Reads in lines, interprets them as json, then recursively replaces all dictionary values with '...' and all lists with [ '...' ]. The idea is that you can use this to get the "gist" of the json struct, so if you have a lot of json structs you're analyzing to find similarities this may help. (Works on py2 and py3)

json-gist.py

#!/usr/bin/env python          
                               
import sys
import json

def main():                    
    for line in sys.stdin:     
        struct = json.loads(line)       
        clean_struct(struct)   
        clean_line = json.dumps(struct,sort_keys=True)
        print(clean_line)      

def clean_struct(struct):      
    for key in struct:
        val = struct[key]      
        if isinstance(val,dict):        
            struct[key] = clean_struct(val) 
        elif isinstance(val,list):      
            struct[key] = [ '...' ]         
        else:
            struct[key] = '...'

    return struct
  
main()