readPBinfo (
        fileName,
        category=None,
        clearCategory=1,
        lineWidth=None,
        drawMode=None,
        leftModel=None,
        rightModel=None,
        defColor=None,
        )
read a file containing pseudobond info and display those bonds
           category defaults to fileName.  clearCategory controls
           whether the pseudobond group should be cleared of pre-existing
           pseudobonds before reading the file.  lineWidth is a floating-
           point number and controls the width of lines used to draw the
           pseudobonds.  This only is relevant if drawMode is Wire.
           drawMode controls the depiction style of the pseudobonds.
           Possible modes are: 
-                 Wire (aka chimera.Bond_Wire)
 
- wireframe
                Stick (aka chimera.Bond_Stick) -- sticks
 
 
           leftModel and rightModel control what models the endpoints
           of the pseudobond lie in, if none are specified in the input file.
           defColor is the color assigned to the pseudobond group as a whole,
           which can be overridden by specific pseudobonds. 
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