The variables in the theme module can
also be set from the command line. To do this, the program
that imports  PyChart must call theme.get_options in the
beginning, because PyChart itself is just a library. Below is an example.
| ARGV = sys.argv[1:]) | 
sys.argv[1:].
    The options supported are: "--format=[ps,png,pdf,x11,svg]",
    "--output=file", "--color=[yes,no]"
    "--scale=X", "--font-family=name", "--font-size=X",
    "--line-width=X",
    "--debug-level=N", "bbox=left,bottom,right,top".
    The below code shows an example.