Represent an argument that must be passed as a keyword to gnuplot.

Some gnuplot options take the form of single unquoted keywords (possibly preceded by a fixed keyword). We allow those to be passed as strings option="keyword". Check that the option supplied is in the list of allowed options.

Members:

fixedword

the fixed keyword that must precede the variable keyword in the gnuplot command, or None if none is required.

options

a list of strings containing the legal alternatives for this argument.

__call__ ( self,  keyw )

__init__ (
        self,
        argname,
        options,
        fixedword=None,
        default=None,
        )