在字符串内部的列表中迭代字典

Question

我有一个字符串：-

    '[{
                  "@context": "http://database.org",
                  "mainEntityOfPage":"https://www.nyttimes.com/world/world_army.html",
                  "@type": "NewsArticle",
                  "text": "Now, eight months later, the $23,000 he invested in several digital tokens is worth about $4,000, 
and he is clearheaded about what happened.

    “I got too caught up in the fear of missing out and trying to make a quick buck,” he said last week. “The losses have pretty much left me financially ruined.”"}]'

为了在字符串中迭代字典。我首先尝试从字符串中删除引号：

string=eval(string)

它给了我错误

    "text": "Now, eight months later, the $23,000 he invested in several digital tokens is worth about $4,000, 
        and he is clearheaded about what happened.
                                                   ^
        SyntaxError: EOL while scanning string literal

具体是什么意思？

Answer 1

由于换行符，您可能会收到错误消息。

试试：

import re
import json
s = '''[{
                  "@context": "http://database.org",
                  "mainEntityOfPage":"https://www.nyttimes.com/world/world_army.html",
                  "@type": "NewsArticle",
                  "text": "Now, eight months later, the $23,000 he invested in several digital tokens is worth about $4,000, and he is clearheaded about what happened.

    “I got too caught up in the fear of missing out and trying to make a quick buck,” he said last week. “The losses have pretty much left me financially ruined.”"}]'''

print( json.loads(re.sub(r"\n", "", s)) )   #or  json.loads(s.replace('\n', ''))

输出：

[{u'@context': u'http://database.org',
  u'@type': u'NewsArticle',
  u'mainEntityOfPage': u'https://www.nyttimes.com/world/world_army.html',
  u'text': u'Now, eight months later, the $23,000 he invested in several digital tokens is worth about $4,000, and he is clearheaded about what happened.    \u201cI got too caught up in the fear of missing out and trying to make a quick buck,\u201d he said last week. \u201cThe losses have pretty much left me financially ruined.\u201d'}]

Answer 2

此处的字符串评估面向 EOL - 给定字符串中的行尾。下面的代码可能会解决您的问题。

string=string.rstrip()

Python String rstrip() rstrip() 方法返回删除了尾随字符的字符串副本（基于传递的字符串参数）。 rstrip() 根据参数（指定要删除的字符集的字符串）从右侧删除字符。

Answer 3

您面临的主要问题是换行。您需要先替换换行符，然后执行 eval。检查以下示例。

from pprint import pprint

b = '''[{
                  "@context": "http://database.org",
                  "mainEntityOfPage":"https://www.nyttimes.com/world/world_army.html",
                  "@type": "NewsArticle",
                  "text": "Now, eight months later, the $23,000 he invested in several digital tokens is worth about $4,000, 
and he is clearheaded about what happened.
    “I got too caught up in the fear of missing out and trying to make a quick buck,” he said last week. “The losses have pretty much left me financially ruined.”"}]'''
x= eval(b.replace('\n', ' '))
print(type(x))
pprint(x)

输出：

<class 'list'>
[{'@context': 'http://database.org',
  '@type': 'NewsArticle',
  'mainEntityOfPage': 'https://www.nyttimes.com/world/world_army.html',
  'text': 'Now, eight months later, the $23,000 he invested in several digital '
          'tokens is worth about $4,000,  and he is clearheaded about what '
          'happened.     “I got too caught up in the fear of missing out and '
          'trying to make a quick buck,” he said last week. “The losses have '
          'pretty much left me financially ruined.”'}]

正如 FHTMitchell 所说：

你不应该使用 eval 因为points mentioned here

没有 EVAL 的更新代码：

import json
from pprint import pprint

b = '''[{
                  "@context": "http://database.org",
                  "mainEntityOfPage":"https://www.nyttimes.com/world/world_army.html",
                  "@type": "NewsArticle",
                  "text": "Now, eight months later, the $23,000 he invested in several digital tokens is worth about $4,000, 
and he is clearheaded about what happened.
    “I got too caught up in the fear of missing out and trying to make a quick buck,” he said last week. “The losses have pretty much left me financially ruined.”"}]'''
x= json.loads(b.replace('\n', ' '))
print(type(x))
pprint(x)

输出：

<class 'list'>
[{'@context': 'http://database.org',
  '@type': 'NewsArticle',
  'mainEntityOfPage': 'https://www.nyttimes.com/world/world_army.html',
  'text': 'Now, eight months later, the $23,000 he invested in several digital '
          'tokens is worth about $4,000,  and he is clearheaded about what '
          'happened.     “I got too caught up in the fear of missing out and '
          'trying to make a quick buck,” he said last week. “The losses have '
          'pretty much left me financially ruined.”'}]