Convert matlab code to python package, but encountered error on xcb when running.

Hi everyone,

I have converted a piece of matlab code into a python package, following the instruction on https://www.mathworks.com/help/compiler_sdk/gs/create-a-python-application-with-matlab-code.html.

After that the package can be imported in python code. But when the actual function converted from matlab is called, the program will crash, with following error message:

python: <unknown>:0: <unknown>: Assertion `This application failed to start because it could not find or load the Qt platform plugin "xcb".

Available platform plugins are: linuxfb, minimal, offscreen, xcb.

Reinstalling the application may fix this problem.' failed.

------------------------------------------------------------------------
             Assertion detected at Mon Mar 19 13:37:55 2018
------------------------------------------------------------------------

Configuration:
  Crash Decoding      : Disabled - No sandbox or build area path
  Crash Mode          : continue (default)
  Current Graphics Driver: Unknown hardware 
  Current Visual      : 0xad (class 4, depth 24)
  Default Encoding    : UTF-8
  Deployed            : true
  GNU C Library       : 2.23 stable
  Host Name           : bmw
  MATLAB Architecture : glnxa64
  MATLAB Entitlement ID: Unknown
  MATLAB Root         : /usr/local/MATLAB/R2017B
  MATLAB Version      : 9.3.0.713579 (R2017b)
  OpenGL              : hardware
  Operating System    : Linux 4.13.0-36-generic #40~16.04.1-Ubuntu SMP Fri Feb 16 23:25:58 UTC 2018 x86_64
  Processor ID        : x86 Family 6 Model 79 Stepping 1, GenuineIntel
  Virtual Machine     : Java 1.8.0_121-b13 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
  Window System       : The X.Org Foundation (70000000), display :56.0

I am appreciated if someone can give me advice to resolve this problem. I am using the following environment:

• Ubuntu 16.04
• matlab 2017b
• python 3.5