<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def stacked_node_layout(self,EdgeAttribute=None,network=None,NodeAttribute=None,\ 		nodeList=None,x_position=None,y_start_position=None,verbose=None):
 		""" 		Execute the Stacked Node Layout on a network. 		:param EdgeAttribute (string, optional):
 The name of the edge column contai 			ning numeric values that will be used as weights in the layout algor 			ithm. Only columns containing numeric values are shown 		:param network (string, optional):
 Specifies a network by name, or by SUID 			if the prefix SUID: is used. The keyword CURRENT, or a blank value c 			an also be used to specify the current network. 		:param NodeAttribute (string, optional):
 The name of the node column contai 			ning numeric values that will be used as weights in the layout algor 			ithm. Only columns containing numeric values are shown 		:param nodeList (string, optional):
 Specifies a list of nodes. The keywords 				all, selected, or unselected can be used to specify nodes by their 			selection state. The pattern COLUMN:VALUE sets this parameter to any 				rows that contain the specified column value; if the COLUMN prefix 			is not used, the NAME column is matched by default. A list of COLUMN 			used to match multiple values. 		:param x_position (string, optional):
 X start position, in numeric value 		:param y_start_position (string, optional):
 Y start position, in numeric va 			lue 		"""

		network=check_network(self,network,verbose=verbose)
		PARAMS=set_param(['EdgeAttribute','network','NodeAttribute','nodeList',\
		'x_position','y_start_position'],[EdgeAttribute,network,NodeAttribute,\
		nodeList,x_position,y_start_position])
		response=api(url=self.__url+"/stacked-node-layout", PARAMS=PARAMS, method="POST", verbose=verbose)
		return response