pip requirements file
will output a list of current packages and their requirements. I have one package that falsely  lists another
package as a requirement, which was blocking installation as the false requirement wasn't available.
Is there a way to modify that output (which would be piped to, for example, requirements.txt) to have
pip install -r requirements.txt
so pip ignores that one (and only that one) dependency?
 For the curious, the package is ZSA, and it list PyXML even though one of its modules says it was created
specifically so PyXML is no longer needed -- and none of the modules import PyXML anywhere.