Consolidate setvars setting of plotvars attributes

[sadielbartholomew]

Similarly to #49, but more specifically, there is a long code block of logically-similar conditional setting which can and should be reduced down to three or so lines using setattr(), since the statements all have the same structure:

cf-plot/cfplot/cfplot.py

Lines 8275 to 8381 in efe94c7

	if file is not None:
	plotvars.file = file
	# TODO SLB consolidate this long list of conditional setting!
	if title_fontsize is not None:
	plotvars.title_fontsize = title_fontsize
	if axis_label_fontsize is not None:
	plotvars.axis_label_fontsize = axis_label_fontsize
	if continent_thickness is not None:
	plotvars.continent_thickness = continent_thickness
	if continent_color is not None:
	plotvars.continent_color = continent_color
	if continent_linestyle is not None:
	plotvars.continent_linestyle = continent_linestyle
	if text_fontsize is not None:
	plotvars.text_fontsize = colorbar_fontsize
	if colorbar_fontsize is not None:
	plotvars.colorbar_fontsize = colorbar_fontsize
	if text_fontweight is not None:
	plotvars.text_fontweight = text_fontweight
	if axis_label_fontweight is not None:
	plotvars.axis_label_fontweight = axis_label_fontweight
	if colorbar_fontweight is not None:
	plotvars.colorbar_fontweight = colorbar_fontweight
	if title_fontweight is not None:
	plotvars.title_fontweight = title_fontweight
	if viewer is not None:
	plotvars.viewer = viewer
	if tspace_year is not None:
	plotvars.tspace_year = tspace_year
	if tspace_month is not None:
	plotvars.tspace_month = tspace_month
	if tspace_day is not None:
	plotvars.tspace_day = tspace_day
	if tspace_hour is not None:
	plotvars.tspace_hour = tspace_hour
	if xtick_label_rotation is not None:
	plotvars.xtick_label_rotation = xtick_label_rotation
	if xtick_label_align is not None:
	plotvars.xtick_label_align = xtick_label_align
	if ytick_label_rotation is not None:
	plotvars.ytick_label_rotation = ytick_label_rotation
	if ytick_label_align is not None:
	plotvars.ytick_label_align = ytick_label_align
	if legend_text_size is not None:
	plotvars.legend_text_size = legend_text_size
	if legend_text_weight is not None:
	plotvars.legend_text_weight = legend_text_weight
	if cs_uniform is not None:
	plotvars.cs_uniform = cs_uniform
	if master_title is not None:
	plotvars.master_title = master_title
	if master_title_location is not None:
	plotvars.master_title_location = master_title_location
	if master_title_fontsize is not None:
	plotvars.master_title_fontsize = master_title_fontsize
	if master_title_fontweight is not None:
	plotvars.master_title_fontweight = master_title_fontweight
	if dpi is not None:
	plotvars.dpi = dpi
	if land_color is not None:
	plotvars.land_color = land_color
	if ocean_color is not None:
	plotvars.ocean_color = ocean_color
	if lake_color is not None:
	plotvars.lake_color = lake_color
	if feature_zorder is not None:
	plotvars.feature_zorder = 999
	if rotated_grid_spacing is not None:
	plotvars.rotated_grid_spacing = rotated_grid_spacing
	if rotated_deg_spacing is not None:
	plotvars.rotated_deg_spacing = rotated_deg_spacing
	if rotated_grid_thickness is not None:
	plotvars.rotated_grid_thickness = rotated_grid_thickness
	if rotated_continents is not None:
	plotvars.rotated_continents = rotated_continents
	if rotated_grid is not None:
	plotvars.rotated_grid = rotated_grid
	if rotated_labels is not None:
	plotvars.rotated_labels = rotated_labels
	if legend_frame is not None:
	plotvars.legend_frame = legend_frame
	if legend_frame_edge_color is not None:
	plotvars.legend_frame_edge_color = legend_frame_edge_color
	if legend_frame_face_color is not None:
	plotvars.legend_frame_face_color = legend_frame_face_color
	if degsym is not None:
	plotvars.degsym = degsym
	if axis_width is not None:
	plotvars.axis_width = axis_width
	if grid is not None:
	plotvars.grid = grid
	if grid_x_spacing is not None:
	plotvars.grid_x_spacing = grid_x_spacing
	if grid_y_spacing is not None:
	plotvars.grid_y_spacing = grid_y_spacing
	if grid_colour is not None:
	plotvars.grid_colour = grid_colour
	if grid_linestyle is not None:
	plotvars.grid_linestyle = grid_linestyle
	if grid_thickness is not None:
	plotvars.grid_thickness = grid_thickness
	if grid_zorder is not None:
	plotvars.grid_zorder = grid_zorder
	if tight is not None:
	plotvars.tight = tight
	if level_spacing is not None:
	plotvars.level_spacing = level_spacing