def set_main_css(css_file):
 assert css_file.endswith('.css')
 new_css = css_file
 app_globals.main_css = str(new_css)

def set_main_css ( css_file ) : assert css_file . endswith ( '.css' ) new_css = css_file app_globals . main_css = str ( new_css )
sets the main_css .