/usr/lib/python3/dist-packages/zmq/utils/ is in python3-zmq 15.2.0-0ubuntu4.
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/usr/lib/python3/dist-packages/zmq/utils/__init__.py
/usr/lib/python3/dist-packages/zmq/utils/buffers.pxd
/usr/lib/python3/dist-packages/zmq/utils/constant_names.py
/usr/lib/python3/dist-packages/zmq/utils/garbage.py
/usr/lib/python3/dist-packages/zmq/utils/getpid_compat.h
/usr/lib/python3/dist-packages/zmq/utils/interop.py
/usr/lib/python3/dist-packages/zmq/utils/ipcmaxlen.h
/usr/lib/python3/dist-packages/zmq/utils/jsonapi.py
/usr/lib/python3/dist-packages/zmq/utils/monitor.py
/usr/lib/python3/dist-packages/zmq/utils/pyversion_compat.h
/usr/lib/python3/dist-packages/zmq/utils/sixcerpt.py
/usr/lib/python3/dist-packages/zmq/utils/strtypes.py
/usr/lib/python3/dist-packages/zmq/utils/win32.py
/usr/lib/python3/dist-packages/zmq/utils/z85.py
/usr/lib/python3/dist-packages/zmq/utils/zmq_compat.h
/usr/lib/python3/dist-packages/zmq/utils/zmq_constants.h