Embedding python code into text document question.

[Thomas Troeger]

Dear all,

I've written a program that parses a string or file for embedded python
commands, executes them and fills in the returned value. The input might
look like this:

process id: $$return os.getpid()$$
current date: $$return time.ctime()$$
superuser: $$
if os.geteuid():
return "Yes"
else:
return "No"$$

I've tried several solutions using eval, execfile or compile, but none
of those would solve my problem. Does anyone have a solution that works?
Any suggestions? Any help will be appreciated :)

Regards,
Thomas.

[grflanagan]

On Jan 10, 2:10 pm, Thomas Troeger <[e-mail]>
wrote:

Dear all,

I've written a program that parses a string or file for embedded python
commands, executes them and fills in the returned value. The input might
look like this:

process id: $$return os.getpid()$$
current date: $$return time.ctime()$$
superuser: $$
if os.geteuid():
return "Yes"
else:
return "No"$$

I've tried several solutions using eval, execfile or compile, but none
of those would solve my problem. Does anyone have a solution that works?
Any suggestions? Any help will be appreciated :)

AST visitor approach:

http://aspn.activestate.com/ASPN/Coo.../Recipe/440629

[Marc 'BlackJack' Rintsch]

On Thu, 10 Jan 2008 14:10:05 +0100, Thomas Troeger wrote:

I've written a program that parses a string or file for embedded python
commands, executes them and fills in the returned value. The input might
look like this:

process id: $$return os.getpid()$$
current date: $$return time.ctime()$$
superuser: $$
if os.geteuid():
return "Yes"
else:
return "No"$$

I've tried several solutions using eval, execfile or compile, but none
of those would solve my problem. Does anyone have a solution that works?
Any suggestions? Any help will be appreciated :)

My suggestion would be: use one of the many already existing templating
systems.

Ciao,
Marc 'BlackJack' Rintsch

[MRAB]

On Jan 10, 1:10 pm, Thomas Troeger <[e-mail]>
wrote:

Dear all,

I've written a program that parses a string or file for embedded python
commands, executes them and fills in the returned value. The input might
look like this:

process id: $$return os.getpid()$$
current date: $$return time.ctime()$$
superuser: $$
if os.geteuid():
return "Yes"
else:
return "No"$$

I've tried several solutions using eval, execfile or compile, but none
of those would solve my problem. Does anyone have a solution that works?
Any suggestions? Any help will be appreciated :)

You could wrap the bits of code in a def statement and then exec it:

>>print field

return os.getpid()

>>exec("def field_func():\n" + "".join(" %s\n" % line for line in field.splitlines()))
print field_func()

3904

[Erik Max Francis]

Thomas Troeger wrote:

I've written a program that parses a string or file for embedded python
commands, executes them and fills in the returned value. The input might
look like this:

process id: $$return os.getpid()$$
current date: $$return time.ctime()$$
superuser: $$
if os.geteuid():
return "Yes"
else:
return "No"$$

I've tried several solutions using eval, execfile or compile, but none
of those would solve my problem. Does anyone have a solution that works?
Any suggestions? Any help will be appreciated :)

What you're looking for is a templating system for Python. There are
already many with varying degrees of complexity and emphasis, including
one I've put together, EmPy:

http://www.alcyone.com/software/empy/

For more, google around for Python templating.

--
Erik Max Francis && ma*@alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 18 N 121 57 W && AIM, Y!M erikmaxfrancis
If the sun comes up / And you're not home / I'll be strong
-- India Arie

[Thomas Troeger]

Thanks guys, you've helped me very much :) Cheers & happy new year!