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Cannot use Winpdb (or PyDev) to trace embedded Python script in

I am embedding Python in a MSVC++ (2005) application. The application
creates some environment and then launches a Python script that will
call some functions exported from the MSVC++ application.

I want to be able to debug the Python script by using a debug server,
like Winpdb (winpdb.org).

I use ActivePython 2.5.2.2, Microsoft Visual Studio 2005, and Winpdb
1.3.8.

When I launch a script like "e:>python test.py" everything is O'K and
I can use Winpdb to trace/debug.

When I run the same script from the MSVC++ application, there is
always a complain "ImportError: No module named _socket".

Here is the basic test script I use:
>>>
def Process( something ):
print "\n\nStarted debugging\n=================\n"
#pydevd.settrace()
import rpdb2; rpdb2.start_embedded_debugger("1")
print "\n\nStopped debugging\n=================\n"

if __name__ == '__main__':
Process( "test" )
<<<

In the MSVC++ application I tried many approaches, as suggested by
many people, and all of them work to launch the script, but none of
them works with Winpdb (or PyDev for Eclipse - same problem). Just for
completeness - here is one:
>>>
PyRun_SimpleString("import sys");
PyRun_SimpleString("import os");
PyRun_SimpleString( "fullpath = os.path.abspath(\"E:/Test.py\")" );
PyRun_SimpleString( "g = globals().copy()" );
PyRun_SimpleString( "g['__file__'] = fullpath");
PyRun_SimpleString( "execfile(fullpath, g) ");
<<<

If I use pdb (import pdb + pdb.runcall(something) ) everything works
fine, but I need the performance and convinience of Winpdb.

What am I doing wrong?

Your help is highly appreciated!

Best regards,
Chris
Jun 27 '08 #1
4 2800
Nir
You seem to be having a problem with the import path of the embedded
interpreter. I suppose the embedded interpreter includes some modules
in a particular folder and _socket is not one of them. For the sake of
debugging try adding the c:\python25\lib path to the sys.path variable
of the interpreter before attempting to import rpdb2.

Does this work?

Nir
On Jun 5, 2:52 pm, Chris8B...@gmail.com wrote:
I am embedding Python in a MSVC++ (2005) application. The application
creates some environment and then launches a Python script that will
call some functions exported from the MSVC++ application.

I want to be able to debug the Python script by using a debug server,
likeWinpdb(winpdb.org).

I use ActivePython 2.5.2.2, Microsoft Visual Studio 2005, andWinpdb
1.3.8.

When I launch a script like "e:>python test.py" everything is O'K and
I can useWinpdbto trace/debug.

When I run the same script from the MSVC++ application, there is
always a complain "ImportError: No module named _socket".

Here is the basic test script I use:

def Process( something ):
print "\n\nStarted debugging\n=================\n"
#pydevd.settrace()
import rpdb2; rpdb2.start_embedded_debugger("1")
print "\n\nStopped debugging\n=================\n"

if __name__ == '__main__':
Process( "test" )
<<<

In the MSVC++ application I tried many approaches, as suggested by
many people, and all of them work to launch the script, but none of
them works withWinpdb(or PyDev for Eclipse - same problem). Just for
completeness - here is one:

PyRun_SimpleString("import sys");
PyRun_SimpleString("import os");
PyRun_SimpleString( "fullpath = os.path.abspath(\"E:/Test.py\")" );
PyRun_SimpleString( "g = globals().copy()" );
PyRun_SimpleString( "g['__file__'] = fullpath");
PyRun_SimpleString( "execfile(fullpath, g) ");
<<<

If I use pdb (import pdb + pdb.runcall(something) ) everything works
fine, but I need the performance and convinience ofWinpdb.

What am I doing wrong?

Your help is highly appreciated!

Best regards,
Chris
Jun 27 '08 #2
On Jun 6, 1:13 am, Nir <nir1...@gmail.comwrote:
You seem to be having a problem with the import path of the embedded
interpreter. I suppose the embedded interpreter includes some modules
in a particular folder and _socket is not one of them. For the sake of
debugging try adding the c:\python25\lib path to the sys.path variable
of the interpreter before attempting to import rpdb2.

Does this work?

