Source code for cocotb.generators

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"""
    Set of general generic generators
"""
import math
import random
import itertools
import warnings

from cocotb.decorators import public


warnings.warn(
    "The contents of the cocotb.generators package will soon be removed.\n"
    "Most of the functionality can be replaced with utilities provided "
    "by other packages or the standard library.\n Alternatively, you can "
    "copy this package or individual functions into your project, if you "
    "follow cocotb's license agreement.",
    DeprecationWarning)


[docs]@public def repeat(obj, nrepeat=None): """Generator to repeatedly yield the same object Args: obj (any): The object to yield nrepeat (int, optional): The number of times to repeatedly yield *obj* .. deprecated:: 1.4.1 """ if nrepeat is None: return itertools.repeat(obj) else: return itertools.repeat(obj, times=nrepeat)
[docs]@public def combine(generators): """ Generator for serially combining multiple generators together Args: generators (iterable): Generators to combine together .. deprecated:: 1.4.1 """ return itertools.chain.from_iterable(generators)
[docs]@public def gaussian(mean, sigma): """ Generate a Gaussian distribution indefinitely Args: mean (int/float): mean value sigma (int/float): Standard deviation .. deprecated:: 1.4.1 """ while True: yield random.gauss(mean, sigma)
[docs]@public def sine_wave(amplitude, w, offset=0): """ Generates a sine wave that repeats forever Args: amplitude (int/float): peak deviation of the function from zero w (int/float): is the rate of change of the function argument Yields: floats that form a sine wave .. deprecated:: 1.4.1 """ twoPiF_DIV_sampleRate = math.pi * 2 while True: for idx in (i / float(w) for i in range(int(w))): yield amplitude*math.sin(twoPiF_DIV_sampleRate * idx) + offset
def get_generators(module): """Return an iterator which yields all the generators in a module Args: module (python module): The module to get the generators from .. deprecated:: 1.4.1 """ return (getattr(module, gen) for gen in module.__all__)