# 导包 import numpy as np # 导入鸢尾花数据 from sklearn.datasets import load_iris data = load_iris() pental_len = data.data[:,2] # 计算鸢尾花花瓣长度的最大值，平均值，中值，均方差 pri... ...

A string S of lowercase letters is given. We want to partition this string into as many parts as possible so that each letter appears in at most one p ...

#求一元二次方程的解 import math def equation(a,b,c): h=b*b-4*a*c #一元二次方程的解，百度来的 if h>=0: x1=(-b+math.sqrt(h))/2*a #sqrt函数求平方根 x2=(-b-math.sqrt(h))/2*a print('x... ...

Implement int sqrt(int x). Compute and return the square root of x, where x is guaranteed to be a non-negative integer. Since the return type is an in ...

Centos防火墙及SELINUX关闭及yum源配置

Given a string and a string dictionary, find the longest string in the dictionary that can be formed by deleting some characters of the given string. ...

list_1=[1,4,5,7,6,3,7,9]list_1=set(list_1)#设置成集合去重集合是无序的#集合格式变量名=set(列表名)或变量名=set([,,])list_2=set([2,6,0,66,22,8,4])#print(list_1,list_2)#打印交集#print(list_1.intersection(list_2))#打印并集#print(list_1.unio

pip install MySQL-python时报错如下： Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/wk/541xl0m91gj7562sn0ddpjg9k8mh7p/T ...

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