Python json问题整理

TypeError: Object of type 'int64' is not JSON serializable

def convert(o):
    if isinstance(o, numpy.int64): return int(o)  
    raise TypeError

json.dumps({'value': numpy.int64(42)}, default=convert)

参考
https://stackoverflow.com/questions/11942364/typeerror-integer-is-not-json-serializable-when-serializing-json-in-python