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RSS订阅原创 classification dataset 分类数据集
import numpy as np X = np.array([[-1, -1], [-2, -1], [-3, -2], [1, 1], [2, 1], [3, 2]]) Y = np.array([1, 1, 1, 2, 2, 2]) from sklearn.naive_bayes import GaussianNB clf = GaussianNB() #拟合数据 clf.fit(X, ...
2018-06-30 14:53:46
3530
原创 Anscombe's quartet
%matplotlib inline import random import numpy as np import scipy as sp import pandas as pd import matplotlib.pyplot as plt import seaborn as sns import statsmodels.api as sm import statsmodels.form...
2018-06-09 14:05:05
296
原创 13 Iterators
import numpy as np #13.1 def collatz(n): if n % 2 == 0: yield n // 2 else: yield 3 * n + 1 if __name__ == '__main__': n = input() print(collatz(int(n))) n = colla...
2018-06-01 12:28:05
177
原创 Matplotlib
# -*- coding: utf-8 -*- import matplotlib #https://blog.youkuaiyun.com/zjjtilm/article/details/79106348 #导入包 import matplotlib.pyplot as plt import numpy as np import math # 确定坐标轴 plt.xlim((-2, 2))...
2018-05-27 13:53:33
243
原创 Python 矩阵Numpy
import numpy as np a = np.array([(1,2),(-1,2)]) b = np.array([(2,3),(-1,2)]) #c = np.ones((2,2)) print(a) print(b) print('\n\n') #9-1 print(a + a) print(a * a.T) print(a.T * a) print(a * b) p = 1 x ...
2018-05-18 11:31:53
310
原创 Python 28
def strStr(haystack, needle): if not needle: return 0 for index, value in enumerate(haystack): if value==needle[0] and haystack[index:len(needle)+index]==needle: r...
2018-05-06 17:14:57
196
原创 python 算法作业 leetcode 7&258
#7 def reverse(x): x = int(str(x)[::-1]) if x >= 0 else - int(str(-x)[::-1]) return x if x < 2147483648 and x >= -2147483648 else 0#258 def addDigits(num): return 1 + (num - 1) % 9
2018-04-28 13:25:01
209
原创 leetcode 66
def plusOne(digits): a = 0 index = 1 count = 0 New = [] for digit in digits: a = a * 10 + digit index = index * 10 count = count + 1 a = a + 1 if a % 10 == 0: New.append(1) for...
2018-04-24 10:47:22
170
原创 Python 第十一章
def City(city, country, population): return city + ' ' + country + ' ' + population; class Employee(): def __init__(self, first_name, second_name, annual_salary): self.first_name = first_name ...
2018-04-09 21:41:43
157
原创 Python 第十章
#10-1 print('10-1') filename = 'learn.txt' with open(filename) as file_object: contents = file_object.read() lines = file_object.readlines() for line in file_object: print(line) print(contents) f...
2018-04-04 21:20:44
222
原创 Python 第九章
#9-6 print('9-6') class Restaurant(): def __init__(self, name, type): self.name = name self.type = type def describe_restaurant(self): print('The name of restaurant is :' + self.name) pri...
2018-04-02 13:27:09
237
原创 Python 第八章
#8-2 print('#8-2') def favorite_book(book): print('One of my favorite book is ' + book.title()) favorite_book('The Kite Runner') #8-3 print('#8-3') def make_shirt(size = 2, message = 'Love'): print...
2018-03-28 22:00:50
337
原创 Python 第七章
代码：#7-1 print('#7-1') car = input('Which car would you like ?\n') print('Let me see if I can find you a ' + car + ' .\n') #7-2 print('#7-2') number = input('How many people are in your dinner group ?...
2018-03-27 12:42:18
393
原创 Python 第六章
#6-1 print('6-1\n') Red = {'first_name':'Alan','last_name':'Waker','age':12,'city':'Beijing'} print(Red) #6-2 print('\n6-2\n') Love_number = {'A':1,'B':2,'C':3,'D':4,'E':5} print(Love_number) #6-5 p...
2018-03-21 21:30:59
166
原创 Python 第五章
源码：#5-3 print('5-3\n') alien_color = 'green' if alien_color == 'green': print('You have just earned 5 points!') else: print('') print('\n') alien_color = 'red' if alien_color == 'green': print('Y...
2018-03-19 20:51:03
318
原创 Python第四章 Working with Lists
#4-3 for value in range(1,21): print(value, end = ' ') print('\n') #4-6 for value in range(1,21,2): print(value, end = ' ') print('\n') #4-7 lists = [] for value in range(3,31,3): lists.append(...
2018-03-14 21:47:27
129
原创 Python 第三章Lists
#3-4 people = ['Jim', 'Tom', 'Hitler'] print(people) print(people[0] + " , would you like to have a dinner with me ?") print(people[1] + " , would you like to have a dinner with me ?") print(people[2]...
2018-03-12 13:35:45
166
原创 Python之变量和简单数据类型
1 习题2-3>>> print(name) Tom >>> print(name + ", would you like have a cup of tea?") Tom, would you like have a cup of tea?2 习题2-4>>> name = 'Tom' >>> print(n
2018-03-08 10:54:58
198
原创 初识Python
一、访问Python的发现和体会 在浏览Python的主页过程中，我发现 1 它的网站设计非常简明，突出重点。比如在网站的上面，点击menu后网站的左边，以及网站的下面都有网站地图, 列出了包括教程、下载、文档、工作和社区等等一系列重要的项目。 2 网站中最突出的是Python的特点和优点，给浏览网页的开发者提供一些使用它的理由。 ...
2018-03-06 21:55:42
129
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