[issue11344] Add height argument to os.path.dirname()
blokeley
report at bugs.python.org
Sun Feb 27 09:26:48 CET 2011
New submission from blokeley <blokeley at gmail.com>:
It is a common need to find the grandparent or great-grandparent (etc.) of a given directory, which results in this:
>>> from os.path import dirname
>>> mydir = dirname(dirname(dirname(path)))
Could a "height" parameter be added to os.path.dirname so it becomes:
>>> def dirname(path, height=1):
Then we could have usage like:
>>> path = '/ggparent/gparent/parent/myfile.txt'
>>> from os.path import dirname
>>> dirname(path)
/ggparent/gparent/parent
>>> dirname(path, 2)
/ggparent/gparent
>>> dirname(path, 3)
/ggparent
Perhaps we should throw ValueErrors for invalid height values:
>>> dirname(path, 10)
ValueError
>>> dirname(path, -1)
ValueError
Perhaps a height of 0 should do nothing:
>>> dirname(path, 0)
/ggparent/gparent/parent/myfile.txt
I can supply patches, unit tests and docs if you like.
----------
components: Library (Lib)
messages: 129616
nosy: blokeley
priority: normal
severity: normal
status: open
title: Add height argument to os.path.dirname()
type: feature request
versions: Python 3.3
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<http://bugs.python.org/issue11344>
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