Question

我正在尝试生成一些链接。

注意：退货与打印存在问题。

当我用return编写代码时，它只返回一字：

运行此代码：

import requests
import re

wikiurl = 'https://en.wikipedia.org/wiki/List_of_states_and_territories_of_the_United_States'


state_pat = re.compile(r'title=\"(\w+)\">')

def get_page_content(url):
    response = requests.get(url)
    return response.text

def link_generator(wikiurl):
    content = get_page_content(wikiurl)
    names = state_pat.findall(content)
    for i in names:
        return 'https://www.local.com/business/results/listing.cfm?s=tile+and+grout+cleaning&ar=' + i + '%2CNY&gsp=ZFZWU1RaU09zWGNYdjFEV1l2ZHFLNVZUUFRPT3c3a21lbFVCbERQOU5VS3p6ai9DRXNMa29PcVZ0ZVV0TXZLM01wUVFUUHZYK2lrMnB5VGJyMHZJeUNoK1dXaUoxZ1NKT3AxbVlJOGN1aVBEb1NRMzlCemdDVHh5aGd3eU5DYUpKWDRtNFVQR0llOFJibUhQR3pSV3ppWFR4ekJoRVltL29UdFQ0MW9KUS9IenJrcjVBMUt3bkErRnlSVnFjRnZ0TjhRWEdET0FuZWRVUGNkemdxUlkzOUYyUjZXbHBzQWRMY3hEUTY4WmtnYkRsSkEvazBrVVY5d0NmSVVMaWp0WnNDNmFsZFNzMitWeHZDYTg2YmJwRGQzSisvOUJaYWNBaFdUd21LaWJpNk9veS9OT1N1VE5DV3RUNDIxdkY5NmZ4bWFVcWtLc1BlVkNRNlEvSG4ydER1T1ZkcXk4Um5BWU5kUU9UZnVOUE9BPQ%253D%253D&lwfilter=&wsrt=&wpn='


a = link_generator(wikiurl)
print(a)

如果我运行此代码，将打印内容添加到功能中，它将返回所有链接，为什么？我需要所有带有return

的链接

运行此代码：您将看到不同的内容：

import requests
import re

wikiurl = 'https://en.wikipedia.org/wiki/List_of_states_and_territories_of_the_United_States'


state_pat = re.compile(r'title=\"(\w+)\">')

def get_page_content(url):
    response = requests.get(url)
    return response.text

def link_generator(wikiurl):
    content = get_page_content(wikiurl)
    names = state_pat.findall(content)
    for i in names:
        print('https://www.local.com/business/results/listing.cfm?s=tile+and+grout+cleaning&ar=' + i + '%2CNY&gsp=ZFZWU1RaU09zWGNYdjFEV1l2ZHFLNVZUUFRPT3c3a21lbFVCbERQOU5VS3p6ai9DRXNMa29PcVZ0ZVV0TXZLM01wUVFUUHZYK2lrMnB5VGJyMHZJeUNoK1dXaUoxZ1NKT3AxbVlJOGN1aVBEb1NRMzlCemdDVHh5aGd3eU5DYUpKWDRtNFVQR0llOFJibUhQR3pSV3ppWFR4ekJoRVltL29UdFQ0MW9KUS9IenJrcjVBMUt3bkErRnlSVnFjRnZ0TjhRWEdET0FuZWRVUGNkemdxUlkzOUYyUjZXbHBzQWRMY3hEUTY4WmtnYkRsSkEvazBrVVY5d0NmSVVMaWp0WnNDNmFsZFNzMitWeHZDYTg2YmJwRGQzSisvOUJaYWNBaFdUd21LaWJpNk9veS9OT1N1VE5DV3RUNDIxdkY5NmZ4bWFVcWtLc1BlVkNRNlEvSG4ydER1T1ZkcXk4Um5BWU5kUU9UZnVOUE9BPQ%253D%253D&lwfilter=&wsrt=&wpn=')


a = link_generator(wikiurl)
print(a)

Answer 1

在函数中发出return语句时，它不会执行任何其他行，并返回到其调用方。如果要迭代地返回生成器中的项目，可以将return替换为yield。或者，将结果收集为列表，然后返回列表。

然后，当您调用以下命令时，您需要更改最后一行：

a = list(link_generator(wikiurl))

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1 个答案: