catkin_make時出現錯誤提示如下：

catkin_make
Base path: /home/efsz/zmq_to_ros
Source space: /home/efsz/zmq_to_ros/src
Build space: /home/efsz/zmq_to_ros/build
Devel space: /home/efsz/zmq_to_ros/devel
Install space: /home/efsz/zmq_to_ros/install
Creating symlink "/home/efsz/zmq_to_ros/src/CMakeLists.txt" pointing to "/opt/ros/noetic/share/catkin/cmake/toplevel.cmake"
####
#### Running command: "cmake /home/efsz/zmq_to_ros/src -DCATKIN_DEVEL_PREFIX=/home/efsz/zmq_to_ros/devel -DCMAKE_INSTALL_PREFIX=/home/efsz/zmq_to_ros/install -G Unix Makefiles" in "/home/efsz/zmq_to_ros/build"
####
-- The C compiler identification is GNU 9.4.0
-- The CXX compiler identification is GNU 9.4.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Using CATKIN_DEVEL_PREFIX: /home/efsz/zmq_to_ros/devel
-- Using CMAKE_PREFIX_PATH: /opt/ros/noetic
-- This workspace overlays: /opt/ros/noetic
-- Found PythonInterp: /home/efsz/anaconda3/bin/python3 (found suitable version "3.9.13", minimum required is "3")
-- Using PYTHON_EXECUTABLE: /home/efsz/anaconda3/bin/python3
-- Using Debian Python package layout
-- Could NOT find PY_em (missing: PY_EM)
CMake Error at /opt/ros/noetic/share/catkin/cmake/empy.cmake:30 (message):
? Unable to find either executable 'empy' or Python module 'em'...? try
? installing the package 'python3-empy'
Call Stack (most recent call first):
? /opt/ros/noetic/share/catkin/cmake/all.cmake:164 (include)
? /opt/ros/noetic/share/catkin/cmake/catkinConfig.cmake:20 (include)
? CMakeLists.txt:58 (find_package)