script I wrote to remove blank nodes from pg json-ld files

pgdeblanker.py

import yaml
import json

def unblank_node(node, bnodes):
    if isinstance(node,dict):
        if "@id" in node and node["@id"].startswith("_"):
            if len(node)==1:
                return bnodes[node["@id"]]
            else:
                return None
        else:
            newdict = {}
            for key in node.keys():
                newdict[key]= unblank_node(node[key], bnodes)
            return newdict
    elif isinstance(node,list):
        newlist=[]
        for item in node:
            newnode= unblank_node(item, bnodes)
            if newnode:
                newlist.append(newnode)
        return newlist
    else:
        return node

ld = json.loads(open("/Users/eric/github/local/metadata/pg20728.json","r").read())
graph = ld['@graph']
nodes = {}
for obj in graph:
    if isinstance(obj,dict):
        obj = obj.copy()
        if "@id" in obj and obj["@id"].startswith("_"):
            nodeid = obj["@id"]
            node = nodes.get(nodeid,{})
            del obj["@id"]
            node.update(obj)
            nodes[nodeid] = node
ld['@graph'] = unblank_node(graph,nodes)
    
#print test
#print yaml.safe_dump(test,default_flow_style=False)
open("/Users/eric/github/local/metadata/pg20728.ub.yaml","w+").write(yaml.safe_dump(ld,default_flow_style=False))
open("/Users/eric/github/local/metadata/pg20728.ub.json","w+").write(json.dumps(ld,indent=2, separators=(',', ': '), sort_keys=True))
print "done"