[英]Passing a function argument through another function in Python
When giving a string-parameter to a function which i want to use as an argument inside the function for another function: 当给我想用作另一个函数的函数内部参数的函数提供字符串参数时:
def function(classifier, classifier_argument, list_of_parameters):
classifier(classifier_argument=list_of_parameter[0])
classifier = someClassifier()
classifier_argument = 'someArgument'
list_of_parameters = [0,1,2,3,4,5]
func(classifier,classifier_argument,list_of_parameters)
It gives me this error: 它给了我这个错误:
TypeError: 'classifier_argument' is an invalid keyword argument for this function TypeError:“ classifier_argument”是此函数的无效关键字参数
So I know I can't pass it as a simple string, so my question is: 所以我知道我不能将它作为简单的字符串传递,所以我的问题是:
How can i pass it? 我该如何通过?
You could use **
when call function: 您可以在调用函数时使用**
:
def function(classifier, classifier_argument, list_of_parameters):
paras = {classifier_argument: list_of_parameter[0]}
classifier(**paras)
classifier = someClassifier()
classifier_argument = 'someArgument'
list_of_parameters = [0,1,2,3,4,5]
func(classifier,classifier_argument,list_of_parameters)
A more simple workable example for your quick test: 进行快速测试的更简单可行的示例:
def fun1(b):
print(b)
def fun(a):
paras = {a: 2}
fun1(**paras)
fun('b')
In my guess, you are trying to achieve your classifier creation class to be initiated with different attributes as follows ? 以我的猜测,您正在尝试实现要使用不同属性启动的分类器创建类,如下所示? You can create class attributes dynamically on you __init__
method and use **kwargs
to send the required data. 您可以在__init__
方法上动态创建类属性,并使用**kwargs
发送所需的数据。
class someClassifier(object):
def __init__(self, **kwargs):
for k, v in kwargs.items():
setattr(self, k, v)
print('setting classifier attribute', k, v)
def function(classifier, **kwargs):
classifier(**kwargs)
classifier = someClassifier
list_of_parameters = [0, 1, 2, 3, 4, 5]
classifier_argument = {
'someArgument': list_of_parameters
}
function(classifier, **classifier_argument)
def function(classifier, classifier_argument, list_of_parameters):
args = {classifier_argument:list_of_parameters}
classifier(**args)
classifier = someClassifier # Note - you need to reference the function itself, not call it!
classifier_argument = 'someArgument'
list_of_parameters = [0,1,2,3,4,5]
function(classifier,classifier_argument,list_of_parameters)
A couple of points here: you have to unpack the arguments list, and you need to pass in the classsifier function without calling it. 这里有两点:您必须解压缩参数列表,并且需要传入classsifier函数而不调用它。
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