics
from sklearn.naive_bayes import GaussianNB
from sklearn.svm import SVC
from sklearn.ensemble import RandomForestCl...]]></description><category></category></item><item><title><![CDATA[Python习题——2018-06-06作业]]></title><link>https://blog.youkuaiyun.com/Draymond_666/article/details/80613175</link><guid>https://blog.youkuaiyun.com/Draymond_666/article/details/80613175</guid><author>Draymond_666</author><pubDate>Fri, 08 Jun 2018 11:32:17 +0800</pubDate><description><![CDATA[Scipy 练习题



Exercise 10.1: Least squares

　　Generate matrix A∈Rm×nA∈Rm×nA \in R^{m \times n} with m&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;gt;nm&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;gt;nm &amp;amp;amp;amp;amp;amp;amp;amp;amp;gt; n. Also generate]]></description><category></category></item><item><title><![CDATA[Python习题——2018-05-30作业]]></title><link>https://blog.youkuaiyun.com/Draymond_666/article/details/80516269</link><guid>https://blog.youkuaiyun.com/Draymond_666/article/details/80516269</guid><author>Draymond_666</author><pubDate>Wed, 30 May 2018 23:54:19 +0800</pubDate><description><![CDATA[Scipy 练习题

Exercise 10.1: Least squares

　　Generate matrix A∈Rm×nA∈Rm×nA \in R^{m \times n} with m&amp;amp;amp;amp;amp;gt;nm&amp;amp;amp;amp;amp;gt;nm &amp;amp;amp;amp;gt; n. Also generate some vector b∈Rmb∈Rmb \in R^m.

　　Now find x=argminx∥Ax−b∥2x=arg⁡mi]]></description><category></category></item><item><title><![CDATA[Python习题——2018-05-23作业]]></title><link>https://blog.youkuaiyun.com/Draymond_666/article/details/80437997</link><guid>https://blog.youkuaiyun.com/Draymond_666/article/details/80437997</guid><author>Draymond_666</author><pubDate>Fri, 25 May 2018 23:19:39 +0800</pubDate><description><![CDATA[Matplotlib 练习题

Exercise 11.1: Plotting a function 
　　Plot the functionf(x)=sin2(x−2)e−x2f(x)=sin2(x−2)e−x2f(x)=sin^2(x-2)e^{-x^2}over the interval [0, 2]. Add proper axis labels, a title, etc.

impor...]]></description><category></category></item><item><title><![CDATA[Python习题——2018-05-16作业]]></title><link>https://blog.youkuaiyun.com/Draymond_666/article/details/80381119</link><guid>https://blog.youkuaiyun.com/Draymond_666/article/details/80381119</guid><author>Draymond_666</author><pubDate>Mon, 21 May 2018 00:39:09 +0800</pubDate><description><![CDATA[Numpy 练习题

Generate matrices AAA, with random Gaussian entries, BBB, a Toeplitz matrix, where A∈Rn×mA∈Rn×mA \in R^{n×m} and B∈Rm×mB∈Rm×mB \in R^{m×m}, for n = 200, m = 500.

Exercise 9.1: Matrix opera...]]></description><category></category></item><item><title><![CDATA[Python习题——2018-05-02作业]]></title><link>https://blog.youkuaiyun.com/Draymond_666/article/details/80260023</link><guid>https://blog.youkuaiyun.com/Draymond_666/article/details/80260023</guid><author>Draymond_666</author><pubDate>Wed, 09 May 2018 21:52:30 +0800</pubDate><description><![CDATA[Maximum Subarray



题目链接：LeetCode #53



题目描述

Given an array nums of n integers and an integer target, find three integers in nums such that the sum is closest to target. Return the sum of the three ...]]></description><category></category></item><item><title><![CDATA[Python习题——2018-04-25作业]]></title><link>https://blog.youkuaiyun.com/Draymond_666/article/details/80087456</link><guid>https://blog.youkuaiyun.com/Draymond_666/article/details/80087456</guid><author>Draymond_666</author><pubDate>Wed, 25 Apr 2018 23:08:34 +0800</pubDate><description><![CDATA[16. 3Sum Closest

