synaptic.py has sth wrong

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Description

When I use snn.Synaptic, something unexpected happened. So I check the synaptic.py, i found the 219line "self.syn = mem" should be replaced with "self.syn = syn". I done this in my local computer, Things have become normal now

What I Did

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[Roiwa]

Agreed! I have the same issue while making tutorial 4.

Nevertheless, I think the correct way to use Synaptic is to instantiate the neuron:
lif1 = snn.Synaptic(alpha=alpha, beta=beta)
Then initialize the neuron:
syn, mem = lif1.init_synaptic(). In fact, nowadays, we have to use syn, mem = lif1.reset_mem()
and while calling the neuron we need to use:
spk_out, syn, mem = lif1(spk_in[step]),
instead of spk_out, syn, mem = lif1(spk_in[step],syn,mem), as it uses syn and mem attributes (self.syn and self.mem)