SomeFixedCode_1.py

        self.global_node_coordinates = [[0,0,0] for c in range(len(g_x_data))]
        for i, x in enumerate(g_x_data):
            self.global_node_coordinates[i][0] = x
            if self.highest_global_x == None or x > self.highest_global_x:
                self.highest_global_x = x
            if self.lowest_global_x == None or x < self.lowest_global_x:
                self.lowest_global_x = x
        for i, y in enumerate(g_y_data):
            self.global_node_coordinates[i][1] = y
            if self.highest_global_y == None or y > self.highest_global_y:
                self.highest_global_y = y
            if self.lowest_global_y == None or y < self.lowest_global_y:
                self.lowest_global_y = y
        for i, z in enumerate(g_z_data):
            self.global_node_coordinates[i][2] = z
            if self.highest_global_z == None or z > self.highest_global_z:
                self.highest_global_z = z
            if self.lowest_global_z == None or z < self.lowest_global_z:
                self.lowest_global_z = z