爬虫如何用一个循环写出4个变量

Question

https://sp0.baidu.com/8aQDcjqpAAV3otqbppnN2DJv/api.php?resource_id=28286&from_mid=1&&format=json&ie=utf-8&oe=utf-8&query=%E7%94%B5%E5%BD%B1&sort_key=16&sort_type=1&stat0=%E7%88%B1%E6%83%85&stat1=%E5%A4%A7%E9%99%86&stat2=2017&stat3=&pn=0

这里面 stat0 stat1 stat2 都固定有9种左右
pn是以8的倍数递增

urlbase = "https://sp0.baidu.com/8aQDcjqpAAV3otqbppnN2DJv/api.php?resource_id=28286&from_mid=1&&format=json&ie=utf-8&oe=utf-8&query=%E7%94%B5%E5%BD%B1&sort_key=16&sort_type=1&stat0=&stat1=&stat2=&stat3=&pn="
urllist =[]
for i in range(1,124):
        url = urlbase+str(8*i)
        urllist.append(url)

现在想写一个循环能够把所有种类都放入一个list 不知道怎么办了= =

Answer 1

这里你可以用format来实现，在链接中置入占位符{}，后面统一赋值：

urlbase = "https://sp0.baidu.com/8aQDcjqpAAV3otqbppnN2DJv/api.php?resource_id=28286&from_mid=1&&format=json&ie=utf-8&oe=utf-8&query=%E7%94%B5%E5%BD%B1&sort_key=16&sort_type=1&stat0={0}&stat1={1}&stat2={2}&stat3={3}&pn={4}"

urllist =[]
for i in range(1,124):
    stat0 = i   # 定义值，我不知道你的值是怎么定义的，用i举例
    stat1 = i
    stat2 = i
    stat3 = i
    pn = 8*i
    url = urlbase.format(stat0, stat1, stat2, stat3, pn)
    urllist.append(url)