__init__.py

#
# Copyright 2010-2012 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
#

'''
Provides source and sink blocks to interface with the UHD library.
Used to send and receive data between the Ettus Research, LLC product
line.
'''

########################################################################
# Prepare uhd swig module to make it more pythonic
########################################################################


def _prepare_uhd_python():
    try:
        from . import uhd_python
    except ImportError:
        import os
        dirname, filename = os.path.split(os.path.abspath(__file__))
        __path__.append(os.path.join(dirname, "bindings"))
        from . import uhd_python

    # some useful typedefs for the user
    setattr(uhd_python, 'freq_range_t', uhd_python.meta_range_t)
    setattr(uhd_python, 'gain_range_t', uhd_python.meta_range_t)

    # Make the python tune request object inherit from float
    # so that it can be passed in GRC as a frequency parameter.
    # The type checking in GRC will accept the tune request.
    # Also use kwargs to construct individual struct elements.
    class tune_request_t(uhd_python.tune_request_t):
        # def __new__(self, *args, **kwargs): return float.__new__(self)
        def __float__(self): return self.target_freq

        def __init__(self, *args, **kwargs):
            super().__init__(*args)
            for key, val in list(kwargs.items()):
                setattr(self, key, val)
    setattr(uhd_python, 'tune_request_t', tune_request_t)

    # handle general things on all uhd_python attributes
    # Install the __str__ and __repr__ handlers if applicable
    # Create aliases for uhd swig attributes to avoid the "_t"
    for attr in dir(uhd_python):
        myobj = getattr(uhd_python, attr)
        if hasattr(myobj, 'to_string'):
            myobj.__repr__ = lambda o: o.to_string().strip()
        if hasattr(myobj, 'to_pp_string'):
            myobj.__str__ = lambda o: o.to_pp_string().strip()
        if hasattr(myobj, 'to_bool'):
            myobj.__nonzero__ = lambda o: o.to_bool()
        if hasattr(myobj, 'to_int'):
            myobj.__int__ = lambda o: o.to_int()
        if hasattr(myobj, 'to_real'):
            myobj.__float__ = lambda o: o.to_real()
        if attr.endswith('_t'):
            setattr(uhd_python, attr[:-2], myobj)

    # make a new find devices that casts everything with the pythonized device_addr_t which has __str__
    def find_devices(*args, **kwargs):
        def to_pythonized_dev_addr(dev_addr):
            new_dev_addr = uhd_python.device_addr_t()
            for key in list(dev_addr.keys()):
                new_dev_addr[key] = dev_addr.get(key)
            return new_dev_addr
        return __builtins__['map'](to_pythonized_dev_addr, uhd_python.find_devices_raw(*args, **kwargs))
    setattr(uhd_python, 'find_devices', find_devices)


########################################################################
# Initialize this module with the contents of uhd pybind
########################################################################
_prepare_uhd_python()

from .uhd_python import *