MAC 10.13上的安装套件

Question

我试图安装dronekit sitl，但是当我运行sudo pip dronekit sitl命令时，我得到了这个Laptop% sudo -H pip install dronekit-sitl Requirement already satisfied: dronekit-sitl in /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages (3.2.0) Requirement already satisfied: psutil>=3.0 in /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages (from dronekit-sitl) (5.4.5) Requirement already satisfied: dronekit>=2.0.0b6 in /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages (from dronekit-sitl) (2.9.1) Requirement already satisfied: six>=1.10 in /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages (from dronekit-sitl) (1.10.0) Requirement already satisfied: pymavlink==2.0.6 in /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages (from dronekit>=2.0.0b6->dronekit-sitl) (2.0.6) Requirement already satisfied: future==0.15.2 in /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages (from dronekit>=2.0.0b6->dronekit-sitl) (0.15.2) Requirement already satisfied: monotonic==1.2 in /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages (from dronekit>=2.0.0b6->dronekit-sitl) (1.2) serial 0.0.38 has requirement future>=0.16.0, but you'll have future 0.15.2 which is incompatible.

有人能帮我解决这个问题吗？谢谢。你知道吗