[Rpm-maint] [rpm-software-management/rpm] pythondistdeps: Switch to importlib.metadata (#1317)

[Steve Kowalik]

@s-t-e-v-e-n-k commented on this pull request.



>  from warnings import warn
 
+try:
+    from importlib.metadata import PathDistribution
+except ImportError:
+    from importlib_metadata import PathDistribution
+
+try:
+    from pathlib import Path
+except ImportError:
+    from pathlib2 import Path
+
+
+class Req(Requirement):
+    @property
+    def key(self):
+        return self.name.lower().replace('_', '-')

Which is a massive layering violation. I'll have a think on this.

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