天上掉下两毛钱

encode按照指定方式进行编码，decode将对应的编码转化为utf-8编码所对应的字符。‘hex’代表以16进制进行编码，str = '\x35'.encode('hex')print strstr = '9'.encode('hex') #39print strstr = '10'.encode('hex') #3130print strstr = '11'.e...

不是函数，则程序按照顺序从上到下执行if __name__=='__main__':是测试时使用

文件->settings  点右侧绿色加号  搜索对应的包名  点instal即可l

需要 requests 包，需要环境变量的配置# -*- coding:utf-8 -*-import re # 导入正则表达式模块，提取网页中所需要的内容import requests import random # 随机生成一个实数，它的取值范围[0,1]def spiderPic(html,keyword): print '正在查找 ：' + keyword

五、函数：1、#定义函数关键字、函数名、参数def print_sum(start,stop):    result=0    for i in range (start,stop+1):        result+=i    print "sum is",result2、#局部变量x=1def f():    print x

Pythong 基本语法一、输入：money=raw_input("输入奖金 金额：")   #读取键盘输入，将所有输入作为字符串看待float(raw_input("输入奖金 金额："))   #强制转化为浮点型数据二、输出：打印print n,     #带,号可以空一个空格在一行输出，不带的话会在一列输出print format(i*j,'3d'),

for b in range(1,5): for s in range (1,5): for g in range (1,5): if b!=s and b!=g and s!=g: print b,s,g //====================================================

import smtplibfrom email.header import Headerfrom email.mime.text import MIMEText# 第三方 SMTP 服务mail_host = "smtp.163.com" # SMTP服务器mail_user = "****@163.com" # 用户名mail_pass...

from selenium import webdriverfrom selenium.webdriver.common.by import Byfrom selenium.webdriver.support.ui import WebDriverWaitfrom selenium.webdriver.support import expected_conditions as ECimpo...

import refrom multiprocessing import Pool #多线程import requestsfrom requests.exceptions import RequestException #添加异常def get_one_page(url): try: response=requests.get(url) i...

通过分析Ajax请求可以看到天猫评论的地址规律变化：http://rate.tmall.com/list_detail_rate.htm?itemId=560016036932&sellerId=2103295383&currentPage=1其中itemId是商品id，sellerid是卖家id，currentPage是页面号那么拿到一个商品的URL后，通过分析源代码可以筛选出 ...

1、使用PyCharm安装pymysql依次点击 File->settings->Project Interpreter 点击右侧绿色加号+ 输入pymysql 安装完成2、打开数据库创建一个测试表 create table student( date varchar(50), information varchar(1000));3、打开PyC...

from selenium import webdriverfrom selenium.webdriver.common.by import Byfrom selenium.webdriver.support.ui import WebDriverWaitfrom selenium.webdriver.support import expected_conditions as ECimpo...

import requestsfrom requests.exceptions import RequestExceptionimport reimport timenumber=0def get_one_html(url): try: response=requests.get(url) response.encoding = 'utf-8' ...

#-----随机函数--------from random import *print(random())print(randint(1,10))#生成一个[a,b]之间的整数print(uniform(1,10))#生成一个[a,b]之间的随机小数print(randrange(0,100,4))#从0开始到100以内以4递增的元素随机返回#-------匿名函数--...

import numpy as npimport operatorfrom os import listdirdef img2vector(filename): returnVect=np.zeros((1,1024)) fr=open(filename) for i in range(32): lineStr=fr.readline() ...

weekste="星期1星期2星期3星期4星期5星期6星期7"weekid=eval(input("输入一个星期数字："))pos=(weekid-1)*3print(weekste[pos:pos+3])import mathdayfactor=0.01dayup=math.pow((1.0+dayfactor),365)daydown=math.pow((1.0-dayfa...

import pygameimport timefrom pygame.locals import *import randomclass HeroPlan(object): def __init__(self,screen_temp): self.x=205 self.y=500 self.screen=screen_temp ...

