wlllssd的博客

测试一下第一个博客，看一下效果。 先输入一个C++代码： #include <iostream> using namespace std; int main(int argc, char const *argv[]) { cout << "Hello World!" << endl; return 0; } 再输入...

11.1 代码： #city_functions.py def city_country(city,country): return(city.title()+', '+country.title()) #test_cities.py import unittest from city_functions import city_country class CitiesTest(uni...

561. Array Partition I Given an array of 2n integers, your task is to group these integers into n pairs of integer, say (a1, b1), (a2, b2), …, (an, bn) which makessum ofmin(ai, bi) for all i from 1...

4.Median of Two Sorted Arrays There are two sorted arraysnums1andnums2of size m and n respectively. Find the median of the two sorted arrays. The overall run time complexity should be O(log ...

746.Min Cost Climbing Stairs On a staircase, thei-th step has some non-negative costcost[i]assigned (0 indexed). Once you pay the cost, you can either climb one or two steps. You need to find...

题目： 代码： from scipy import linalg import numpy as np n=200 m=500 A = np.random.normal(0,1,n*m).reshape(n,m) B = linalg.toeplitz(list(range(0,m))) 题目9.1： 代码： # 9.1 def fun1(x): # A(B - λ*I) ...

题目11.1 代码： from scipy import linalg import numpy as np from matplotlib import pyplot #11.1 X = np.arange(0, 2.05, 0.05) Y = np.sin((X - 2) * np.exp(-X ** 2)) ** 2 pyplot.plot(X, Y) pyplot.title("...

题目10.1： 代码： import numpy as np from scipy.linalg import * m=10 n=5 A = np.random.randint(0,30,size=(m,n)) b = np.random.randint(0,20,size=(m,1)) x, res, rnk, s = lstsq(A, b) b1 = norm(b-...

题目1： 代码1： # your code here x_mean=anascombe.groupby('dataset')['x'].mean() y_mean=anascombe.groupby('dataset')['y'].mean() x_var=anascombe.groupby('dataset')['x'].var() y_var=anascombe.groupb...

代码： #10.1 print(10.1) filename = 'test.txt' print("直接读取") with open(filename) as file: contents = file.read(); print(contents) print("逐行存储后读取") sentences = [] with open(filename) as file: for li...

代码： #9.1 print(9.1) class Restaurant(): def __init__(self,name,cuisine_type,number_served=0): self.name = name self.cuisine_type = cuisine_type self.number_served = number_served def descri...

python主页上一进去就有图片的展示，其中显示了python最吸引人的五大特性。整个网页的布局也十分简洁明了，非常的干净，与python其语言本身的风格保持了高度的一致性。 在主页上捣腾了一阵，发现其中提供了一个在线的console可以在其中编写python的程序，我试用了一下，确实是可以使用的。 许多公司都使用python进行编程开发，包括Youtube, Go...

代码： # 2.1 print("2.1") str1 = "Python is interesting." print(str1) #2.2 print("2.2") str2 = "Python is interesting." print(str2) str2 = "C++ is interesting." print(str2) #2.3 print("2.3") str3

代码： #3.1 names = ['alan','jade','mike'] for i in names: print(i,end=" ") print() #3.2 for i in names: print(i+", are you ok?") print() #3.3 str3 = ['car','bike','bus'] for i in str3: print("I l...

代码： #4.1 print(4.1) list1 = ['chicken','beef','fish'] for i in list1: print("I like " + i + " pizza.") print("I really love pizza!") #4.2 print(4.2) list2 = ['dog','cat','wolf'] for i in list2: p...

代码： #5.1 #print(5.1) #print("一个简单的条件测试，可以理解比较后为何返回True或False") #有点长，以及简单，就不写了 #5.2 print(5.2) #前面几个都比较简单，就不写了 #写一下特定的值在列表中的查找 list2 = ["one","two","three",1,2,3] if "one" in list2: print("one in l.

代码： #6.1 print(6.1) friend_information = { 'first_name' : 'Jack', 'last_name' : 'Ma', 'age' : 18, 'living city' : 'Hong Kong'} for key,value in friend_information.items(): print(key,":",value)...

代码： #7.3 print(7.3) num3 = int(input("Please input a num:")) if num3 % 10 == 0: print(str(num3)+" is a multiplier of 10.") else: print(str(num3)+" is not a multiplier of 10.") print() #7.8 print(...

代码： #8.1 def display_message(): print(8.1) print("display_message function runs.") print() display_message() #8.2 def favorite_book(book_name): print("My favorite book is "+book_name+".") print...

题目： 步骤一： 代码： from sklearn import datasets X,Y=datasets.make_classification(n_samples=1000,n_features=10,n_classes=2) print(X) print(Y) 输出： [[-1.80647012 -1.43419604 -0.28311776 ... -0.53762...