#!/usr/bin/env python3
class Person( object ) :
def __init__ ( self , first_name, last_name) :
self .first_name = first_name
self .last_name = last_name
def dele( self ) :
del self .last_name
def pr( self ) :
if self .last_name :
print ( self .last_name )
else :
print ( 'var has been deleted' )
p = Person( 'qqq' , 'www' )
p.dele ( )
p.pr ( )
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