(self, xform_map)
:param xform_map: a dictionary mapping psuedo-field names to transform
            functions. The function should take a
            :class:`whoosh.qparser.SyntaxNode` as an argument, and return a
            :class:`~whoosh.qparser.SyntaxNode`. If the function returns None,
            the node will be removed from the query.
:param xform_map: a dictionary mapping psuedo-field names to transform
            functions. The function should take a
            :class:`whoosh.qparser.SyntaxNode` as an argument, and return a
            :class:`~whoosh.qparser.SyntaxNode`. If the function returns None,
            the node will be removed from the query.
: param xform_map : a dictionary mapping psuedo - field names to transform functions . The function should take a : class : whoosh . qparser . SyntaxNode as an argument and return a : class : ~whoosh . qparser . SyntaxNode . If the function returns None the node will be removed from the query .
def __init__(self, xform_map):
        """
        :param xform_map: a dictionary mapping psuedo-field names to transform
            functions. The function should take a
            :class:`whoosh.qparser.SyntaxNode` as an argument, and return a
            :class:`~whoosh.qparser.SyntaxNode`. If the function returns None,
            the node will be removed from the query.
        """

        self.xform_map = xform_map
def __init__ ( self , xform_map ) : self . xform_map = xform_map