Rami Chowdhury, 29.06.2010 20:56:
On Tuesday 29 June 2010 05:24:26 Zohair M. Abu Shaban wrote:
From: rami.chowdh...@gmail.com
On Monday 28 June 2010 12:46:13 Zohair M. Abu Shaban wrote:
I have this python function defined as:
def set_time_at_next_pps(self, *args, **kwargs):
"""set_time_at_next_pps(self, usrp2::time_spec_t time_spec)
-> bool"""
it was generated to do the same function as the c++:
"Generated" by what?
set_time_at_next_pps(usrp2::time_spec_t(0, 0))
I am new to python and don't know hoe to use this python syntax.
Any hint or help please?
Can you give us a little more information? What do you need to use it
for?
I am using hardware that uses some libraries on Linux.
>>
>> def set_time_at_next_pps(*args, **kwargs):
"""set_time_at_next_pps(self, usrp2::time_spec_t time_spec) ->
bool
>> """
>> return _usrp2.usrp2_base_set_time_at_next_pps(*args, **kwargs)
This is actually a definition of a function in C++ transformed to python.
It receives a structure parameter and returns boolean the structure is
defined like this: in a library called libusrp2.so and the header file is
usrp2.h
typedef struct time_spec{
uint32_t secs;
uint32_t ticks;
time_spec(void){
secs = ~0;
ticks = ~0;
}
time_spec(uint32_t new_secs, uint32_t new_ticks = 0){
secs = new_secs;
ticks = new_ticks;
}
} time_spec_t;
in my python code I wrote:
zeroise=usrp2.time_spec_t(0,0)
self.$(id).set_time_at_next_pps(zeroise)
The error Iam receiveing is :
zeroise=usrp2.time_spec_t(0,0)
AttributeError: 'module' object has no attribute 'time_spec_t'
What is "usrp2"? The "generated" module?
Thank you for the details. Could you let me know how you're accessing the C++
code? Are you using ctypes? Are you using a Python extension module that wraps
the C++ code? Some other method?
These are the right questions.
MY PROBLEM THAT I NEED HELP FOR IS:
1- Am I using the structure correctly?
2- Am I invoking the python definition correctly?
I'd guess not, since you're getting an error ;-)
Try "dir(usrp2)" or "help(usrp2)", that will tell you what the module provides.
If you're after wrapping the library yourself, take a look at ctypes and
Cython. Depending on the requirements, either of the two is a good choice.
Stefan
--
http://mail.python.org/mailman/listinfo/python-list
