使用列表推导式快捷生成python列表

最新推荐文章于 2024-07-12 20:01:06 发布

DingKin

最新推荐文章于 2024-07-12 20:01:06 发布

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文章标签： python 列表 url

本文链接：https://blog.youkuaiyun.com/DingKin/article/details/106180180

使用列表推导式快捷生成python列表

生成数字序列

a = [x for x in range(1,10)]
print(a)

运行结果如下：

>>> print(a)
[1, 2, 3, 4, 5, 6, 7, 8, 9]

生成字符串列标

在爬虫程序中，经常用到url的翻页拼接，根据页码变化生成字符串列标如下：

urlList = ['https://www.zdaye.com/search_projects_sx.jspx?page=1', 'https://www.zdaye.com/search_projects_sx.jspx?page=2', 'https://www.zdaye.com/search_projects_sx.jspx?page=3']

代码如下：

b = [x+1 for x in range(1,4)]
urlList = ['https://www.zdaye.com/search_projects_sx.jspx?page='+str(x) for x in b]
print(urlList)

运行结果如下：

>>> print(urlList)
['https://www.zdaye.com/search_projects_sx.jspx?page=1', 'https://www.zdaye.com/search_projects_sx.jspx?page=2', 'https://www.zdaye.com/search_projects_sx.jspx?page=3']