# coding=utf-8
"""根据搜索词下载百度图片"""
import re
import sys
import urllib

import requests


def get_onepage_urls(onepageurl):
    """获取单个翻页的所有图片的urls+当前翻页的下一翻页的url"""
    if not onepageurl:
        print(\'已到最后一页, 结束\')
        return [], \'\'
    try:
        html = requests.get(onepageurl).text
    except Exception as e:
        print(e)
        pic_urls = []
        fanye_url = \'\'
        return pic_urls, fanye_url
    pic_urls = re.findall(\'"objURL":"(.*?)",\', html, re.S)
    fanye_urls = re.findall(re.compile(r\'<a href="(.*)" class="n">下一页</a>\'), html, flags=0)
    fanye_url = \'http://image.baidu.com\' + fanye_urls[0] if fanye_urls else \'\'
    return pic_urls, fanye_url


def down_pic(pic_urls):
    """给出图片链接列表, 下载所有图片"""
    for i, pic_url in enumerate(pic_urls):
        try:
            pic = requests.get(pic_url, timeout=15)
            string = str(i + 1) + \'.jpg\'
            with open(string, \'wb\') as f:
                f.write(pic.content)
                print(\'成功下载第%s张图片: %s\' % (str(i + 1), str(pic_url)))
        except Exception as e:
            print(\'下载第%s张图片时失败: %s\' % (str(i + 1), str(pic_url)))
            print(e)
            continue


if __name__ == \'__main__\':
    keyword = \'bus\'  # 关键词, 改为你想输入的词即可, 相当于在百度图片里搜索一样
    url_init_first = r\'http://image.baidu.com/search/flip?tn=baiduimage&ipn=r&ct=201326592&cl=2&lm=-1&st=-1&fm=result&fr=&sf=1&fmq=1497491098685_R&pv=&ic=0&nc=1&z=&se=1&showtab=0&fb=0&width=&height=&face=0&istype=2&ie=utf-8&ctd=1497491098685%5E00_1519X735&word=\'
    url_init = url_init_first + urllib.quote(keyword, safe=\'/\')
    all_pic_urls = []
    onepage_urls, fanye_url = get_onepage_urls(url_init)
    all_pic_urls.extend(onepage_urls)

    fanye_count = 0  # 累计翻页数
    while 1:
        onepage_urls, fanye_url = get_onepage_urls(fanye_url)
        fanye_count += 1
        print(\'第%s页\' % fanye_count)
        if fanye_url == \'\' and onepage_urls == []:
            break
        all_pic_urls.extend(onepage_urls)

    down_pic(list(set(all_pic_urls)))

 

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