def var_set(session, **kwargs):
        """
        Sets the given variables or prints the current ones. "set answer=42"
        """
        if not kwargs:
            for name, value in session.variables.items():
                session.write_line("{0}={1}".format(name, value))
        else:
            for name, value in kwargs.items():
                name = name.strip()
                session.set(name, value)
                session.write_line("{0}={1}", name, value)