xlabel, ylabel : str or None, optional
Userprovided lables for the xaxis and yaxis. If None (default),
other values are used depending on the status of the kwarg other.
line : str {‘45’, ‘s’, ‘r’, q’} or None, optional
Options for the reference line to which the data is compared:
 ‘45’  45degree line
 ‘s’  standardized line, the expected order statistics are scaled
by the standard deviation of the given sample and have the mean
added to them
 ‘r’  A regression line is fit
 ‘q’  A line is fit through the quartiles.
 None  by default no reference line is added to the plot.
exceed : boolean, optional
 If False (default) the raw sample quantiles are plotted against
the theoretical quantiles, show the probability that a sample
will not exceed a given value
 If True, the theoretical quantiles are flipped such that the
figure displays the probability that a sample will exceed a
given value.
ax : Matplotlib AxesSubplot instance, optional
If given, this subplot is used to plot in instead of a new figure
being created.
**plotkwargs : additional matplotlib arguments to be passed to the
