P4D compatability with NumPy - Followup

[UncleWael]

Hello again ,

I followed the advise given in the your reply for issue #499 . I checked the imports of all the needed packages you listed and they passed.
Then i created the following test :

1. stripped down the very same Python code of the example PyChartHTML's first tab (mpld3) : i commented out the two P4D-related lines (edge-browser) .
2. saved the new stripped code into a test.py Python modlue ,
3. then executed it from the Python command prompt. it executed successfully and displayed interactive chart in the browser (as seen in attached screenshot 1)
4. I then re-run the Delphi PyChartHTML demo, it failed again (as seen in attached screenshot 2), displaying the same error message as reported previously in issue P4D compatability with NumPy #499

the test setup (versions):

• Windows 11
• Delphi 12.1
• Python=3.12.3
• Numpy=2.2.4
• seaborn==0.13.2
• mpld3==0.5.10
• matplotlib==3.10.1
• pandas==2.2.3
• scipy==1.15.2

Whats now ?

[pyscripter]

Add to your test.py the following:

import sys
print(sys.exec_prefix)

Is it using the same python as P4D? (AppData\Roaming\Python\Python312)

• Your script fails when importing pandas.
• The only difference between test.py and the P4D script is the importing of the edge-browser
• I am pretty sure that if you run with P4D, the same code as test.py you still have the same error. (please confirm)

I cannot see how P4D is to blame for this error. P4D knows nothing about numpy, pandas or any other python module. It just runs the code using python. Also note that this code runs here fine with python 3.13, but this should not make a difference.

[UncleWael]

Hello Kiriakos,

At first , I want to emphasize that I do not mean to critique Python4Delphi , I really see it as a brilliant solution that will make me able to use the big scientific libraries of python in Delphi. i just ask to get everything working flawlessly .

I make the test you asked me to do. I've executed the test.py code inside P4D , and contrary to our expectations, it displayed that interactive graph in the external browser ! though not in the Edge browser, see the attached screenshot.

After further investigation , using your tip of print(sys.exec_prefix) , I discovered that P4D is accessing an forgotten anaconda3 installation rather than the default system's Python 3.12 .

So, I've removed the anaconda3 installation, fixed the registry key that the P4D engine accesses, and the error stopped. though, the edge_browser control do not render the html received.

To double check, I wrapped another component : TMemo to receive a copy of the html string. and I added the necessary lines in the python script, and re-run the demo. The HTML is received correctly from python, but neither Edge browser nor the TWebbrowser renders it well.

But since this is not a P4D issue, I want to thank you for your sincere help and for supporting this marvelous package Python4Delphi.

You may close this ticket.

Regards
Wael