如何在字典值中使用正则表达式从字符串中提取特定的子字符串

Question

我在下面有一个str‘data’包含一些url内容。使用regex，我只想提取"；url"："https://www.google.com"。以下是我迄今为止尝试的内容：

impor re
url = re.findall('"url":.*', data)

如有任何帮助，我们将不胜感激。

{"__ref"："QXNzZXRDb250cmFjdFR5cGU6NDUOTE3"}；小数"：null；relayId"："QXNzZXRUeXBlOjE1MDQ5OTUxMQ＝＝"收藏夹计数"：10；isDelisted"：false；isFavorite"：false；isFrozen"：false；hasUnlockableContent"：false；tokenId"："3379〃"集合"：{"__ref"："Q29sbGVjdGlvblR5cGU6MzY3NDA5MQ＝＝"}；orderData"：{"__ref"："client：QXNzZXRUeXBlOjE1MDQ5OTUxMQ=：orderData"}，"；name"："Flame River Chumbi"authenticityMetadata"：null；imageUrl"："https:\u002F\u002Flh3.googleusercontent.com\u002FtM1wwmVb1dA5DadG-QXFBd1nWqi6DRh7fL0nHgjr2eZkSMKIhcPcwSuBLEvRIgOQRuFDKiovy1kpHSGz4NCiKw6oSON-_gdz8aXKw"创建者"：null；资产所有者(第一：1("：{"__ref"："client：QXNzZXRUeXBlOjE1MDQ5OTUxMQ=：assetOwners(first:1("}，"；animationUrl"：null；backgroundColor"：null；描述"："丘姆比是可爱的两足动物，栖息在郁郁葱葱、神秘的森林山谷中。他们与森林有着精神上的联系，并使用魔法来维护和保护森林"isListable"：真，"；isReportedSuspective"：false；性状(第一个：100("：{"__ref"："client：QXNzZXRUeXBlOjE1MDQ5OTUxMQ=：traits(first:100("}；displayImageUrl"："https:\u002F\u002Flh3.googleusercontent.com\u002FtM1wwmVb1dA5DadG-QXFBd1nWqi6DRh7fL0nHgjr2eZkSMKIhcPcwSuBLEvRIgOQRuFDKiovy1kpHSGz4NCiKw6oSON-_gdz8aXKw"externalLink"：null；isEditableByOwner"：{"__ref"："客户端：QXNzZXRUeXBlOjE1MDQ5OTUxMQ=：isEditableByOwner"}，"；url"："https://google.com"&quot__ref"："客户端：QXNzZXRUeXBlOjE1MDQ5OTUxMQ＝＝：性状(第一个：100("displayImageUrl"："https:\u002F\u002Flh3.googleusercontent.com\u002FtM1wwmVb1dA5DadG-QXFBd1nWqi6DRh7fL0nHgjr2eZkSMKIhcPcwSuBLEvRIgOQRuFDKiovy1kpHSGz4NCiKw6oSON-_gdz8aXKw"externalLink"：null；isEditableByOwner"：{"__ref"："客户端：QXNzZXRUeXBlOjE1MDQ5OTUxMQ=：isEditableByOwner"}

