Thank you for making this merge request.

I have been considering the 'pid' package instead https://pypi.org/project/pid/ — can you explain the differences, and why you've chosen 'filelock' instead?

Please leave this blank line in place; it helps the code formatting conform to PEP 8.

How do these statements help this custom class? Are these not the defaults for filelock.FileLock, or have I misunderstood?

It would be good to see an entry in the ChangeLog document, explaining the transition from one dependency to the other.

See earlier in the ChangeLog document for examples; you would make a new "Bugs fixed" entry under "Version NEXT", I think.

Please see the PEP 8 guidance on how to separate import statements in a module.
The groupings (separated each by a blank line) should be:

• __future__ imports; then
• Standard library imports; then
• Third-party library imports; then
• Local imports.

Now that python-daemon has dropped support for Python earlier than version 2, we can probably omit the explicit inheritance from object. Does the code continue to work (and pass tests) without that?

Thank you for updating the test cases.

Please be sure to go through all the docstrings everywhere and change references to lockfile (and other corresponding names that have changed), which are now outdated.

Any update?