"""colorbar - Plot a colorbar."""frompygmt.clibimportSessionfrompygmt.helpersimportbuild_arg_string,fmt_docstring,kwargs_to_strings,use_alias@fmt_docstring@use_alias(R="region",J="projection",B="frame",C="cmap",D="position",F="box",G="truncate",I="shading",W="scale",V="verbose",X="xshift",Y="yshift",c="panel",p="perspective",t="transparency",)@kwargs_to_strings(R="sequence",G="sequence",I="sequence",c="sequence_comma",p="sequence")defcolorbar(self,**kwargs):r""" Plot a gray or color scale-bar on maps. Both horizontal and vertical scales are supported. For CPTs with gradational colors (i.e., the lower and upper boundary of an interval have different colors) we will interpolate to give a continuous scale. Variations in intensity due to shading/illumination may be displayed by setting the ``shading`` parameter. Colors may be spaced according to a linear scale, all be equal size, or by providing a file with individual tile widths. Full option list at :gmt-docs:`colorbar.html` {aliases} Parameters ---------- frame : str or list Set color bar boundary frame, labels, and axes attributes. {CPT} position : str [**g**\|\ **j**\|\ **J**\|\ **n**\|\ **x**]\ *refpoint*\ [**+w**\ *length*\ [/\ *width*]]\ [**+e**\ [**b**\|\ **f**][*length*]]\ [**+h**\|\ **v**][**+j**\ *justify*]\ [**+m**\ [**a**\|\ **c**\|\ **l**\|\ **u**]]\ [**+n**\ [*txt*]][**+o**\ *dx*\ [/*dy*]]. Defines the reference point on the map for the color scale using one of four coordinate systems: (1) Use **g** for map (user) coordinates, (2) use **j** or **J** for setting *refpoint* via a 2-char justification code that refers to the (invisible) map domain rectangle, (3) use **n** for normalized (0-1) coordinates, or (4) use **x** for plot coordinates (inches, cm, etc.). All but **x** requires both ``region`` and ``projection`` to be specified. Append **+w** followed by the length and width of the color bar. If width is not specified then it is set to 4% of the given length. Give a negative length to reverse the scale bar. Append **+h** to get a horizontal scale [Default is vertical (**+v**)]. By default, the anchor point on the scale is assumed to be the bottom left corner (**BL**), but this can be changed by appending **+j** followed by a 2-char justification code *justify*. box : bool or str [**+c**\ *clearances*][**+g**\ *fill*][**+i**\ [[*gap*/]\ *pen*]]\ [**+p**\ [*pen*]][**+r**\ [*radius*]][**+s**\ [[*dx*/*dy*/][*shade*]]]. If set to ``True``, draws a rectangular border around the color scale. Alternatively, specify a different pen with **+p**\ *pen*. Add **+g**\ *fill* to fill the scale panel [default is no fill]. Append **+c**\ *clearance* where *clearance* is either gap, xgap/ygap, or lgap/rgap/bgap/tgap where these items are uniform, separate in x- and y-direction, or individual side spacings between scale and border. Append **+i** to draw a secondary, inner border as well. We use a uniform gap between borders of 2p and the :gmt-term:`MAP_DEFAULTS_PEN` unless other values are specified. Append **+r** to draw rounded rectangular borders instead, with a 6p corner radius. You can override this radius by appending another value. Finally, append **+s** to draw an offset background shaded region. Here, *dx/dy* indicates the shift relative to the foreground frame [4p/-4p] and shade sets the fill style to use for shading [default is gray50]. truncate : list or str *zlo*/*zhi*. Truncate the incoming CPT so that the lowest and highest z-levels are to *zlo* and *zhi*. If one of these equal NaN then we leave that end of the CPT alone. The truncation takes place before the plotting. scale : float Multiply all z-values in the CPT by the provided scale. By default the CPT is used as is. shading : str or list or bool Add illumination effects. Passing a single numerical value sets the range of intensities from -value to +value. If not specified, 1 is used. Alternatively, set ``shading=[low, high]`` to specify an asymmetric intensity range from *low* to *high*. [Default is no illumination]. {V} {XY} {c} {p} {t} """kwargs=self._preprocess(**kwargs)# pylint: disable=protected-accesswithSession()aslib:lib.call_module("colorbar",build_arg_string(kwargs))