ModuleNotFoundError:Nomodulenamed'merlin.tradelogic'

I am having a problem with executing a script. I have a number of inherited scripts which I need to figure out how to run. Please see some background and the problem below:

The code has been transferred from an old environment (where the whole process runs fine) to a new environment. This is where the problems have started. Please see below for a cut down version of the file tree. It is a very large project so I can't post the entire tree, but hopefully this is the part that I need help with.

The uncompiled code tree:

??? dao
?   ??? cythonlib
?   ?   ??? cyrandom.c
?   ?   ??? cyrandom.cpython-35m-darwin.so
?   ?   ??? cyrandom.pxd
?   ?   ??? cyrandom.pyx
?   ?   ??? __init__.py
?   ?   ??? _random.pxd
?   ?   ??? src
?   ?       ??? _random.c
??? merlin
?   ??? cmdopt.py
?   ??? __init__.py
?   ??? instrument.py
?   ??? mktdata.py
?   ??? overview.py
?   ??? pair.py
?   ??? portfolio.py
?   ??? src
?   ?   ??? MerlinLogic.cpp
?   ?   ??? MerlinLogic.hpp
?   ??? stratconfig.py
?   ??? tradega.cpp
?   ??? tradega.cpython-35m-darwin.so
?   ??? tradega.pxd
?   ??? tradega.pyx
?   ??? tradelogic.cpp
?   ??? tradelogic.cpython-35m-darwin.so
?   ??? tradelogic.pxd
?   ??? tradelogic.pyx
?   ??? tradeopt.py
?   ??? utils.py
?   ??? var.py
?   ??? wrtconfig.py
??? merlin_cprofile.sh
??? merlin.py

The compiled tree:

strat
??? dao
?   ??? cythonlib
?   ?   ??? cyrandom.cpython-35m-x86_64-linux-gnu.so
?   ?   ??? __init__.pyc
??? merlin
?   ??? cmdopt.pyc
?   ??? __init__.pyc
?   ??? tradega.cpython-35m-x86_64-linux-gnu.so
?   ??? tradelogic.cpython-35m-x86_64-linux-gnu.so
?   ??? tradeopt.pyc
?   ??? utils.pyc
?   ??? var.pyc
?   ??? wrtconfig.pyc
??? merlin.pyc
??? merlin.sh

The merlin.pyc script is called and from there various other scripts in the merlin directory are executed.

Part of the way through the process I get the error:

Traceback (most recent call last):
  File "strats/merlin.py", line 13, in 
  File "strats/merlin/tradeopt.py", line 11, in 
ModuleNotFoundError: No module named 'merlin.tradelogic'

The new environment is running python version

[user@localhost mktdata.out]$ python --version
Python 2.7.15

Where as the old environment was running python version:

Python 3.5.3

In the new environment I am running gcc version:

[user@localhost mktdata.out]$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-redhat-linux
Configured with: ../configure --enable-bootstrap --enable-languages=c,c++,objc,obj-c++,fortran,ada,go,lto --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared --enable-threads=posix --enable-checking=release --enable-multilib --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-gcc-major-version-only --with-linker-hash-style=gnu --enable-plugin --enable-initfini-array --with-isl --enable-libmpx --enable-offload-targets=nvptx-none --without-cuda-driver --enable-gnu-indirect-function --with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
Thread model: posix
gcc version 7.3.1 20180712 (Red Hat 7.3.1-6) (GCC)  

In the new environment I am running g++ version:

[user@localhost mktdata.out]$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-redhat-linux
Configured with: ../configure --enable-bootstrap --enable-languages=c,c++,objc,obj-c++,fortran,ada,go,lto --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared --enable-threads=posix --enable-checking=release --enable-multilib --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-gcc-major-version-only --with-linker-hash-style=gnu --enable-plugin --enable-initfini-array --with-isl --enable-libmpx --enable-offload-targets=nvptx-none --without-cuda-driver --enable-gnu-indirect-function --with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
Thread model: posix
gcc version 7.3.1 20180712 (Red Hat 7.3.1-6) (GCC) 

原谅我的无知，但我需要使用Python 2.7.15重新编译的问题tradelogic.cpython-35m-darwin.so，并tradega.cpython-35m-darwin.so让我的新环境，使用Python版本（2.7.15）可以读？如果正确，我需要编译tradelogic.cpp并tradega.cpp获取两个新.so文件吗？

如果不是这种情况，我该怎么做才能解决我的问题？