Does Python interpreter have weird delay?

lugoteehalt · 10-24-2003, 05:49 AM

Trying to learn Python and sometimes something seems not to work when I run a program item through the thing you get when you type 'Python' at the command line. But the next time the same thing is tried it works.

This is not due to not stopping and restarting the said Python thing.

Does it sometimes not update the testprogram.pyc binary thing even though testprogram.py has changed; or something like that.

This suspicion of the thing is very destabilising if you are trying to learn.

Thanks any help.

jim mcnamara · 11-06-2003, 07:59 PM

It doesn't automatically update the binary pyc file.

There are things you can import like java or oracle that take forever to get loaded. They are actually stored in shared libraries, so depnding on where the library is in your path, and how many dpedencies there are, life can slow.

Our Jython apps (python running java) take about thirty seconds to start on an HP box with 24 cpus that is at least 100 times faster than any PC.

lugoteehalt · 11-07-2003, 04:34 AM

Thanks.

I take it then I am not imagining things when the same program, which had previously given errors, runs .

jim mcnamara · 11-07-2003, 09:28 AM

import failures or shared library problems are PATH problems, not code problems.

The other thing - whenever you want python code to be run by different users or on different machines always try to use just standard classes, and make sure everybody's PATH starts out pointing to the same directories. Anything else is a formula for disaster.

lugoteehalt · 11-12-2003, 01:43 PM

Thanks your help. Will have to dwell on it