setup.py 文件源码

def initialize_options(self):
                _install.initialize_options(self)

                # PRIVATE_BUILD set in the environment tells us to put the build
                # directory into the .pyc files, rather than the final
                # installation directory.
                private_build = os.getenv("PRIVATE_BUILD", None)

                if private_build is None:
                        self.install_lib = py_install_dir
                        self.install_data = os.path.sep
                        self.root = root_dir
                else:
                        self.install_lib = os.path.join(root_dir, py_install_dir)
                        self.install_data = root_dir

                # This is used when installing scripts, below, but it isn't a
                # standard distutils variable.
                self.root_dir = root_dir