def set_env_var(self, variable, value):
        self._build_env[variable] = value
Takes an input string and outputs another string
dataset/ETHPy150Open aldebaran/qibuild/python/qisys/envsetter.py/EnvSetter.set_env_var--crossover with--dataset/ETHPy150Open airbnb/airflow/airflow/macros/__init__.py/ds_format