Answer 1

您想要知道的是非贪婪搜索。尝试以下正则表达式：

import re
s = '{"__ref":"QXNzZXRDb250cmFjdFR5cGU6NDU0OTE3"},"decimals":null,"relayId":"QXNzZXRUeXBlOjE1MDQ5OTUxMQ==","favoritesCount":10,"isDelisted":false,"isFavorite":false,"isFrozen":false,"hasUnlockableContent":false,"tokenId":"3379","collection":{"__ref":"Q29sbGVjdGlvblR5cGU6MzY3NDA5MQ=="},"orderData":{"__ref":"client:QXNzZXRUeXBlOjE1MDQ5OTUxMQ==:orderData"},"name":"Flame River Chumbi","authenticityMetadata":null,"imageUrl":"https:u002Fu002Flh3.googleusercontent.comu002FtM1wwmVb1dA5DadG-QXFBd1nWnqi6DRh7fL0nHgjr2eZkSMKIhcPcwSuBLEvRIgOQRuFDKiovy1kpHSGz4NciKw6oSON-_gdz8aXKw","creator":null,"assetOwners(first:1)":{"__ref":"client:QXNzZXRUeXBlOjE1MDQ5OTUxMQ==:assetOwners(first:1)"},"animationUrl":null,"backgroundColor":null,"description":"Chumbi are adorable bipedal creatures that inhabit a lush and mysterious forest valley. They have a spiritual connection to the forest and use magical spells to maintain and protect it.","isListable":true,"isReportedSuspicious":false,"traits(first:100)":{"__ref":"client:QXNzZXRUeXBlOjE1MDQ5OTUxMQ==:traits(first:100)"},"displayImageUrl":"https:u002Fu002Flh3.googleusercontent.comu002FtM1wwmVb1dA5DadG-QXFBd1nWnqi6DRh7fL0nHgjr2eZkSMKIhcPcwSuBLEvRIgOQRuFDKiovy1kpHSGz4NciKw6oSON-_gdz8aXKw","externalLink":null,"isEditableByOwner":{"__ref":"client:QXNzZXRUeXBlOjE1MDQ5OTUxMQ==:isEditableByOwner"}, "url":"https:://google.com" ,"__ref":"client:QXNzZXRUeXBlOjE1MDQ5OTUxMQ==:traits(first:100)","displayImageUrl":"https:u002Fu002Flh3.googleusercontent.comu002FtM1wwmVb1dA5DadG-QXFBd1nWnqi6DRh7fL0nHgjr2eZkSMKIhcPcwSuBLEvRIgOQRuFDKiovy1kpHSGz4NciKw6oSON-_gdz8aXKw","externalLink":null,"isEditableByOwner":{"__ref":"client:QXNzZXRUeXBlOjE1MDQ5OTUxMQ==:isEditableByOwner"}'
results = re.findall(r'"url":".*?"', s)

---

对OP意见的回答：

您可以使用分组。

import re
s = '{"__ref":"QXNzZXRDb250cmFjdFR5cGU6NDU0OTE3"},"decimals":null,"relayId":"QXNzZXRUeXBlOjE1MDQ5OTUxMQ==","favoritesCount":10,"isDelisted":false,"isFavorite":false,"isFrozen":false,"hasUnlockableContent":false,"tokenId":"3379","collection":{"__ref":"Q29sbGVjdGlvblR5cGU6MzY3NDA5MQ=="},"orderData":{"__ref":"client:QXNzZXRUeXBlOjE1MDQ5OTUxMQ==:orderData"},"name":"Flame River Chumbi","authenticityMetadata":null,"imageUrl":"https:u002Fu002Flh3.googleusercontent.comu002FtM1wwmVb1dA5DadG-QXFBd1nWnqi6DRh7fL0nHgjr2eZkSMKIhcPcwSuBLEvRIgOQRuFDKiovy1kpHSGz4NciKw6oSON-_gdz8aXKw","creator":null,"assetOwners(first:1)":{"__ref":"client:QXNzZXRUeXBlOjE1MDQ5OTUxMQ==:assetOwners(first:1)"},"animationUrl":null,"backgroundColor":null,"description":"Chumbi are adorable bipedal creatures that inhabit a lush and mysterious forest valley. They have a spiritual connection to the forest and use magical spells to maintain and protect it.","isListable":true,"isReportedSuspicious":false,"traits(first:100)":{"__ref":"client:QXNzZXRUeXBlOjE1MDQ5OTUxMQ==:traits(first:100)"},"displayImageUrl":"https:u002Fu002Flh3.googleusercontent.comu002FtM1wwmVb1dA5DadG-QXFBd1nWnqi6DRh7fL0nHgjr2eZkSMKIhcPcwSuBLEvRIgOQRuFDKiovy1kpHSGz4NciKw6oSON-_gdz8aXKw","externalLink":null,"isEditableByOwner":{"__ref":"client:QXNzZXRUeXBlOjE1MDQ5OTUxMQ==:isEditableByOwner"}, "url":"https:://google.com" ,"__ref":"client:QXNzZXRUeXBlOjE1MDQ5OTUxMQ==:traits(first:100)","displayImageUrl":"https:u002Fu002Flh3.googleusercontent.comu002FtM1wwmVb1dA5DadG-QXFBd1nWnqi6DRh7fL0nHgjr2eZkSMKIhcPcwSuBLEvRIgOQRuFDKiovy1kpHSGz4NciKw6oSON-_gdz8aXKw","externalLink":null,"isEditableByOwner":{"__ref":"client:QXNzZXRUeXBlOjE1MDQ5OTUxMQ==:isEditableByOwner"}'
results = re.findall(r'"url":"(.*?)"', s)

