def set_pkg_vers(self, doc, version):
        """Sets package version, if not already set.
        version - Any string.
        Raises CardinalityError if already has a version.
        Raises OrderError if no package previously defined.
        """
        self.assert_package_exists()
        if not self.package_vers_set:
            self.package_vers_set = True
            doc.package.version = version
            return True
        else:
            raise CardinalityError('Package::Version')
def set_pkg_vers(self, doc, version):
        """Sets package version, if not already set.
        version - Any string.
        Raises CardinalityError if already has a version.
        Raises OrderError if no package previously defined.
        """
        self.assert_package_exists()
        if not self.package_vers_set:
            self.package_vers_set = True
            doc.package.version = version
            return True
        else:
            raise CardinalityError('Package::Version')
def set_pkg_vers ( self , doc , version ) : self . assert_package_exists ( ) if not self . package_vers_set : self . package_vers_set = True doc . package . version = version return True else : raise CardinalityError ( 'Package::Version' )
Sets package version, if not already set.
        version - Any string.
        Raises CardinalityError if already has a version.
        Raises OrderError if no package previously defined.
Sets package version if not already set . version - Any string . Raises CardinalityError if already has a version . Raises OrderError if no package previously defined .