__doc__ in compiled script

[Gabriel Genellina]

Hello

I have a script starting with a docstring. After compiling it with
compile(), is there any way I could get the docstring? __doc__ on the
code object doesn't work.
I can't use __import__ because the script has top-level statements
that have to be executed only once (it's not supposed to be used as a module).

--- begin test.py ---
body = """
"This is a docstring"

x=0
some(code).toBeExecuted("later")
"""

co = compile(body,'<string>','exec')
print co.__doc__

# what can I use for "something" below: ?
assert something(co)=="This is a docstring"
--- end test.py ---


--
Gabriel Genellina
Softlab SRL

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[Peter Otten]

Hello

I have a script starting with a docstring. After compiling it with
compile(), is there any way I could get the docstring? __doc__ on the
code object doesn't work.
I can't use __import__ because the script has top-level statements
that have to be executed only once (it's not supposed to be used as a
module).

--- begin test.py ---
body = """
"This is a docstring"

x=0
some(code).toBeExecuted("later")
"""

co = compile(body,'<string>','exec')
print co.__doc__

# what can I use for "something" below: ?
assert something(co)=="This is a docstring"
--- end test.py ---

co.co_consts[list(co.co_names).index("__doc__")]

'This is a docstring'

or probably just

co.co_consts[0]

'This is a docstring'

as I cannot imaginge the docstring to have a non-zero index.

Peter

 

[Gabriel Genellina]

I have a script starting with a docstring. After compiling it with
compile(), is there any way I could get the docstring? __doc__ on the
code object doesn't work.
I can't use __import__ because the script has top-level statements
that have to be executed only once (it's not supposed to be used as a
module).

co.co_consts[list(co.co_names).index("__doc__")]

'This is a docstring'

Good! I'll buy this one thanks!


--
Gabriel Genellina
Softlab SRL

__________________________________________________
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ¡gratis!
¡Abrí tu cuenta ya! - http://correo.yahoo.com.ar

 

[Fredrik Lundh]

co.co_consts[list(co.co_names).index("__doc__")]

'This is a docstring'

Good! I'll buy this one thanks!

however, there's no 1:1 mapping between names and constants; if you want
code that works by accident, you might as well use co_consts[0].

</F>

 

[Peter Otten]

co.co_consts[list(co.co_names).index("__doc__")]
'This is a docstring'

Good! I'll buy this one thanks!

however, there's no 1:1 mapping between names and constants; if you want
code that works by accident, you might as well use co_consts[0].

Seems like I hid the magic constant in some voodoo code. There is an
advantage over co_consts[0], though: it balks when there is no docstring.

Peter

 

[Peter Otten]

I have a script starting with a docstring. After compiling it with
compile(), is there any way I could get the docstring? __doc__ on the
code object doesn't work.

The lazy coder's approach:
.... 'the docstring'
.... print 42
.... """).doc
'the docstring'

Peter