Nir

On Jun 5, 2:52 pm, Chris8B...@gmail.com wrote:
I am embedding Python in a MSVC++ (2005) application. The application
creates some environment and then launches a Python script that will
call some functions exported from the MSVC++ application.
I want to be able to debug the Python script by using a debug server,
likeWinpdb(winpdb.org).
I use ActivePython 2.5.2.2, Microsoft Visual Studio 2005, andWinpdb
1.3.8.
When I launch a script like "e:>python test.py" everything is O'K and
I can useWinpdbto trace/debug.
When I run the same script from the MSVC++ application, there is
always a complain "ImportError: No module named _socket".
Here is the basic test script I use:
def Process( something ):
print "\n\nStarted debugging\n=================\n"
#pydevd.settrace()
import rpdb2; rpdb2.start_embedded_debugger("1")
print "\n\nStopped debugging\n=================\n"
if __name__ == '__main__':
Process( "test" )
<<<
In the MSVC++ application I tried many approaches, as suggested by
many people, and all of them work to launch the script, but none of
them works withWinpdb(or PyDev for Eclipse - same problem). Just for
completeness - here is one:
PyRun_SimpleString("import sys");
PyRun_SimpleString("import os");
PyRun_SimpleString( "fullpath = os.path.abspath(\"E:/Test.py\")" );
PyRun_SimpleString( "g = globals().copy()" );
PyRun_SimpleString( "g['__file__'] = fullpath");
PyRun_SimpleString( "execfile(fullpath, g) ");
<<<
If I use pdb (import pdb + pdb.runcall(something) ) everything works
fine, but I need the performance and convinience ofWinpdb.
What am I doing wrong?
Your help is highly appreciated!
Best regards,
Chris
Nir,
Does this work?
Unfortunately, not.

I did some experiments to check the sys.path hypothesis:

- In my MSVC++ application I did PyRun_SimpleString("import cgi"); -
it complained about missing _socket.

- Did PyRun_SimpleString("print sys.path") to get the sys.path as seen
from within the application environment (that does not find _socket)

- Did the same in "test.py" and ran ...>Python test.py to get the
sys.path for the environment that _does_ find _socket

- Compared the two - the working environment had two more paths:

C:\\WINDOWS\\system32\\python25.zip
C:\\Python25\\lib\\plat-win

- Added the missing path to the embedded environment:

PyRun_SimpleString("import sys");
PyRun_SimpleString("import os");

PyRun_SimpleString("sys.path.append(\"C:\\WINDOWS\ \system32\
\python25.zip\")");
PyRun_SimpleString("sys.path.append(\"C:\\Python25 \\lib\\plat-win
\")");

PyRun_SimpleString("print sys.path");

PyRun_SimpleString("import cgi");

Not all paths that are in the working environment are present in the
embedded environment, but still there is a problem:

Traceback (most recent call last):
File "<string>", line 1, in <module>
File "C:\Python25\Lib\cgi.py", line 40, in <module>
import urllib
File "c:\Python25\lib\urllib.py", line 26, in <module>
import socket
File "c:\Python25\lib\socket.py", line 45, in <module>
import _socket
ImportError: No module named _socket

Chris

Jun 27 '08 #3
On Jun 6, 11:25 am, Chris8B...@gmail.com wrote:
On Jun 6, 1:13 am, Nir <nir1...@gmail.comwrote:
You seem to be having a problem with the import path of the embedded
interpreter. I suppose the embedded interpreter includes some modules
in a particular folder and _socket is not one of them. For the sake of
debugging try adding the c:\python25\lib path to the sys.path variable
of the interpreter before attempting to import rpdb2.
Does this work?
Nir
On Jun 5, 2:52 pm, Chris8B...@gmail.com wrote:
I am embedding Python in a MSVC++ (2005) application. The application
creates some environment and then launches a Python script that will
call some functions exported from the MSVC++ application.
I want to be able to debug the Python script by using a debug server,
likeWinpdb(winpdb.org).
I use ActivePython 2.5.2.2, Microsoft Visual Studio 2005, andWinpdb
1.3.8.
When I launch a script like "e:>python test.py" everything is O'K and
I can useWinpdbto trace/debug.
When I run the same script from the MSVC++ application, there is
always a complain "ImportError: No module named _socket".
Here is the basic test script I use:
def Process( something ):
print "\n\nStarted debugging\n=================\n"
#pydevd.settrace()
import rpdb2; rpdb2.start_embedded_debugger("1")
print "\n\nStopped debugging\n=================\n"
if __name__ == '__main__':
Process( "test" )
<<<
In the MSVC++ application I tried many approaches, as suggested by
many people, and all of them work to launch the script, but none of
them works withWinpdb(or PyDev for Eclipse - same problem). Just for
completeness - here is one:
PyRun_SimpleString("import sys");
PyRun_SimpleString("import os");
PyRun_SimpleString( "fullpath = os.path.abspath(\"E:/Test.py\")" );
PyRun_SimpleString( "g = globals().copy()" );
PyRun_SimpleString( "g['__file__'] = fullpath");
PyRun_SimpleString( "execfile(fullpath, g) ");
<<<
If I use pdb (import pdb + pdb.runcall(something) ) everything works
fine, but I need the performance and convinience ofWinpdb.
What am I doing wrong?
Your help is highly appreciated!
Best regards,
Chris

Nir,
Does this work?

Unfortunately, not.

I did some experiments to check the sys.path hypothesis:

- In my MSVC++ application I did PyRun_SimpleString("import cgi"); -
it complained about missing _socket.

