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inheritance_examples.py
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inheritance_examples.py
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#!/usr/bin/env python
import abc
class GetSetParent(object):
__metaclass__ = abc.ABCMeta
def __init__(self, value):
self.val = 0
def set_val(self, value):
self.val = value
def get_val(self):
return self.val
@abc.abstractmethod
def showdoc(self):
return
class GetSetInt(GetSetParent):
def set_val(self, value):
if not isinstance(value, int):
value = 0
super(GetSetInt, self).set_val(value)
def show(self):
print('GetSetInt object ({0}), only acceptis '
'integer values'.format(id(self)))
class GetSetList(GetSetParent):
def __init__(self, value=0):
self.vallist = [value]
def get_val(self):
return self.vallist[-1]
def get_vals(self):
return self.vallist
def set_val(self, value):
self.vallist.append(value)
def showdoc(self):
print('GetSetList object, len {0} '
'history of values set'.format(len(self.vallist)))
x = GetSetInt(3)
x.set_val(5)
print(x.get_val())
x.showdoc()
gsl = GetSetList(5)
gsl.set_val(10)
gsl.set_val(20)
print(gsl.get_val())
print(gsl.get_vals())
gsl.showdoc()