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I'm currently using code similar to this

# Returns PKG-INFO in "email format", meaning it looks a little like this:
#   Name: some_python_module
#   Version: 1.2.3
dist = pkg_resources.get_distribution('some_python_module')
pkginfo = dist.get_metadata(dist.PKG_INFO)

d = dict(line.split(': ', 1) for line in pkginfo.split('\n') if ': ' in line)
print(d['Name'])

I'm wondering if there is a "clean" way to do this key lookup for a Distribution object?

Note I am using custom properties here so doing dist.project_name or dist.version are not enough in my particular case.

xjcl
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  • I am confused about the difference between PKG-INFO and METADATA. Both seem to contain the same information? But sometimes PKG-INFO seems to be missing? – xjcl Feb 10 '21 at 15:06
  • `python setup.py install` seems to result in `PKG-INFO` and `python setup.py bdist_wheel` in `METADATA`. – xjcl Feb 10 '21 at 15:28

1 Answers1

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Stolen from _parsed_pkg_info in DistInfoDistribution:

dist = pkg_resources.get_distribution('some_python_module')
pkginfo = dist.get_metadata(dist.PKG_INFO)

parsed = email.parser.Parser().parsestr(pkginfo)
print(parsed['Name'])

Not sure why this method is not in Distribution as it appears to work for both DistInfoDistribution and EggInfoDistribution -- this is what dist.PKG_INFO is for by the way, this variable differs between those two ('METADATA' for .dist-info and 'PKG-INFO' for .egg-info).

Little note: parsestr returns a FeedParser object which outputs the parsed input feed when you call print on it -- do not get confused by this, it's not a str. Also note that spaces are not allowed in key names by the RFC and lead to silent parser errors!

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xjcl
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