Answer 2

为这个任务的孩子使用regex真的不合适。。。CCD_ 1似乎是一个JSON"；编码的"；一串在python中，您可以将其转换为dict并提取其值：

import json
encodedData = '{"ref":{"__ref":"QXNzZXRDb250cmFjdFR5cGU6NDU0OTE3"},"decimals":null,"relayId":"QXNzZXRUeXBlOjE1MDQ5OTUxMQ==","favoritesCount":10,"isDelisted":false,"isFavorite":false,"isFrozen":false,"hasUnlockableContent":false,"tokenId":"3379","collection":{"__ref":"Q29sbGVjdGlvblR5cGU6MzY3NDA5MQ=="},"orderData":{"__ref":"client:QXNzZXRUeXBlOjE1MDQ5OTUxMQ==:orderData"},"name":"Flame River Chumbi","authenticityMetadata":null,"imageUrl":"https:u002Fu002Flh3.googleusercontent.comu002FtM1wwmVb1dA5DadG-QXFBd1nWnqi6DRh7fL0nHgjr2eZkSMKIhcPcwSuBLEvRIgOQRuFDKiovy1kpHSGz4NciKw6oSON-_gdz8aXKw","creator":null,"assetOwners(first:1)":{"__ref":"client:QXNzZXRUeXBlOjE1MDQ5OTUxMQ==:assetOwners(first:1)"},"animationUrl":null,"backgroundColor":null,"description":"Chumbi are adorable bipedal creatures that inhabit a lush and mysterious forest valley. They have a spiritual connection to the forest and use magical spells to maintain and protect it.","isListable":true,"isReportedSuspicious":false,"traits(first:100)":{"__ref":"client:QXNzZXRUeXBlOjE1MDQ5OTUxMQ==:traits(first:100)"},"displayImageUrl":"https:u002Fu002Flh3.googleusercontent.comu002FtM1wwmVb1dA5DadG-QXFBd1nWnqi6DRh7fL0nHgjr2eZkSMKIhcPcwSuBLEvRIgOQRuFDKiovy1kpHSGz4NciKw6oSON-_gdz8aXKw","externalLink":null,"isEditableByOwner":{"__ref":"client:QXNzZXRUeXBlOjE1MDQ5OTUxMQ==:isEditableByOwner"},"url":"https:://google.com","__ref":"client:QXNzZXRUeXBlOjE1MDQ5OTUxMQ==:traits(first:100)","displayImageUrl":"https:u002Fu002Flh3.googleusercontent.comu002FtM1wwmVb1dA5DadG-QXFBd1nWnqi6DRh7fL0nHgjr2eZkSMKIhcPcwSuBLEvRIgOQRuFDKiovy1kpHSGz4NciKw6oSON-_gdz8aXKw","externalLink":null,"isEditableByOwner":{"__ref":"client:QXNzZXRUeXBlOjE1MDQ5OTUxMQ==:isEditableByOwner"}}'
data = json.loads(encodedData)
url = data['url']
print(url) # https:://google.com

注意：粘贴的data似乎缺少json的某些部分。我在开头添加了{"ref":，在结尾添加了}。