Python中将（字典，列表等）变量格式化成字符串输出

比如原始的List变量的值是这种：

 [{"yearMonth": {"month": {"string": "November", "value": ""}, "year": {"string": "", "value": ""}}, "reservedMonthList": ["", "", "", "", "", "", "", "", "", "", "", "", "", "", ""]}, {"yearMonth": {"month": {"string": "December", "value": ""}, "year": {"string": "", "value": ""}}, "reservedMonthList": ["", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", ""]}]

而想要将其输出为带缩进的，树状的，很漂亮的效果，那么可以通过这样的方法：

 import json

 #demoDictList is the value we want format to output
 jsonDumpsIndentStr = json.dumps(demoDictList, indent=1)
 print "jsonDumpsIndentStr=",jsonDumpsIndentStr

输出：

 [
  {
   "yearMonth": {
    "month": {
     "string": "November",
     "value": ""
    },
    "year": {
     "string": "",
     "value": ""
    }
   },
   "reservedMonthList": [
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    ""
   ]
  },
  {
   "yearMonth": {
    "month": {
     "string": "December",
     "value": ""
    },
    "year": {
     "string": "",
     "value": ""
    }
   },
   "reservedMonthList": [
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    ""
   ]
  }
 ]

传递给json.dumps时，没有添加indent=1的话：

 import json

 #demoDictList is the value we want format to output
 jsonDumpsIndentStr = json.dumps(demoDictList)
 print "jsonDumpsIndentStr=",jsonDumpsIndentStr

则就是输出的，前面已经给出的，紧凑型的，没有缩进和换行的，原始的JSON字符串了：

 [{"yearMonth": {"month": {"string": "November", "value": ""}, "year": {"string": "", "value": ""}}, "reservedMonthList": ["", "", "", "", "", "", "", "", "", "", "", "", "", "", ""]}, {"yearMonth": {"month": {"string": "December", "value": ""}, "year": {"string": "", "value": ""}}, "reservedMonthList": ["", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", ""]}]