_getOrigHashValue evaluation of an hash attribute that has zero as its value

[chengdai-qz]

In the case where a field used in variant assignment has a value of zero, the function _getOrigHashValue will return an empty string and claim that the hashAttribute value is empty, even though that an attribute field with value 0 might have real meaning (i.e. the first user). That is,

self._attributes = {"id": 0}

_getOrigHashValue("id") would output ""

This is because _getOrigHashValue evaluates 0 or "" as false or false since they both are "falsy values", and as a result, it will return the last element of the comparison.

growthbook-python/growthbook.py

Lines 892 to 898 in d55de08

	def _getOrigHashValue(self, attr: str = None):
	attr = attr or "id"
	if attr in self._attributes:
	return self._attributes[attr] or ""
	if attr in self._user:
	return self._user[attr] or ""
	return ""

While a relative edge case, it might be worth updating _getOrigHashValue to handle a 0 value.