human
Solve the following python programming problem given the following code:
def assign_module_to_layers_no_gaps(self) : 
    if (len (self.wf.modules) == 0) : 
        return 
visited = set () 
    min_layer = [0] 
    def set_module_layer_number(module, layer_number) : 
        module.layout_layer_number = layer_number 
        visited.add (module) 
        min_layer [0] = min (min_layer [0], layer_number) 
        for port in module.input_ports : 
            for conn in port.connections : 
                if (conn.source_port.module not in visited) : 
                    set_module_layer_number (conn.source_port.module, (layer_number - 1)) 
for port in module.output_ports : 
            for conn in port.connections : 
                if (conn.target_port.module not in visited) : 
                    set_module_layer_number (conn.target_port.module, (layer_number + 1)) 
set_module_layer_number (self.wf.modules [0], 0) 
    if (min_layer [0] < 0) : 
        for module in self.wf.modules : 
            module.layout_layer_number -= self [0] 

    
    

    Fix the buggy line: module.layout_layer_number -= self [0]
assistant
#Here is Python code to fix the buggy line: module.

module.layout_layer_number -= min_layer [0]