导入错误：尽管已安装，但没有名为 future 的模块

如何解决导入错误：尽管已安装，但没有名为 future 的模块

catkin build 失败，原因是

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",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

尽管安装了未来。

$ 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

我开始认为这可能是路径采购问题！？我使用的是 Ubuntu 18.04 LTS。

解决方法

我无法添加评论，所以我走了。

1. 您可能使用了错误版本的 python，请尝试使用更新或旧版本

2. 模块可能在错误的文件中

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