I am currently working on a piece of python code integrated with c++ on an open source platform. Python classes and definitions pass arguments to c++ files and the function runs thereby. My c++ file is a packet_sink file which takes 3 input arguments that are mentioned below :
packet_sink (const std::vector<unsigned char>& sync_vector,
msg_queue_sptr target_queue, int threshold)
The partial piece of python code is as follows :
self.threshold = -1
if access_code is None:
code = tuple(string_to_1_0_list(default_access_code))
access_code = to_1_0_string(code)
if not packet_utils.is_1_0_string(access_code):
raise ValueError, "Invalid access_code %r. Must be string of 1's and 0's" % (access_code,)
print " _access_code : %s " %(self._access_code,)
self._msgq = gr.msg_queue()# holds packets fromthe PHY
self.phy_anay_demod= phy_anay_demod(self,*args, **kwargs)
self._packet_sink =gr.packet_sink(self._access_code,self._msgq,self.threshold)
The value of _access_code is:
0011010110111011001001010100011101001111001100010000010000111111
But the error message that i am receiving is as follows :
TypeError: in method 'packet_sink', argument 1 of type 'std::vector< unsigned char,std::allocator< unsigned char > > const &'.
Could anybody please help me understand the error if not a resolution to the problem.
It looks to me like self._access_code should be a list or tuple of integers which are either 0 or 1.
Gnuradio uses SWIG to create the python interface from the C++ code. SWIG will map a C++ vector to a python list. So if you pass in a list of integers (0 or 1) this should happily be converted to vector.
My guess is that your self._access_code is a string and you need to apply the function string_to_1_0_list to it.