python - Use with statement in a class that wraps a resource -

if have class wraps resource, e.g., sqlite database connection or file, there way can use with statement close resource when object goes out of scope or gcollected?

to clarify mean, want avoid this:

class x:     def __init__(self):         # open resource      def close(self): # or __del__, worst         # close resource 

but make in such way resource freed in

with open('foo') f:     # use resource 

you need provide __enter__ , __exit__ methods. see pep 343.

this pep adds new statement "with" python language make possible factor out standard uses of try/finally statements.

in pep, context managers provide __enter__() , __exit__() methods invoked on entry , exit body of statement.