考虑到我将要分配和取消分配多个值,我该如何使代码更紧凑
class A:
def __init__(self,*args,**kwargs):
self._a = 0
self._b =0
def set_a(self):
self._a = 1
def set_b(self):
self._b = 1
def unset_a(self):
self._a =0
def unset_b(self):
self._b = 0
x=A()
x.set_a()
print(x._a) # 1
x.unset_a()
print(x._a) # 0
我只想避免编写多个set和unset函数,只需编写一个简单的1函数,即我传递类型(set / unset)以及要定位的变量即可
答案 0 :(得分:1)
我很想使用字典而不是多个变量来执行以下操作:
class A:
def __init__(self,*args,**kwargs):
self._d = {'_a': 0, '_b': 0}
def set_d_item(self, key, val):
self._d[key] = val
x=A()
x.set_d_item('_a', 1)
print(x._d['_a']) # 1
x.set_d_item('_a', 0)
print(x._d['_a']) # 0
如果您确实需要示例中的属性,则可以使用exec()
,但我不建议您执行任意代码:
class A:
def __init__(self,*args,**kwargs):
self._a = 0
self._b =0
def set_item(self, key, val):
exec(f'self.{key} = {val}')
x=A()
x.set_item('_a', 1)
print(x._a) # 1
x.set_item('_a', 0)
print(x._a) # 0
答案 1 :(得分:1)
您可以使用基于预定义配置的setattr使其更紧凑
class A:
_a = 0
_b = 0
var_config = {
'_a': {'unset': 0, 'set': 1},
'_b': {'unset': 0, 'set': 1},
}
def set_var(self, var, action='set'):
setattr(self, var, self.var_config[var][action])
>>> x = A()
>>> print(x._a)
0
>>> x.set_var('_a')
>>> print(x._a)
1
>>> x.set_var('_a', action='unset')
>>> print(x._a)
0