Python在JSON中查找包含在单词/字符串中的单引号

Question

我正在将 json 数据解析为 python 中的 SQL 查询，并且需要注意用双引号替换单引号，因为我得到的数据的符号是错误的（我无法更改） .我遇到的问题是，一些字符串是英文文本并包含单引号。

'comment': 'bla bla it's you're can't bla bla',

我如何只替换书面文本中的那些而不是定义属性的那些？正则表达式会是什么样子？

Answer 1

虽然我同意您的问题的所有 cmets，但作为练习，我试图从您拥有的内容中获取有效的 json 字符串。似乎可以通过涉及字符串操作的几个步骤来完成：

bad = "'comment': 'bla not, really, a comment: bla it's you're can't bla bla'," 
# note that bad has colons, commas and single quotes/apostrophes in it

one = bad.replace("': '",'": "') #separate the key from the value
two = one.replace("'",'"',1) #replace the single quote on the left side of the key with a double quote

#the following lines were lifted from https://stackoverflow.com/a/54945804/9448090
#replace the single quote on the right side of the value with a double quote; drop the last comma:

removal = "'"
reverse_removal = removal[::-1]
replacement = '"'
reverse_replacement = replacement[::-1]

three = two[::-1].replace(reverse_removal, reverse_replacement, 1)[::-1].replace('",','"')
good = "{"+three+"}" #final formatting for json
json.loads(good)

输出：

{'comment': "bla not, really, a comment: bla it's you're can't bla bla"}

Answer 2

假设您假设字符串中没有逗号和/或冒号，您可以通过将: 和, 之间的所有内容作为字符串来恢复。例如，这可以通过使用正则表达式拆分来实现。

In [1]: s = "'comment1': 'bla bla it's you're can't bla bla','comment2': 'bla bla it's you're can't bla bla',"

In [2]: r = re.compile(r"[:,]")

In [3]: r.split(s)
Out[3]:
["'comment1'",
 " 'bla bla it's you're can't bla bla'",
 "'comment2'",
 " 'bla bla it's you're can't bla bla'",
 '']

当然，这是一个很大的“如果”。如果您的字符串甚至有可能包含逗号/冒号字符，那么deceze 是正确的并且您是 SOL。

一般来说，这个问题没有解决办法。要了解这一点，请考虑以下（有些人为的）示例。

 ... 'comment': 'this is', 'my comments': 'Hi', 

如果允许包裹在 ' 中的字符串包含 ' ，则无法判断这是 'comment': "this is', 'my comments': 'Hi'", 还是 'comment': "this is", 'my comments': "Hi", ...