src/basilisp/lang/runtime.py
def cons(o, seq) -> ISeq:
    """Creates a new sequence where o is the first element and seq is the rest.
    If seq is None, return a list containing o. If seq is not a ISeq, attempt
    to coerce it to a ISeq and then cons o onto the resulting sequence."""
    if seq is None:
        return llist.l(o)
    if isinstance(seq, ISeq):
        return seq.cons(o)
    return Maybe(to_seq(seq)).map(lambda s: s.cons(o)).or_else(lambda: llist.l(o))
def cons(o, seq) -> ISeq:
    """Creates a new sequence where o is the first element and seq is the rest.
    If seq is None, return a list containing o. If seq is not a ISeq, attempt
    to coerce it to a ISeq and then cons o onto the resulting sequence."""
    if seq is None:
        return llist.l(o)
    if isinstance(seq, ISeq):
        return seq.cons(o)
    return Maybe(to_seq(seq)).map(lambda s: s.cons(o)).or_else(lambda: llist.l(o))
def cons ( o , seq ) -> ISeq : if seq is None : return llist . l ( o ) if isinstance ( seq , ISeq ) : return seq . cons ( o ) return Maybe ( to_seq ( seq ) ) . map ( lambda s : s . cons ( o ) ) . or_else ( lambda : llist . l ( o ) )
Creates a new sequence where o is the first element and seq is the rest.
    If seq is None, return a list containing o. If seq is not a ISeq, attempt
    to coerce it to a ISeq and then cons o onto the resulting sequence.
Creates a new sequence where o is the first element and seq is the rest . If seq is None return a list containing o . If seq is not a ISeq attempt to coerce it to a ISeq and then cons o onto the resulting sequence .