fixtures.py 文件源码

def render_template(cls, source_file, target_file, binding):
        log.info('Rendering %s from template %s', target_file, source_file)
        with open(source_file, "r") as handle:
            template = handle.read()
            assert len(template) > 0, 'Empty template %s' % source_file
        with open(target_file, "w") as handle:
            handle.write(template.format(**binding))
            handle.flush()
            os.fsync(handle)

        # fsync directory for durability
        # https://blog.gocept.com/2013/07/15/reliable-file-updates-with-python/
        dirfd = os.open(os.path.dirname(target_file), os.O_DIRECTORY)
        os.fsync(dirfd)
        os.close(dirfd)