openpyxl leaving file open after reading?

[raf]

hi,

i've just come to the conclusion that openpyxl, when
just reading an xlsx file, leaves it open when the
reading is complete. i found this out because a
subsequent attempt to rename the file on windows fails
(because some process has the file is open). when i
added an explicit workbook.close() method after
reading, the problem went away.

i'm using openpyxl-2.6.4 with python-2.7 and i assume
that the bug won't be fixed there but i didn't notice
any mention of it in the changelog for later, python-3
only versions of openpyxl, which may or may not exhibit
the same problem.

so, any openpyxl developers listening, you might want
to determine if this is a real bug in the latest
version and, if so, fix it. if this behaviour is
happening but isn't considered to be a bug, then please
improve the simple reading examples in the
documentation by including code to close the file after
reading so the behaviour doesn't surprise anyone else.

cheers,
raf