does jsonschema support verifying optional field in json?

[naijim]

I am trying to figure out whether jsonschema supporting verifying optional field in json or not. I tried the following code:

from jsonschema import validate

# your code here
schema = {
    "type" : "object",
    "properties" : {
        "price" : {"type" : "number", "required": false},
        "name" : {"type" : "string"},
    },
}

validate({"name" : "Eggs", "price" : 123.123}, schema)

I have this error:

---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
<ipython-input-6-6a64e78dd26e> in <module>
      5     "type" : "object",
      6     "properties" : {
----> 7         "price" : {"type" : "number", "required": false},
      8         "name" : {"type" : "string"},
      9     },

NameError: name 'false' is not defined

So this feature isn't supported yet?
I found related question here

[naijim]

I have found some clues. issue closed