一尘不染

解析一行中的多个json对象

json

我正在解析包含json对象的文件。问题是某些文件在一行中有多个对象。例如:

{"data1": {"data1_inside": "bla{bl\"a"}}{"data1": {"data1_inside": "blabla["}}{"data1": {"data1_inside": "bla{bla"}}{"data1": {"data1_inside": "bla["}}

我做了一个函数,尝试在没有左括号的情况下解析子字符串,但是值中可能有大括号。我尝试过通过检查引号的开头和结尾来跳过值,但是也有带有转义引号的值。有关如何处理此问题的任何想法?

我的尝试:

def get_lines(data):
    lines = []
    open_brackets = 0
    start = 0
    is_comment = False
    for index, c in enumerate(data):
        if c == '"':
            is_comment = not is_comment
        elif not is_comment:
            if c == '{':
                if not open_brackets:
                    start = index
                open_brackets += 1

            if c == '}':
                open_brackets -= 1
                if not open_brackets:
                    lines.append(data[start: index+1])

    return lines

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2020-07-27

共1个答案

一尘不染

简单但不够健壮的版本:

>>> import re
>>> s = r'{"data1": {"data1_inside": "bla{bl\"a"}}{"data1": {"data1_inside": "blabla["}}{"data1": {"data1_inside": "bla{bla"}}{"data1": {"data1_inside": "bla["}}'
>>> r = re.split('(\{.*?\})(?= *\{)', s)
['', '{"data1": {"data1_inside": "bla{bl\\"a"}}', '', '{"data1": {"data1_inside": "blabla["}}', '', '{"data1": {"data1_inside": "bla{bla"}}', '{"data1": {"data1_inside": "bla["}}']

如果}{包含在字符串中,则将失败

正如其他建议一样,您然后可以尝试解析每个元素。如果无效,则应与下一个元素一起检查此元素。

请注意,这r是上面代码的结果

accumulator = ''
res = []
for subs in r:
    accumulator += subs
    try:
        res.append(json.loads(accumulator))
        accumulator = ''
    except:
        pass
2020-07-27