题目链接：LeetCode #16

题目描述

Given an array nums of n integers and an integer target, find three integers in nums such that the sum is closest to target. Return the sum of the three inte...]]></description><category></category></item><item><title><![CDATA[Python习题——2018-04-23作业]]></title><link>https://blog.youkuaiyun.com/Draymond_666/article/details/80055015</link><guid>https://blog.youkuaiyun.com/Draymond_666/article/details/80055015</guid><author>Draymond_666</author><pubDate>Mon, 23 Apr 2018 20:52:10 +0800</pubDate><description><![CDATA[11. Container With Most Water

题目链接：LeetCode #11

题目描述

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 e...]]></description><category></category></item><item><title><![CDATA[Python习题——2018-04-09作业]]></title><link>https://blog.youkuaiyun.com/Draymond_666/article/details/79879867</link><guid>https://blog.youkuaiyun.com/Draymond_666/article/details/79879867</guid><author>Draymond_666</author><pubDate>Tue, 10 Apr 2018 13:24:02 +0800</pubDate><description><![CDATA[11-1 城市和国家：编写一个函数，它接受两个形参：一个城市名和一个国家名。这个函数返回一个格式为City, Country的字符串，如Santiago, Chile。将这个函数存储在一个名为city_functions.py的模块中。

创建一个名为test_cities.py的程序，对刚编写的函数进行测试（别忘了，你需要导入模块unittest以及要测试的函数）。编写一个名为test_city...]]></description><category></category></item><item><title><![CDATA[Python习题——2018-04-04作业]]></title><link>https://blog.youkuaiyun.com/Draymond_666/article/details/79822862</link><guid>https://blog.youkuaiyun.com/Draymond_666/article/details/79822862</guid><author>Draymond_666</author><pubDate>Wed, 04 Apr 2018 22:24:42 +0800</pubDate><description><![CDATA[10-4 访客名单：编写一个while循环，提示用户输入其名字。用户输入其名字后，在屏幕上打印一句问候语，并将一条访问记录添加到文件guest_book.txt中。确保这个文件中的每条记录都独占一行。



filename = 'guest_book.txt'

with open(filename, 'a') as file_object:
    while True:
        na...]]></description><category></category></item><item><title><![CDATA[Python习题——2018-04-02作业]]></title><link>https://blog.youkuaiyun.com/Draymond_666/article/details/79792009</link><guid>https://blog.youkuaiyun.com/Draymond_666/article/details/79792009</guid><author>Draymond_666</author><pubDate>Mon, 02 Apr 2018 17:46:12 +0800</pubDate><description><![CDATA[9-1 餐馆：创建一个名为Restaurant的类，其方法__init__()设置两个属性：restaurant_name和cuisine_type。创建一个名为describe_restaurant()的方法和一个名为open_restaurant()的方法，其中前者打印前述两项信息，而后者打印一条消息，指出餐馆正在营业。 
根据这个类创建一个名为restaurant的实例，分别打印其两个属性，...]]></description><category></category></item><item><title><![CDATA[Python习题——2018-03-28作业]]></title><link>https://blog.youkuaiyun.com/Draymond_666/article/details/79735477</link><guid>https://blog.youkuaiyun.com/Draymond_666/article/details/79735477</guid><author>Draymond_666</author><pubDate>Thu, 29 Mar 2018 00:12:22 +0800</pubDate><description><![CDATA[8-2 喜欢的图书：编写一个名为favorite_book()的函数，其中包含一个名为title的形参。这个函数打印一条消息，如One of my favorite books is Alice in Wonderland。调用这个函数，并将一本图书的名称作为实参传递给它。



def favorite_book(book):
    print('One of my favorite book...]]></description><category></category></item><item><title><![CDATA[Python习题——2018-03-26作业]]></title><link>https://blog.youkuaiyun.com/Draymond_666/article/details/79696623</link><guid>https://blog.youkuaiyun.com/Draymond_666/article/details/79696623</guid><author>Draymond_666</author><pubDate>Mon, 26 Mar 2018 17:39:48 +0800</pubDate><description><![CDATA[7-3 10的整数倍：让用户输入一个数字，并指出这个数字是否是10的整数倍。



num = int(input('Please input a number: '))
if num % 10 == 0:
    print(&quot;It's divisible by 10.&quot;)
else:
    print(&quot;It's not divisible by 10.&quot;)

