def Rules(**rules):
    """Create a dictionary mapping symbols to alternative sequences.
    >>> Rules(A = "B C | D E")
    {'A': [['B', 'C'], ['D', 'E']]}
    """
    for (lhs, rhs) in rules.items():
        rules[lhs] = [alt.strip().split() for alt in rhs.split('|')]
    return rules
def Rules(**rules):
    """Create a dictionary mapping symbols to alternative sequences.
    >>> Rules(A = "B C | D E")
    {'A': [['B', 'C'], ['D', 'E']]}
    """
    for (lhs, rhs) in rules.items():
        rules[lhs] = [alt.strip().split() for alt in rhs.split('|')]
    return rules
def Rules ( * * rules ) : for ( lhs , rhs ) in rules . items ( ) : rules [ lhs ] = [ alt . strip ( ) . split ( ) for alt in rhs . split ( '|' ) ] return rules
Create a dictionary mapping symbols to alternative sequences.
    >>> Rules(A = "B C | D E")
    {'A': [['B', 'C'], ['D', 'E']]}
Create a dictionary mapping symbols to alternative sequences . >>> Rules ( A = B C | D E ) { A : [[ B C ] [ D E ]] }