- Did PyRun_SimpleString("print sys.path") to get the sys.path as seen
from within the application environment (that does not find _socket)

- Did the same in "test.py" and ran ...>Python test.py to get the
sys.path for the environment that _does_ find _socket

- Compared the two - the working environment had two more paths:

C:\\WINDOWS\\system32\\python25.zip
C:\\Python25\\lib\\plat-win

- Added the missing path to the embedded environment:

PyRun_SimpleString("import sys");
PyRun_SimpleString("import os");

PyRun_SimpleString("sys.path.append(\"C:\\WINDOWS\ \system32\
\python25.zip\")");
PyRun_SimpleString("sys.path.append(\"C:\\Python25 \\lib\\plat-win
\")");

PyRun_SimpleString("print sys.path");

PyRun_SimpleString("import cgi");

Not all paths that are in the working environment are present in the
embedded environment, but still there is a problem:

Traceback (most recent call last):
File "<string>", line 1, in <module>
File "C:\Python25\Lib\cgi.py", line 40, in <module>
import urllib
File "c:\Python25\lib\urllib.py", line 26, in <module>
import socket
File "c:\Python25\lib\socket.py", line 45, in <module>
import _socket
ImportError: No module named _socket

Chris
There is a typo:

"Not all paths that are in the working environment are present in the
embedded environment, but still there is a problem:"

should read

"Now all paths...."

Sorry!

Chirs
Jun 27 '08 #4
Nir
Can you check another hypothesis?

I currently do not have a Python installation to verify this but if my
memory does not fail me there is a DLL library somewhere under c:
\python25 and _socket might be there as well. Copy any DLLs you find
there to the same folder as your embedded interpreter DLL and see if
the problem is resolved.

Nir
On Jun 6, 11:25 am, Chris8B...@gmail.com wrote:
On Jun 6, 1:13 am, Nir <nir1...@gmail.comwrote:
You seem to be having a problem with the import path of the embedded
interpreter. I suppose the embedded interpreter includes some modules
in a particular folder and _socket is not one of them. For the sake of
debugging try adding the c:\python25\lib path to the sys.path variable
of the interpreter before attempting to import rpdb2.
Does this work?
Nir
On Jun 5, 2:52 pm, Chris8B...@gmail.com wrote:
I am embedding Python in a MSVC++ (2005) application. The application
creates some environment and then launches a Python script that will
call some functions exported from the MSVC++ application.
I want to be able to debug the Python script by using a debug server,
likeWinpdb(winpdb.org).
I use ActivePython 2.5.2.2, Microsoft Visual Studio 2005, andWinpdb
1.3.8.
When I launch a script like "e:>python test.py" everything is O'K and
I can useWinpdbto trace/debug.
When I run the same script from the MSVC++ application, there is
always a complain "ImportError: No module named _socket".
Here is the basic test script I use:
def Process( something ):
print "\n\nStarted debugging\n=================\n"
#pydevd.settrace()
import rpdb2; rpdb2.start_embedded_debugger("1")
print "\n\nStopped debugging\n=================\n"
if __name__ == '__main__':
Process( "test" )
<<<
In the MSVC++ application I tried many approaches, as suggested by
many people, and all of them work to launch the script, but none of
them works withWinpdb(or PyDev for Eclipse - same problem). Just for
completeness - here is one:
PyRun_SimpleString("import sys");
PyRun_SimpleString("import os");
PyRun_SimpleString( "fullpath = os.path.abspath(\"E:/Test.py\")" );
PyRun_SimpleString( "g = globals().copy()" );
PyRun_SimpleString( "g['__file__'] = fullpath");
PyRun_SimpleString( "execfile(fullpath, g) ");
<<<
If I use pdb (import pdb + pdb.runcall(something) ) everything works
fine, but I need the performance and convinience ofWinpdb.
What am I doing wrong?
Your help is highly appreciated!
Best regards,
Chris

Nir,
Does this work?

Unfortunately, not.

I did some experiments to check the sys.path hypothesis:

- In my MSVC++ application I did PyRun_SimpleString("import cgi"); -
it complained about missing _socket.

- Did PyRun_SimpleString("print sys.path") to get the sys.path as seen
from within the application environment (that does not find _socket)

- Did the same in "test.py" and ran ...>Python test.py to get the
sys.path for the environment that _does_ find _socket

- Compared the two - the working environment had two more paths:

C:\\WINDOWS\\system32\\python25.zip
C:\\Python25\\lib\\plat-win

- Added the missing path to the embedded environment:

PyRun_SimpleString("import sys");
PyRun_SimpleString("import os");

PyRun_SimpleString("sys.path.append(\"C:\\WINDOWS\ \system32\
\python25.zip\")");
PyRun_SimpleString("sys.path.append(\"C:\\Python25 \\lib\\plat-win
\")");

PyRun_SimpleString("print sys.path");

PyRun_SimpleString("import cgi");

Not all paths that are in the working environment are present in the
embedded environment, but still there is a problem:

Traceback (most recent call last):
File "<string>", line 1, in <module>
File "C:\Python25\Lib\cgi.py", line 40, in <module>
import urllib
File "c:\Python25\lib\urllib.py", line 26, in <module>
import socket
File "c:\Python25\lib\socket.py", line 45, in <module>
import _socket
ImportError: No module named _socket

Chris
Jun 27 '08 #5

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