cjvalpy

Python bindings of cjval, the official validator for CityJSON files.

Installation

pip

To install the latest release: pip install cjvalpy

If you want to compile it yourself

1. install latest Rust
2. install maturin
3. maturin build --release
4. cd ./target/wheels/
5. pip install [name-wheel].whl will install it to your local Python

Development

1. install Rust (v1.39+)
2. install maturin
3. maturin develop
4. move to another folder, and import cjvalpy shouldn't return any error

Usage

Made to be used with cjio:

cjio myfile.city.json validate

but can be used directly in python:

import cjvalpy
import json
import urllib.request

f = open("~/data/noise.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())