from decimal import Decimal
########################################################################
class Fees(object):
""""""
#----------------------------------------------------------------------
def __init__(self):
"""Constructor"""
self._fee = None
#----------------------------------------------------------------------
def get_fee(self):
"""
Return the current fee
"""
return self._fee
#----------------------------------------------------------------------
def set_fee(self, value):
"""
Set the fee
"""
if isinstance(value, str):
self._fee = Decimal(value)
elif isinstance(value, Decimal):
self._fee = value
fee = property(get_fee, set_fee)
结果：
>>> f = Fees()
>>> f.set_fee("1")
>>> f.fee
Decimal('1')
>>> f.fee = "2"
>>> f.get_fee()
Decimal('2')
请问为什么f.fee能被访问？代码中都没有f.fee的声明啊，只有f._fee的声明，它们之间是什么约定关系？是哪里起了作用？查资料没查到。谢谢！
