英文:
How to calcutate several functions in class without reiteration
问题
需要计算一些变量，这些变量可以被其他变量使用：
class Variables:
def __init__(self, param1, param2):
self._param1 = param1
self._param2 = param2
def var1(self):
return self._param1 + 'foo'
def var2(self):
return var1() + 'bar'
....
def var9(self):
return var2() + var8()
def var10(self):
return var3() + var9()
问题是，在模块外部调用它们时，中间函数var1..var9多次计算。我尝试在__init__中计算它们：
def var1(self):
return self._param1 + 'foo'
def var2(self):
return self._var1 + 'bar'
....
def var9(self):
return self._var2 + self._var8
def var10(self):
return self._var3 + self._var9
class Variables:
def __init__(self, param1, param2):
self._param1 = param1
self._param2 = param2
self._var1 = var1(self)
self._var2 = var2(self)
....
self._var9 = var9(self)
self._var10 = var10(self)
但是我的直觉告诉我，这个决定很糟糕：类内外的self是“不同的”。出于某些原因，我需要10个单独的函数，不能将它们合并为一个大函数。最佳方法是如何计算和存储它们？
英文:
I need to calculate some variables, which can be used by other variables:
class Variables:
def __init__(self, param1, param2):
self._param1 = param1
self._param2 = param2
def var1(self):
return self._param1 + 'foo'
def var2(self):
return var1() + 'bar'
....
def var9(self):
return var2() + var8()
def var10(self):
return var3() + var9()
Problem is that intermediate functions var1..var9 are calculating multiple times when I call them outside module. I tried to calculate them in __init__:
def var1(self):
return self._param1 + 'foo'
def var2(self):
return self._var1 + 'bar'
....
def var9(self):
return self._var2 + self._var8
def var10(self):
return self._var3 + self._var9
class Variables:
def __init__(self, param1, param2):
self._param1 = param1
self._param2 = param2
self._var1 = var1(self)
self._var2 = var2(self)
....
self._var9 = var9(self)
self._var10 = var10(self)
But my intuition tells me that this decision is terrible: self-s inside and outside class are "different".
For some reasons I need 10 separate functions and cant combine them in one big function. What is the best way to calculate and store them?
答案1
得分: 1
class Variables:
def __init__(self, param1, param2):
self._param1 = param1
self._param2 = param2
self._var1 = self._generate_var1()
... 类似地处理 var2 到 var10
def _generate_var1(self):
var1 = self._param1 + 'foo'
return var1
def var1(self):
return self._var1
... 类似地处理 var2 到 var10
英文:
class Variables:
def __init__(self, param1, param2):
self._param1 = param1
self._param2 = param2
self._var1 = self._generate_var1()
... similarly for var2 through var10
def _generate_var1(self):
var1 = self._param1 + 'foo'
return var1
def var1(self):
return self._var1
... similarly for var2 through var10
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