expect

Python validate tool for json. Raise AssertionError if target is invalid.

Installation

$ pip install py-expect

Docs

Expect

ExpectDict(item={}, strict=False, noneable=False)

# valid value as dict, and has a key "name"
ExpectDict({"name": str}).validate(value)

Validate value with item. item should be a dict and it's sub item value could be an instance of Expect or type or normal value

If strict is True, value keys must equal the same with item keys.
If noneable is True, value can be None.

ExpectList(item=None, min_length=None, max_length=None, noneable=False)

#Validate `value` as `int` list. 
ExpectList(item=int).validate(value)

Validate value as int list.

value value must be a list. min_length min length of value max_length max length of value If noneable is True, value could be None

ExpectStr

ExpectNumber

ExpectInt

ExpectFloat

ExpectBool

ExpectNone

ExpectInstance

Example

from py_expect import ExpectDict


expect = ExpectDict({
    "name": str,
    "age": int,
})

# valid example
result = {
    "name": "mrhack"
    "age": 20
}
expect.validate(result)
print "result is valid"


# invalid example
result2 = {
    "name": "mrhack"
    "age": "20"
}
try:
    expect.validate(result)
except Exception as e:
    print "result2 is invalid"

Tests

To run test cases:

 python test.py