import pygameimport timefrom pygame.locals import *import randomclass BasePlan(object): def __init__(self,screen_temp,x,y,imageload): self.x=x self.y=y self.screen=scre...

import pygameimport timefrom pygame.locals import *import randomclass BasePlan(object): def __init__(self,screen_temp,x,y,imageload): self.x=x self.y=y self.screen=scre...

dirname=r"C:\Users\Administrator\Desktop\1.txt"#-----写入文件-----for i in range(1,100): with open(dirname,'a',encoding='utf-8') as f: f.write(str(i)+'\n')#-----读入文件-----fo = open(dirname,...

n=1ls=[]def test1(): global n #用global可以修改全局变量 n=5test1()print("the number is :",n)def test2(): for i in range(10): ls.append(i) #函数内可以直接修改 列表的值test2()print("the list is...

图书来源：python语言程设计基础

# 查看当前目录的绝对路径:>>> os.path.abspath('.')'/Users/michael'# 在某个目录下创建一个新目录，首先把新目录的完整路径表示出来:>>> os.path.join('/Users/michael', 'testdir')'/Users/michael/testdir'# 然后创建一个目录:>>...

import pandas as pdimport numpy as np'''s = pd.Series([1,3,6,np.nan,44,1])print(s)0 1.01 3.02 6.03 NaN4 44.05 1.0dtype: float64''''''dates = pd.date_range('2016010...

s=open(r"C:\Users\lenovo\Desktop\test.csv",'w')s.close()with open(r"C:\Users\lenovo\Desktop\test.csv",'a') as q: with open(r'C:\Users\lenovo\Desktop\123.csv','r') as f: for i in f: ...

>> x = np.arange(3)>> xarray([0, 1, 2])>> x.shape(3,)>> x[:, np.newaxis]array([[0], [1], [2]])>> x[:, None]array([[0], [1], [2]])&...

import tensorflow as tfimport numpy as npimport matplotlib.pyplot as plt#随机生层200个随机点 在 -0.5到0.5之间 200个x_data=np.linspace(-0.5,0.5,200)[:,np.newaxis]noise=np.random.normal(0,0.02,x_data.shape)y...

import pygameimport timedef main(): screen=pygame.display.set_mode((1196,790),0,32) #窗口大小 background=pygame.image.load(r"C:\Users\Administrator\Desktop\aa.png") #图片位置 while True: #循...

from random import *s= open(r"C:\Users\Administrator\Desktop\submission.csv",'w')s.close()num=0with open(r"C:\Users\Administrator\Desktop\test1.csv",'r') as f: with open(r"C:\Users\Administra...

class Cat: def __init__(self,new_name,new_age): self.name=new_name self.age=new_age def eat(self): print("%s is eating"%(self.name)) def it_age(self): print...

import pygameimport timefrom pygame.locals import *class HeroPlan(object): def __init__(self,screen_temp): self.x=205 self.y=500 self.screen=screen_temp self.im...

import tensorflow as tffrom tensorflow.examples.tutorials.mnist import input_datadef add_layer(inputs, in_size, out_size, activation_function=None): Weights = tf.Variable(tf.random_normal([in_s...

# coding: utf-8import tensorflow as tffrom tensorflow.examples.tutorials.mnist import input_data# 载入数据集mnist = input_data.read_data_sets("MNIST_data", one_hot=True)# 每个批次的大小batch_size = 100...

import pandas as pdimport sklearn.preprocessing as preprocessingfrom sklearn.neighbors import KNeighborsClassifierfrom sklearn.model_selection import train_test_splitfrom sklearn import metrics...

import pandas as pdimport sklearn.preprocessing as preprocessingdef make_data(): col_names = ["ID","K1K2驱动信号","电子锁驱动信号","急停信号","门禁信号","THDV-M","THDI-M","label"] data