ImportError：尽管安装了名为future的模块，但没有该模块

Question

由于以下原因，catkin build失败

Errors     << mavlink:make /home/eia-lab1/catkin_ws/logs/mavlink/build.make.005.log
Traceback (most recent call last):
  File "/home/eia-lab1/catkin_ws/src/mavlink/pymavlink/tools/mavgen.py", line 16, in <module>
    from pymavlink.generator import mavgen
  File "/home/eia-lab1/catkin_ws/src/mavlink/pymavlink/generator/mavgen.py", line 26, in <module>
    from future import standard_library
ImportError: No module named future
make[2]: *** [paparazzi-v2.0-cxx-stamp] Error 1
make[1]: *** [CMakeFiles/paparazzi.xml-v2.0.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
Traceback (most recent call last):
  File "/home/eia-lab1/catkin_ws/src/mavlink/pymavlink/tools/mavgen.py", line 16, in <module>
    from pymavlink.generator import mavgen
  File "/home/eia-lab1/catkin_ws/src/mavlink/pymavlink/generator/mavgen.py", line 26, in <module>
    from future import standard_library
ImportError: No module named future
make[2]: *** [matrixpilot-v2.0-cxx-stamp] Error 1
make[1]: *** [CMakeFiles/matrixpilot.xml-v2.0.dir/all] Error 2
make: *** [all] Error 2

尽管安装了future。

$ pip list | grep fut
future                        0.18.2

我已经尝试了以下方法：

$ pip install -U future 
Defaulting to user installation because normal site-packages is not writeable
Requirement already satisfied: future in /home/eia-lab1/.local/lib/python3.6/site-packages (0.18.2)

$ sudo -H pip install future
Requirement already satisfied: future in /usr/lib/python3/dist-packages (0.15.2)

$ python3 -m pip install future
Defaulting to user installation because normal site-packages is not writeable
Requirement already satisfied: future in /home/eia-lab1/.local/lib/python3.6/site-packages (0.18.2)

$ pip install future
Defaulting to user installation because normal site-packages is not writeable
Requirement already satisfied: future in /home/eia-lab1/.local/lib/python3.6/site-packages (0.18.2)

$ pip3 install future
Defaulting to user installation because normal site-packages is not writeable
Requirement already satisfied: future in /home/eia-lab1/.local/lib/python3.6/site-packages (0.18.2)

资源：

• No module named future
• https://github.com/ArduPilot/pymavlink/issues/25

我开始想这可能是一个路径寻源问题！？我使用的是Ubuntu18.04LTS

Answer 1

我不能添加评论，所以我来了

1. 您可能使用了错误的python版本，请尝试使用较新或较旧的版本

2. 模块可能位于错误的文件中

这是我看到的唯一两件事，因为您已经尝试了各种安装方法