Passing dict to constructor?

I'd like to pass a dict to an object's constructor for use as kwargs.

Obviously:

foo = SomeClass(mydict)

Simply passes a single argument, rather than the dict's contents. Alas:

foo = SomeClass(kwargs=mydict)

Which seems more sensible doesn't work either. What am I 开发者_开发知识库missing?

Use :

foo = SomeClass(**mydict)

this will unpack the dict value and pass them to the function.

For example:

mydict = {'a': 1, 'b': 2}

SomeClass(**mydict) # Equivalent to : SomeClass(a=1, b=2)

To pass a dictionary to a constructor you have to do so by reference, which is by preceding it with **, like so:

foo = SomeClass(**mydict)

Try this: SomeClass(**mydict)