Incompatible function arguments

I have created a flowgraph which has a hierarchical block called Receive. In the Receive block is a Head block.

 

The primary block has an OOT containing a callback in which I wish to call the reset() function in the Head block as follows:

 

        Receive.blocks.head.reset()

 

This call results in the following error:

        TypeError: reset(): incompatible function arguments. The following argument types are supported:

        1. (self: gnuradio.blocks_python.head) –> None

 

I'm confused since reset takes no arguments and I don't understand the meaning of the argument types shown.

 

Jim

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