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Python json格式化打印實(shí)現(xiàn)過程解析

瀏覽:4日期:2022-07-16 17:31:31

編寫python腳本,調(diào)試的時(shí)候需要打印json格式報(bào)文,直接打印看不出層次,可以使用json.dumps格式化打印

import jsonimport requestsdef test_json(): r=requests.get(’https://home.testing-studio.com/categories.json’) print(r.json()) print(json.dumps(r.json(), indent=2,ensure_ascii=False)) # r.json()是json對象,indent表示縮進(jìn),ensure_ascii設(shè)置編碼格式化打印前:

格式化打印前:

Python json格式化打印實(shí)現(xiàn)過程解析

格式化打印后:

Python json格式化打印實(shí)現(xiàn)過程解析

json.dumps方法源碼:

def dumps(obj, *, skipkeys=False, ensure_ascii=True, check_circular=True, allow_nan=True, cls=None, indent=None, separators=None, default=None, sort_keys=False, **kw): '''Serialize ``obj`` to a JSON formatted ``str``. If ``skipkeys`` is true then ``dict`` keys that are not basic types (``str``, ``int``, ``float``, ``bool``, ``None``) will be skipped instead of raising a ``TypeError``. If ``ensure_ascii`` is false, then the return value can contain non-ASCII characters if they appear in strings contained in ``obj``. Otherwise, all such characters are escaped in JSON strings. If ``check_circular`` is false, then the circular reference check for container types will be skipped and a circular reference will result in an ``OverflowError`` (or worse). If ``allow_nan`` is false, then it will be a ``ValueError`` to serialize out of range ``float`` values (``nan``, ``inf``, ``-inf``) in strict compliance of the JSON specification, instead of using the JavaScript equivalents (``NaN``, ``Infinity``, ``-Infinity``). If ``indent`` is a non-negative integer, then JSON array elements and object members will be pretty-printed with that indent level. An indent level of 0 will only insert newlines. ``None`` is the most compact representation. If specified, ``separators`` should be an ``(item_separator, key_separator)`` tuple. The default is ``(’, ’, ’: ’)`` if *indent* is ``None`` and ``(’,’, ’: ’)`` otherwise. To get the most compact JSON representation, you should specify ``(’,’, ’:’)`` to eliminate whitespace. ``default(obj)`` is a function that should return a serializable version of obj or raise TypeError. The default simply raises TypeError. If *sort_keys* is true (default: ``False``), then the output of dictionaries will be sorted by key. To use a custom ``JSONEncoder`` subclass (e.g. one that overrides the ``.default()`` method to serialize additional types), specify it with the ``cls`` kwarg; otherwise ``JSONEncoder`` is used. ''' # cached encoder if (not skipkeys and ensure_ascii and check_circular and allow_nan and cls is None and indent is None and separators is None and default is None and not sort_keys and not kw): return _default_encoder.encode(obj) if cls is None: cls = JSONEncoder return cls( skipkeys=skipkeys, ensure_ascii=ensure_ascii, check_circular=check_circular, allow_nan=allow_nan, indent=indent, separators=separators, default=default, sort_keys=sort_keys, **kw).encode(obj)

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標(biāo)簽: Python 編程
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