#NEWLINE# def tailo( x , coll ) : #NEWLINE# #INDENT# ' x is the tail of coll\n\n    See also:\n        heado\n        conso\n    ' #NEWLINE# if ( not isinstance ( x , tuple ) ) : #NEWLINE# #INDENT# raise EarlyGoalError ( ) #NEWLINE# #UNINDENT# if ( isinstance ( coll , tuple ) and ( len ( coll ) >= 1 ) ) : #NEWLINE# #INDENT# return ( eq , x , coll [ 1 : ] ) #NEWLINE# #UNINDENT# else : #NEWLINE# #INDENT# return fail