输入：



20

输出：
...]]></description><category></category></item><item><title><![CDATA[Python习题——2018-03-21作业]]></title><link>https://blog.youkuaiyun.com/Draymond_666/article/details/79646218</link><guid>https://blog.youkuaiyun.com/Draymond_666/article/details/79646218</guid><author>Draymond_666</author><pubDate>Wed, 21 Mar 2018 21:56:58 +0800</pubDate><description><![CDATA[6-2 喜欢的数字：使用一个字典来存储一些人喜欢的数字。请想出5个人的名字，并将这些名字用作字典中的键；想出每个人喜欢的一个数字，并将这些数字作为值存储在字典中。打印每个人的名字和喜欢的数字。为让这个程序更有趣，通过询问朋友确保数据是真实的。favorite_num = {'alice': 1, 'bob': 2, 'carol': 3, 'dog': 233, 'egg': 23333}
for...]]></description><category></category></item><item><title><![CDATA[Python习题——2018-03-19作业]]></title><link>https://blog.youkuaiyun.com/Draymond_666/article/details/79614341</link><guid>https://blog.youkuaiyun.com/Draymond_666/article/details/79614341</guid><author>Draymond_666</author><pubDate>Mon, 19 Mar 2018 18:05:17 +0800</pubDate><description><![CDATA[5-6 人生的不同阶段：设置变量age的值，再编写一个if-elif-else结构，根据age的值判断处于人生的哪个阶段。如果一个人的年龄小于2岁，就打印一条消息，指出他是婴儿。如果一个人的年龄为2（含）～4岁，就打印一条消息，指出他正蹒跚学步。如果一个人的年龄为4（含）～13岁，就打印一条消息，指出他是儿童。如果一个人的年龄为13（含）～20岁，就打印一条消息，指出他是青少年。如果一个人的年龄为...]]></description><category></category></item><item><title><![CDATA[Python习题——2018-03-14作业]]></title><link>https://blog.youkuaiyun.com/Draymond_666/article/details/79561821</link><guid>https://blog.youkuaiyun.com/Draymond_666/article/details/79561821</guid><author>Draymond_666</author><pubDate>Wed, 14 Mar 2018 23:02:21 +0800</pubDate><description><![CDATA[4-2 动物：想出至少三种有共同特征的动物，将这些动物的名称存储在一个列表中，再使用for循环将每种动物的名称都打印出来。修改这个程序，使其针对每种动物都打印一个句子，如&quot;A dog would make a great pet&quot;。在程序末尾添加一行代码，指出这些动物的共同之处，如打印诸如&quot;Any of these animals would make a great pet!&quot;这样的句子。ani...]]></description><category></category></item><item><title><![CDATA[Python习题——2018-03-12作业]]></title><link>https://blog.youkuaiyun.com/Draymond_666/article/details/79530469</link><guid>https://blog.youkuaiyun.com/Draymond_666/article/details/79530469</guid><author>Draymond_666</author><pubDate>Mon, 12 Mar 2018 19:58:06 +0800</pubDate><description><![CDATA[3-3 自己的列表：想想你喜欢的通勤方式，如骑摩托车或开汽车，并创建一个包含多种通勤方式的列表。根据该列表打印一系列有关这些通勤方式的宣言，如&quot;I would like to own a Honda motorcycle&quot;。vehicles = ['bicycle', 'subway']
message = &quot;I prefer riding the ofo &quot; + vehicles[0] + &quot;....]]></description><category></category></item><item><title><![CDATA[Python习题——2018-03-07作业]]></title><link>https://blog.youkuaiyun.com/Draymond_666/article/details/79486929</link><guid>https://blog.youkuaiyun.com/Draymond_666/article/details/79486929</guid><author>Draymond_666</author><pubDate>Thu, 08 Mar 2018 18:35:39 +0800</pubDate><description><![CDATA[2-1 简单消息：将一条消息存储到变量中，再将其打印出来。message = 'Hello, world!'
print(message)2-2 多条简单消息：将一条消息存储到变量中，将其打印出来；再将变量的值修改为一条新消息，并将其打印出来。message = 'Hello, world!'
print(message)
message = 'Hello, python!'
print(mess...]]></description><category></category></item></channel></rss>