validate.py

def validate(schema):
	def validator(validatee):
		for x in schema:
			isValid = schema[x]
			if type(validatee[x]) == isValid: continue
			elif type(isValid) != type and hasattr(isValid, '__call__'):
				if isValid(validatee[x]): continue
			return False
		return True
	return validator

# Example:

>>> isValid = validate({ 'foo': str, 'bar': int})
>>> isValid({ 'foo': '', 'bar': 3})
True
>>> isValid({ 'foo': '', 'bar': '3'})
False
>>> isAlsoValid = validate({ 'a': isValid, 'b': str })
>>> isAlsoValid({ 'a': { 'foo': 'a string', 'bar': '3'}, 'b': 'another string' })
False
>>> isAlsoValid({ 'a': { 'foo': 'a string', 'bar': 3}, 'b': 'another string' })
True