feiji110

import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
from sklearn.externals import joblib

iris = joblib.load('later.pkl')
data = pd.DataFrame(iris,index = range(0,150),columns=['a','b','c','d','e'])
X = data.loc[:,'a':'d']
y = data['e']

feiji110

按照绝对值排序

def foo(x):
    return abs(x)
sorted(list1,key=foo)

list1 = [3,5,-4,-1,0,-2,-6]
list2 = sorted(list1, key=lambda x: abs(x))
print(list2)#[0, -1, -2, 3, -4, 5, -6]

feiji110

私有属性的getter与setter,以及只读属性的设置

class screen():
    @property #私有属性的getter
    def height(self):
        return self.__height
    @height.setter #私有属性的setter
    def height(self,heights):
        self.__height = heights
 @property

feiji110

class A():
    count = 0
    def __init__(self):
        A.count += 1
    @classmethod #参数指向当前类
    def kid(cls):
        print('A has',cls.count,'little objects')
    @staticmethod#静态方法 不需要参数 仅仅组织代码
 def static_method():

feiji110

不断否定自己，但要坚持最初的意愿——不论战术上如何变化，千万不要忘记战略目标。