Re: [ESPResSo-users] Installation problem

[Jean-Noël Grad]

Hi Shawn,

I am unable to reproduce the error message using your CMake command. 
However, I am able to reproduce it by duplicating the structure of 
/src/python/espressomd in a different folder and simply starting a 
python3 interpreter inside of it:

Fatal Python error: Py_Initialize: can't initialize sys standard streams
Traceback (most recent call last):
  File 
"/home/grad/Documents/espresso-structure/src/python/espressomd/io/__init__.py", 
line 17, in <module>
  File 
"/home/grad/Documents/espresso-structure/src/python/espressomd/io/writer/__init__.py", 
line 1, in <module>
ValueError: attempted relative import beyond top-level package
Aborted

This error shouldn't happen when using CMake because the target 
"code_info.pyx" is generated via a python script located in the 
top-level folder that is executed by a python interpreter running in the 
/build folder.

I'm currently investigating the issue with a coworker.

Best regards,
JN

On 7/15/19 7:48 PM, Shawn wrote:
> Hi Jean-Noël,
> Thanks very much for helping me. Attached please find the script of my 
> build and the cmake output. I just used the default myconfig.hpp file.
>
> Regards,
> Shawn
>
> Jean-Noël Grad <address@hidden 
> <mailto:address@hidden>> 于2019年7月15日周一 下午12:26写道：
>
>     Hi Shawn,
>
>     The 4.0.2 release is tested for both python versions. I'm not familiar
>     with this error message. It could be due to your Cython version, or to
>     an unclean build directory. To reproduce your issue, we will need the
>     cmake command you used for this build and its output in the terminal.
>     It's only 80 lines long and contains valuable information such as the
>     Cython version and espresso dependencies. If you're using a custom
>     myconfig.hpp file, please also post its content.
>
>     Best regards,
>     JN
>
>     On 7/15/19 6:58 PM, Shawn wrote:
>      > Hi everyone,
>      > I am trying install espresso 4.0.2 with python 3. The cmake command
>      > could be executed successfully, but when I tried to compile the
>     source
>      > code, I got errors below:
>      >
>      > [ 61%] Generating code_info.pyx
>      > Fatal Python error: Py_Initialize: can't initialize sys standard
>     streams
>      > Traceback (most recent call last):
>      >    File
>      >
>     "/home/shawn/sourcecode/espresso/src/python/espressomd/io/__init__.py",
>      > line 17, in <module>
>      >    File
>      >
>     
> "/home/shawn/sourcecode/espresso/src/python/espressomd/io/writer/__init__.py",
>
>      > line 17, in <module>
>      > ValueError: attempted relative import beyond top-level package
>      > /bin/sh: line 1: 15371 Aborted                 (core dumped)
>      > /home/shawn/soft/python3/bin/python3 gen_code_info.py
>      > /home/shawn/sourcecode/espresso/src/features.def
>      >
>     /home/shawn/sourcecode/espresso/build4/src/python/espressomd/code_info.pyx
>      > make[2]: *** [src/python/espressomd/code_info.pyx] Error 134
>      > make[1]: *** [src/python/espressomd/CMakeFiles/code_info.dir/all]
>     Error 2
>      > make: *** [all] Error 2
>      >
>      > It's so confusing, because I can successfully install espresso with
>      > python 2 on the same computer and I can also install espresso with
>      > python 3 on another computer.
>      >
>      > Does anyone know how to fix this? Thank you very much.
>      >
>      > Regards,
>      > Shawn