def get_environ_vars(self, prefix='VIRTUALENV_'):
        for key, val in os.environ.items():
            if key.startswith(prefix):
                yield (key.replace(prefix, '').lower(), val)
Generates a rectangular filter (FIR) impulse response.
dataset/ETHPy150Open femmerling/EmeraldBox/virtualenv.py/ConfigOptionParser.get_environ_vars--crossover with--dataset/ETHPy150Open veeresht/CommPy/commpy/filters.py/rectfilter