pip install cjvalpy cjio
!curl -LC - https://www.cityjson.org/tutorials/files/twobuildings.city.json -o two_buildings.city.json

Parsing two_buildings.city.json
Validation (with official CityJSON schemas)
Error: 'CJValidator' object has no attribute 'get_report'

import cjvalpy
import json
import urllib.request

f = open("two_buildings.city.json")
fj = json.loads(f.read())
js = []
js.append(json.dumps(fj))
print("Downloading the Extension JSON schema file(s):")
if "extensions" in fj:
    for ext in fj["extensions"]:
        theurl = fj["extensions"][ext]["url"]
        try:
            with urllib.request.urlopen(fj["extensions"][ext]["url"]) as f:
                sf = f.read().decode('utf-8')
                js.append(sf)
        except:
            s = "'%s' cannot be downloaded\nAbort" % fj["extensions"][ext]["url"]
            raise Exception(s)
val = cjvalpy.CJValidator(js)
val.validate()
re = val.get_report()
print(val.get_report())

AttributeError                            Traceback (most recent call last)
[<ipython-input-24-a3532499301e>](https://localhost:8080/#) in <cell line: 22>()
     20 val = cjvalpy.CJValidator(js)
     21 val.validate()
---> 22 re = val.get_report()
     23 print(val.get_report())

AttributeError: 'CJValidator' object has no attribute 'get_report'