NameError:name(method) is not defined!!!

Question

Hallo everyone,
Can somebody tell me why I am getting this error"NameError:name(get_initialen() is not defined!!!"? I am trying to retrieve a methode in the another methode, but it doesn't work.
Code:
def get_employee_id(self):
a=""+get_initialen()
print("My name ",self.name,self.surname,"(alias",a,")")
def get_initialen(self):
v=self.vorname[0:1]
n=self.nachname[0:1]
alias=""+v+"."+n
return alias

Answer 1

define get_employee_id() after get_initialen()