Unbinding Variable Names

PyCharm doesn't seem to recognize that after a variable name has been unbound, referencing it would result in a NameError.

foo = 'bar'
del foo
print(foo)

Shouldn't PyCharm issue an "Unresolved reference 'foo'" warning on the third line?

I also have warnings in my project about "Shadowing names from outer scope" after the names have already been deleted from the namespace.