Spread out widgets horizontally with qargparse.QArgumentParser.same_line().

parser = qargparse.QArgumentParser()
parser.add_argument("timeRange", type=qargparse.Enum, items=[
"Start/End",
"Time Slider",
"From File",
], default=2, help="Which part of the animation to import")
# Place the next widget on the same line as the previous
parser.same_line()
parser.add_argument(
"sourceStartTime",
type=qargparse.Integer,
max=999999,
default=1,
help="From where in the input animation to read from"
)
Spread out widgets horizontally with
qargparse.QArgumentParser.same_line().