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Availability: Unix.
The dl module defines an interface to the
dlopen() function, which is the most common interface on
Unix platforms for handling dynamically linked libraries. It allows
the program to call arbitrary functions in such a library.
Warning:
The dl module bypasses the Python type system and
error handling. If used incorrectly it may cause segmentation faults,
crashes or other incorrect behaviour.
Note:
This module will not work unless
sizeof(int) == sizeof(long) == sizeof(char *)
If this is not the case, SystemError will be raised on
import.
The dl module defines the following function:
| open( |
name[, mode = RTLD_LAZY]) |
-
Open a shared object file, and return a handle. Mode
signifies late binding (RTLD_LAZY) or immediate binding
(RTLD_NOW). Default is RTLD_LAZY. Note that some
systems do not support RTLD_NOW.
Return value is a dlobject.
The dl module defines the following constants:
- RTLD_LAZY
-
Useful as an argument to open().
- RTLD_NOW
-
Useful as an argument to open(). Note that on systems
which do not support immediate binding, this constant will not appear
in the module. For maximum portability, use hasattr() to
determine if the system supports immediate binding.
The dl module defines the following exception:
- exception error
-
Exception raised when an error has occurred inside the dynamic loading
and linking routines.
Example:
>>> import dl, time
>>> a=dl.open('/lib/libc.so.6')
>>> a.call('time'), time.time()
(929723914, 929723914.498)
This example was tried on a Debian GNU/Linux system, and is a good
example of the fact that using this module is usually a bad alternative.
Release 2.5.2, documentation updated on 21th February, 2008.
See About this document... for information on suggesting changes.
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