介绍
python有json模块，直接import json即可使用。主要有四个方法:
dumps将python类型转换为json字符串
loads将json字符串转换成python类型
dump将存有python类型的文件直接转为json字符串
load将存有json格式的文件转为python类型
-s方法是直接进行数据类型转换，而-方法则是包含了文件操作，可以通过import json;help(json.XXX)获得相关帮助，部分帮助内容如下：
帮助文档
- dump(obj, fp, *, 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“ as a JSON formatted stream to “fp“ (a
“.write()“-supporting file-like object). - 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“. - load(fp, *, cls=None, object_hook=None, parse_float=None, parse_int=None, parse_constant=None, object_pairs_hook=None, **kw)
Deserialize “fp“ (a “.read()“-supporting file-like object containing
a JSON document) to a Python object. - loads(s, *, encoding=None, cls=None, object_hook=None, parse_float=None, parse_int=None, parse_constant=None, object_pairs_hook=None, **kw)
Deserialize “s“ (a “str“, “bytes“ or “bytearray“ instance
containing a JSON document) to a Python object.
python-json类型对应关系
python类型→json类型
dict→object
list, tuple→array
str, unicode→string
int, long, float→number
True,False→true,false
None→null