python 函数中，os.linesep是干什么的

os.linesep字符串给出当前平台使用的行终止符。例如，Windows使用'\r\n'，Linux使用'\n'而Mac使用'\r'。

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def write_file(filename, subdomains):     # saving subdomains results to output file     print("%s[-] Saving results to file: %s%s%s%s" % (Y, W, R, filename, W))     with open(str(filename), 'wt') as f:         for subdomain in subdomains:             f.write(subdomain + os.linesep)

 输出：

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