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class GribFile(eccodes.high_level.codesfile.CodesFile)

A GRIB file handle meant for use in a context manager.

Individual messages can be accessed using the ``next`` method. Of course,

it is also possible to iterate over each message in the file::

>>> with GribFile(filename) as grib:

...     # Print number of messages in file

...     len(grib)

...     # Open all messages in file

...     for msg in grib:

...         print(msg[key_name])

...     len(grib.open_messages)

>>> # When the file is closed, any open messages are closed

>>> len(grib.open_messages)