Dear all,
I am trying to embed python into another scripting language, to do this
I need to solve a number of problems on importing or compiling python
script. First let me state what exactly I want to do, that is, I want
the following syntax to be supported in the host language which I am
developing:
######################################################
# scripts in the host language
routine Test()
do
println("printed by Test()");
end
global astring = "ASTRING";
# begin python scripts:
@begin(python)
def PyTest( s ):
print s
return 1000;
# access global variables from the host scripts
pystring = astring;
# call function defined in the host script:
Test();
@end(python)
# call a python function:
n = PyTest( "invoke python function" );
######################################################
So there are the following problems come out naturally:
#1. can I compile a block of python script to get the list of
variables, classes and functions etc. (or at least the names) without
executing?
Because I need the host script to see the python definitions.
The Py_CompileStringFlags() seems to do the work. But it returns a code
object, which I don't know exactly and if it is possible to get the
list of variables, classes and functions from this kind of object.
##2. Can I pass a list global variables for such compiling?
Because I need python scripts also see the variables functions etc.
defined in the host scripts.
*********
For these two problem, a C API like this would be pefect:
PyObject* Py_CompileStringFlagsXXX( const char *str, const char *file,
int start, PyObject *module, PyCompilerFlags *flags );
Different from Py_CompileStringFlags(), this function should take
another parameter (Python module object), which serve as a
**namespace**, to solve undefined names in the souce "str", and store
global variables, functions and classes etc defined in this source
string.
So the third question is:
###3. Is there some way, or how to do such thing as
Py_CompileStringFlagsXXX() would do???
Of course, I do not expect such API should be added soon or even added.
Thanks a lot,
Limin
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