如何使用最符合Python风格的方式解决以下问题?从交互式shell中开始:
>>> def f(a=False):
... if a:
... return 'a was True'
... return 'a was False'
...
>>> f(a=True)
'a was True'
>>> kw = 'a'
>>> val = True
>>> f(kw=val)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: f() got an unexpected keyword argument 'kw'
目前我正在使用以下方法解决它:
>>> exec 'result = f(%s=val)' % kw
>>> result
'a was True'
但它看起来相当笨拙...
(Python 2.7+或3.2+的解决方案都可以)