__init__.py 文件源码

def visit_Delete(self, node):
        """
        Delete(expr* targets)
        """
        id = ''
        num = ''
        key = ''
        slice = ''
        attr = ''
        for stmt in node.targets:
            if isinstance(stmt, (ast.Name)):
                id = self.visit(stmt)
            elif isinstance(stmt, (ast.Subscript)):
                if isinstance(stmt.value, (ast.Name)):
                    id = self.visit(stmt.value)
                if isinstance(stmt.slice, (ast.Index)):
                    if isinstance(stmt.slice.value, (ast.Str)):
                        key = self.visit(stmt.slice)
                    if isinstance(stmt.slice.value, (ast.Num)):
                        num = self.visit(stmt.slice)
                if isinstance(stmt.slice, (ast.Slice)):
                    slice = self.visit(stmt.slice)
            elif isinstance(stmt, (ast.Attribute)):
                if isinstance(stmt.value, (ast.Name)):
                    id = self.visit(stmt.value)
                attr = stmt.attr
        if num != '':
            """ <Python> del foo[0]
                <Ruby>   foo.delete_at[0] """
            self.write("%s.delete_at(%s)" % (id, num))
        elif key != '':
            """ <Python> del foo['hoge']
                <Ruby>   foo.delete['hoge'] """
            self.write("%s.delete(%s)" % (id, key))
        elif slice != '':
            """ <Python> del foo[1:3]
                <Ruby>   foo.slise!(1...3) """
            self.write("%s.slice!(%s)" % (id, slice))
        elif attr != '':
            """ <Python> del foo.bar
                <Ruby>   foo.instance_eval { remove_instance_variable(:@bar) } """
            self.write("%s.instance_eval { remove_instance_variable(:@%s) }" % (id, attr))
        else:
            """ <Python> del foo
                <Ruby>   foo = nil """
            self.write("%s = nil" % (id))