Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #22347

Re: question about file handling with "with"

Show all headers | View raw

On Wed, 28 Mar 2012 11:31:21 +0200, Jabba Laci wrote:

> Is the following function correct? Is the input file closed in order?
> 
> def read_data_file(self):
>     with open(self.data_file) as f:
>         return json.loads(f.read())

Yes.

The whole point of being able to use a file as a context manager is so
that the file will be closed immediately upon leaving the with statement,
whether by falling off the end, "return", an exception, or whatever.

IOW, it's like calling .close() immediately after the "with" block, only
more so, i.e. it will also handle cases that an explicit .close() misses.

Back to comp.lang.python | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

question about file handling with "with" Jabba Laci <jabba.laci@gmail.com> - 2012-03-28 11:31 +0200
  Re: question about file handling with "with" Nobody <nobody@nowhere.com> - 2012-03-29 17:25 +0100

csiph-web