Using Python with PARI/GP questions

[hermann@stamm-wilbrandt.de]

Five days ago I published my first challenge with price money (100 USD):
https://github.com/Hermann-SW/RSA_numbers_factored/tree/main/1_sum_of_2_sqs_semiprime

To make it impossible for me to know the random seed used,
I used Python time.time_ns(), epoch time at nanosecond resolution.

To make it impossible for everyone else, I did input a long
factor with stdiomask.getpass() that was used as well.

pi@raspberrypi5:~/RSA_numbers_factored/1_sum_of_2_sqs_semiprime $ 
./challenge.py
factor: ****************************************************
1
1
4675966568241743081873479921415404781226665419569548210315782648657034701192057386949090276633929520980704940531187630512099300307
15512340356624619735725710103759797813121190798562361321728468720849205060936899989010233224533248153329173333001037083787589728422
262497366687079298365523922947227261835640624571224693166902778465021817904092516082216927109476590103573107044406347695971527079161864485154522005142837118124732638711372016122621735436807398062028290119971297328351792353815685809546983240652624562758684904333
261 decimal digits semiprime
pi@raspberrypi5:~/RSA_numbers_factored/1_sum_of_2_sqs_semiprime $


Questions:

A)
GP has (clear text) input(). Is GP equivalent of Python 
stdiomask.getpass() that outputs asterisks instead of typed characters 
available?

B)
getabstime/gettime/getwalltime return milliseconds. Is there a GP option 
with more resolution like Python time.time_ns?

C)
If having to use Python for asterisk input with PARI/GP for computation, 
what is better?
1) call PARI/GP script from Python with os.system() and pass information 
via environment variable (which I did)
2) call Python using extern() or externstr() from PARI/GP


Regards,

Hermann.