your context manager

[devanshkv]

All files should be closed after reading. psrfits does that to some extent but for filterbanks it needs to be self.fp.close().

Those who do not know about the inner workings wouldn't know how to close files.
Should we introduce a context manager for your? the idea would be to do something like:

import your

with your.Your("your_files") as your_object:
    your_object.do_stuff()

implementation is fairly easy, we can create __enter__ and __exit__ in your.Your as follows:

def __enter__(self):
    # no need to do anything here
    return self

def __exit__(self, exc_type, exc_value, exc_traceback):
    # we implement .close_files() in all format classes
    return self.formatclass.close_files()

[KshitijAggarwal]

I think this would be useful. What changes would be required to the Candidate and Writer class? where Your is either being inherited or is saved as an attribute.