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       setInfinity([attribute=string], [controlPoints=boolean], [hierarchy=string], [postInfinite=string], [preInfinite=string], [shape=boolean])  
Note: Strings representing object names and arguments must be separated by commas. This is not depicted in the synopsis.
      setInfinity is undoable, queryable, and editable.
      Set the infinity type before (after) a paramCurve's first
(last) keyframe.
	  
      
      None
In query mode, return type is based on queried flag.
      
      copyKey, cutKey, findKeyframe, keyTangent, keyframe, keyframeOutliner, keyframeStats, pasteKey, scaleKey, snapKey
      
    
      attribute, controlPoints, hierarchy, postInfinite, preInfinite, shape
      
		
		  | Long name (short name) | Argument types | Properties | 
		
	
	  | attribute(at) | string |    | 
	
	  | 
	      
		|  | List of attributes to select In query mode, this flag needs a value. |  | 
	
	  | hierarchy(hi) | string |   | 
	
	  | 
	      
		|  | Hierarchy expansion options.  Valid values are "above,"
"below," "both," and "none." (Not valid for "pasteKey" cmd.) In query mode, this flag needs a value. |  | 
	
	  | shape(s) | boolean |   | 
	
	  | 
	      
		|  | Consider attributes of shapes below transforms as well,
except "controlPoints".  Default: true.  (Not valid for "pasteKey" cmd.) In query mode, this flag needs a value. |  | 
	
	  | controlPoints(cp) | boolean |   | 
	
	  | 
	      
		|  | This flag explicitly specifies whether or not to include the
control points of a shape (see "-s" flag) in the list of attributes.
Default: false.  (Not valid for "pasteKey" cmd.) In query mode, this flag needs a value. |  | 
	
	  | preInfinite(pri) | string |    | 
	
	  | 
	      
		|  | Set the infinity type before a paramCurve's first keyframe. Valid
values are "constant", "linear", "cycle", "cycleRelative", "oscillate". |  | 
	
	  | postInfinite(poi) | string |    | 
	
	  | 
	      
		|  | Set the infinity type after a paramCurve's last keyframe. Valid
values are "constant", "linear", "cycle", "cycleRelative", "oscillate". |  | 
      
      
		
		  
			|  Flag can appear in Create mode of command |  Flag can appear in Edit mode of command | 
		  
			|  Flag can appear in Query mode of command |  Flag can have multiple arguments, passed either as a tuple or a list. | 
		
import maya.cmds as cmds
cmds.setInfinity( pri='linear', poi='constant' )