python爬虫爬取网站图片保存本地

初学爬虫，将自己成功的案例贴上与大家一起进步学习。
所需环境
pycharm，第三方包下载了requests，bs4，lxml，urllib
大佬的爬虫第三方库

爬取网站图片，我选择的是这个不错的美图网站
http://www.win4000.com/

爬取过程比较顺利，直接上代码：

import time
import urllib
import requests
from bs4 import BeautifulSoup
import lxml
import re
import os

#得到页面html代码
def getPage(url):
    headers = {'User-Agent':"User-Agent:Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"}
    html = requests.get(url,headers=headers).content.decode('utf-8')
    return html

#输入图片的网络url路径和存储路径进行存储操作
def savaImg(picurl,saveurl):
    bytes = urllib.request.urlopen(picurl)
    file = open(saveurl,'wb')
    file.write(bytes.read())
    file.flush()
    file.close()
    return True

def findCount(html):
    pattern = re.compile('（<span>1</span>/<em>(.*)</em>）')
    try:
        Count = int(re.search(pattern,html).group(1))
        return Count
    except:
        print('找不见多少页')
        return 0

#创建文件夹
def mkdir(path):
    path = path.strip()
    isExists = os.path.exists(path)

    if not isExists:
        print('创建文件夹'+path)
        os.makedirs(path)
        return True
    else:
        print('文件夹已经创建')
        return False

start = time.clock()
url = "http://www.win4000.com/meinvtag7_1.html"  #爬取网页路径
html = getPage(url)
soup = BeautifulSoup(html,'lxml')
picturelink = soup.find('div',class_='w1180 clearfix').find_all('a')
pictureimg = soup.find('div',class_='w1180 clearfix').find_all('img')
#print(picturelink[0]['href'])

count = 0
for img in pictureimg:
    print(img['alt'],img['data-original'])
    mkdir('C:/Users/Lenovo/Desktop/wormpicture/'+img['alt'])#创建文件夹

    diru = 'C:/Users/Lenovo/Desktop/wormpicture/'+img['alt']+'/'
    newurl = picturelink[count]['href']
    newhtml = getPage(newurl)
    piccount = findCount(newhtml) #该套图多少张图片

    loadnumber=0
    while loadnumber<piccount:
        soup1 = BeautifulSoup(newhtml,'lxml')
        largepicurl = soup1.find('img',class_='pic-large')['url']
        if savaImg(largepicurl,diru+str(loadnumber)+'.jpg'):
            print('保存成功'+img['alt']+'('+str(loadnumber+1)+'/'+str(piccount)+')')
        nextlink = soup1.find('div',class_='pic-next').find('a')['href']#下一张图片链接
        newhtml = getPage(nextlink)
        loadnumber+=1
    count+=1

end = time.clock()
print('下载成功，花费'+str(end-start)+'秒')