Strange behavior of return in doctype validate

Dear all,

I make a custom apps and it’s quite strange behavior of Python like below code. When the condition is meet in def validate and go to return & exit the function, it still run do_other_things(). I insert some code write log to see what is happened and my assumption not wrong. So how can I exit the validate immediately?

class RetailDepositRegistration(Document):

def query(self, sql):
	db = Database('nifi',db_url='http://clickhouse:8123',readonly=True)

def validate(self):

	if self.idxacno:
		if self.skip_verifying:
			if (self.skip_verifying == 1 or "HR Manager" in frappe.get_roles(frappe.session.user)) :