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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def SetupPrometheusExportsFromConfig():
 """Exports metrics so Prometheus can collect them."""

    port = getattr(settings, 'PROMETHEUS_METRICS_EXPORT_PORT', None)
    port_range = getattr(
        settings, 'PROMETHEUS_METRICS_EXPORT_PORT_RANGE', None)
    addr = getattr(settings, 'PROMETHEUS_METRICS_EXPORT_ADDRESS', '')
    if port_range:
        SetupPrometheusEndpointOnPortRange(port_range, addr)
    elif port:
        SetupPrometheusEndpointOnPort(port, addr)