[英]How to pass kwargs to another kwargs in python?
def a(**akwargs):
def b(bkwargs=akwargs):
# how to not only use akwargs defaultly,but also define bkwargs by
# myself?
print bkwargs
return b
如果我想实现以下功能。 我该如何处理上面的代码?
>>>a(u='test')()
{'u': test}
>>>a(u='test')(u='test2')
{'u': test2}
尚不清楚您要什么,但我认为这是窍门:
def a(**akwargs):
def b(bkwargs=akwargs, **kwargs):
# how to not only use akwargs defaultly,but also define bkwargs by
# myself?
if not bkwargs:
bkwargs = kwargs
else:
# it depends what you want here (merge or replace?), but probably
# something like bkwargs.update(kwargs) or kwargs.update(bkwargs)
return b
默认使用外部函数的kwarg,并更新传递给内部函数的kwarg。
from functools import partial
def outer(**kwargs):
def inner(**kwargs):
return(kwargs)
return partial(inner, **kwargs)
如果没有将kwargs分配给内部函数,那么下一个将使用来自外部函数的kwargs。
def outer(**outer_kwargs):
def inner(**inner_kwargs):
kwargs = inner_kwargs or outer_kwargs
return kwargs
return inner
为什么不执行以下操作?
def a(**akwargs):
def b(**bkwargs):
allkwargs = {}
allkwargs.update(akwargs)
allkwargs.update(bkwargs)
print allkwargs
return b
这将使用值从a
但允许您通过传递更多的覆盖它b
。 所以:
>>> a(u='test')()
{'u': 'test'}
>>> a(u='test')(u='test2')
{'u': 'test2'}
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