Function py_ping_step 

fn py_ping_step<'py>(
    _py: Python<'py>,
    v_e: PyReadwriteArray1<'_, f64>,
    g_ampa_e: PyReadwriteArray1<'_, f64>,
    g_gaba_e: PyReadwriteArray1<'_, f64>,
    refrac_e: PyReadwriteArray1<'_, f64>,
    i_drive_e: PyReadonlyArray1<'_, f64>,
    xi_e: PyReadonlyArray1<'_, f64>,
    spikes_e_out: PyReadwriteArray1<'_, u8>,
    v_i: PyReadwriteArray1<'_, f64>,
    g_ampa_i: PyReadwriteArray1<'_, f64>,
    g_gaba_i: PyReadwriteArray1<'_, f64>,
    refrac_i: PyReadwriteArray1<'_, f64>,
    i_drive_i: PyReadonlyArray1<'_, f64>,
    xi_i: PyReadonlyArray1<'_, f64>,
    spikes_i_out: PyReadwriteArray1<'_, u8>,
    e_l: f64,
    e_ampa: f64,
    e_gaba: f64,
    g_l: f64,
    c_m: f64,
    v_threshold: f64,
    v_reset: f64,
    t_refrac: f64,
    tau_ampa: f64,
    tau_gaba: f64,
    sigma_e: f64,
    sigma_i: f64,
    dt: f64,
) -> PyResult<(u32, u32)>

Advance excitatory and inhibitory PING populations by one time step.

The caller supplies per-instance state arrays and pre-drawn noise samples so Python and Rust preserve the same seeded random sequence. State and spike arrays are updated in place; the return value contains the two population spike counts needed for the caller’s conductance update.