src/basilisp/lang/runtime.py
def first(o):
    """If o is a ISeq, return the first element from o. If o is None, return
    None. Otherwise, coerces o to a Seq and returns the first."""
    if o is None:
        return None
    if isinstance(o, ISeq):
        return o.first
    s = to_seq(o)
    if s is None:
        return None
    return s.first
def first(o):
    """If o is a ISeq, return the first element from o. If o is None, return
    None. Otherwise, coerces o to a Seq and returns the first."""
    if o is None:
        return None
    if isinstance(o, ISeq):
        return o.first
    s = to_seq(o)
    if s is None:
        return None
    return s.first
def first ( o ) : if o is None : return None if isinstance ( o , ISeq ) : return o . first s = to_seq ( o ) if s is None : return None return s . first
If o is a ISeq, return the first element from o. If o is None, return
    None. Otherwise, coerces o to a Seq and returns the first.
If o is a ISeq return the first element from o . If o is None return None . Otherwise coerces o to a Seq and returns the first .