How to (successfully) switch between Python 3.6 64 and 32 bit on spyder (anaconda)

[Chentir MT]

(I posted this question on stack overflow but I hope being more lucky here)

I am having hard time to effectively switch between 64bit Python and 32bit.

1- I followed steps described here (Using multiple Python engines (32Bit/64bit and 2.7/3.5))

2- I successfully got a 2nd channel Python 3.6 32bit on my Anaconda Navigator

3- When I start Spyder, it is still running on 64bit interpreter

4- I forced the interpreter to launch the 32bit from: "Tools-->Python Interpreter-->Use the following Interpreter" then I navigate to the 32bit python.exe file created by the 2nd channel

Yet it is still running on 64bit (I confirmed on spyder menu Help --> About Spyder... as well as by typing python in anaconda prompt)

I need the 32bit python to call some DLLs using ctypes. If I don't do that I get the following error message:

OSError: [WinError 193] %1 is not a valid Win32 application

I tried to load a different DLL (64bit) and I didn't have any issues

If using pythonnet (clr), I am getting this error message:

FileNotFoundException: Unable to find assembly

Note: this post (PythonNet FileNotFoundException: Unable to find assembly) reported similar issue using clr, but I can't find: Properties-->General-->Unblock

Thanks for your help

[vikhyat kumeria]

Hi sir,

Thanks a lot for your help

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