multiple-file context manager

gistfile1.py

class openFiles(object):
    def __init__(self, *args):
        if not all(isinstance(arg, tuple) for arg in args):
            raise TypeError('arguments to openFiles must all be 2-tuples')
        if not all(len(arg) in (1, 2) for arg in args):
            raise TypeError('arguments to openFiles must all be 2-tuples')
        self.args = args

    def __enter__(self):
        self.fhs = [file(*arg) for arg in self.args]
        return self.fhs

    def __exit__(self, type, value, traceback):
        for f in self.fhs:
            f.close()

with openFiles(('test.txt', 'r'), ('test2.txt', 'r')) as ll:
    print ll