text: from __future__ import absolute_import
  import pytest
  
  from brian2 import *
  from brian2.devices.device import reinit_and_delete
  
  @pytest.mark.standalone_compatible
  def test_cuba():
      taum = 20*ms
      taue = 5*ms
      taui = 10*ms
      Vt = -50*mV
      Vr = -60*mV
      El = -49*mV
  
      eqs = '''
      dv/dt  = (ge+gi-(v-El))/taum : volt (unless refractory)
      dge/dt = -ge/taue : volt
      dgi/dt = -gi/taui : volt
      '''
  
      P = NeuronGroup(4000, eqs, threshold='v>Vt', reset='v = Vr', refractory=5*ms)
      P.v = 'Vr + rand() * (Vt - Vr)'
      P.ge = 0*mV
      P.gi = 0*mV
  
      we = (60*0.27/10)*mV # excitatory synaptic weight (voltage)
      wi = (-20*4.5/10)*mV # inhibitory synaptic weight
      Ce = Synapses(P, P, on_pre='ge += we')
      Ci = Synapses(P, P, on_pre='gi += wi')
      Ce.connect('i<3200', p=0.02)
      Ci.connect('i>=3200', p=0.02)
  
      s_mon = SpikeMonitor(P)
  
      run(10*ms)
  
      assert len(Ce)>0
      assert len(Ci)>0
  
  if __name__=='__main__':
      test_cuba()
  