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import requests rr=requests.get("https://api.github.com",auth=('user','pass')) print(rr.status_code) print(rr.headers['content-type']) 结果: RESTART: D: 阅读全文
posted @ 2020-02-16 18:19
myrj
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urls=[f'https://www.baidu.com/?page={page}' for page in range(1,5)] #F f大小写都可以 print(urls) page=10 url='https://www.baidu.com/?page={}'.format(page) p 阅读全文
posted @ 2020-02-16 16:43
myrj
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>>> b=(page for page in range(10))>>> print(b)<generator object <genexpr> at 0x0000000002EE61C8>>>> list(b) #只能生成一次[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]>>> l 阅读全文
posted @ 2020-02-16 16:32
myrj
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>>> a=[page for page in range(10)]>>> print (a)[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]>>> a=[page*2 for page in range(10)]>>> print(a)[0, 2, 4, 6, 8, 10, 12, 1 阅读全文
posted @ 2020-02-16 16:24
myrj
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//img/@src 得到所有img标签的src值 //a/text() 得到所有A标签中的文本 name=response.xpath('//img@src').getall() #getall()从对象中获取具体值 import requests,re from lxml import etre 阅读全文
posted @ 2020-02-16 16:00
myrj
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