python pyc or pyo files

[micklee74]

hi

any good websites or articles that describes about pyc or pyo files ,
how they are generated and what's the difference between them and
Java's bytecode??
thanks

 

[Fredrik Lundh]

any good websites or articles that describes about pyc or pyo files ,
how they are generated and what's the difference between them and
Java's bytecode??

they're described in the Python tutorial:

http://docs.python.org/tut/node8.html#SECTION008120000000000000000

the difference between PYC files and java byte code is that PYC files
contain Python byte code, not Java code, and that Python generates
them on the fly, without any need for an explicity compile step.

if you want Java byte code for your Python programs, use Jython.

http://www.jython.org/

</F>

 

[micklee74]

thanks !
can i ask again...
I have two scripts , A.py and B.py
In B.py, i have an import statement to import A.py
When i executed B.py, i saw a A.pyc in the same directory, but not
B.pyc ....
This is an expected behaviour right? why is B.pyc not generated?

thanks

 

[Fredrik Lundh]

This is an expected behaviour right? why is B.pyc not generated?

PYC files are only generated for modules that are imported, not for
toplevel scripts. also see:

http://pyfaq.infogami.com/how-do-i-create-a-pyc-file

</F>

 

[micklee74]

thanks! got it