Python 3.7
I am writing a Python (3.7) code for National Instruments hardware. There is a python library for Python 2.7. There are instructions on how to convert the library to be with Python 3.
C:\Downloads\>2to3 --output-dir=PyDAQmx-1.4.1-3 -W -n PyDAQmx-1.4.1 >2to3.log 2>&1
You can inspect the log file for error and warnings.
next,build
C:\Downloads\PyDAQmx-1.4.1-3>py setup.py build >build 2>&1
and install
and install
C:\Downloads\PyDAQmx-1.4.1-3>py setup.py install >install.log 2>
&1
this should create an egg file in the Python 3 directory. And yes indeed there is a file -> PyDAQmx-1.4.1-py3.7.egg
The first time you will try to import the PyDAQmx library in Python 3 the egg file will be unzipped and you get PyDAQmx subdirectory in the site-packages folder.
C:\Python37-32\Lib\PyDAQmx-1.4.1>py
Python 3.7.0 (v3.7.0:1bf9cc5093, Jun 27 2018, 04:06:47) [MSC v.1914 32 bit (Inte
l)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import PyDAQmx
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Python37-32\Lib\PyDAQmx-1.4.1\PyDAQmx\__init__.py", line 3, in <modul
e>
import DAQmxConfig
ModuleNotFoundError: No module named 'DAQmxConfig'
>>>
there is DAQmxConfig file in a subdirectory.
why didn't it work? and is there a better protocol than what is available on the PyDAQmx website
Here is the solution:
follow the protocol posted on the webpage
Briefly,
C:\Downloads\>2to3 --output-dir=PyDAQmx-1.4.1-3 -W -n PyDAQmx-1.4.1 >2to3.log 2>&1
You can inspect the log file for error and warnings.
next, build
C:\Downloads\PyDAQmx-1.4.1-3>py setup.py build >build 2>&1
and install
if you install you indeed get an egg file but there is a corrupted file.
C:\Downloads\PyDAQmx-1.4.1-3>py setup.py install >install.log 2>
&1
the DAQmxCallBack file is corrupted
you need to go to \PyDAQmx-1.4.1-3 folder which you got after the conversion from 2 to 3 and copy the file DAQmxCallBack file from the \PyDAQmx\ subdirectory to site-packages subdirectory of Python 3 installation.
Another way would be to skip the install command and just directly copy PyDAQmx folder from \PyDAQmx-1.4.1-3 to C:\Python37-32\Lib\site-packages (or wherever you have you python3 installed)