def plot_title(ax, pretitle='<STR_LIT>', title='<STR_LIT>', posttitle='<STR_LIT>', title_fontsize=<NUM_LIT>, title_arg=None):
current_title = ax.get_title()<EOL>if not current_title:<EOL><INDENT>current_title = pretitle + title + posttitle<EOL><DEDENT>title_arg = dict_if_none(title_arg)<EOL>ax.set_title(current_title, fontsize=title_fontsize, **title_arg)<EOL>
Set title options of a matplotlib plot

    Args:
        ax: matplotlib axes
        pretitle(str): String to include before the general title of the figure
        posttitle (str): String to include after the general title of the figure
        title (str): Set the title for the figure
        title_fontsize (int): Defines the size of the title's font
        title_arg (dict): Addition arguments for matplotlib.title() call