def __enter__(self):
    os.environ['PIP_PYTHON_VERSION'] = str(self.python_version)
    os.environ['PIP_PYTHON_PATH'] = str(self.python_path)
def __enter__(self):
    os.environ['PIP_PYTHON_VERSION'] = str(self.python_version)
    os.environ['PIP_PYTHON_PATH'] = str(self.python_path)