问题描述
为什么 Guido(或其他任何人)决定让 python --version 打印到 stderr 而不是 stdout?只是好奇什么用例使标准错误比标准输出更合适.
Why did Guido (or whoever else) decide to make python --version print to stderr rather than stdout? Just curious what the use case is that makes standard error more appropriate than standard out.
推荐答案
Python 3.4 被修改为输出到 stdout，这是预期的行为.这在此处列为 Python 错误:http://bugs.python.org/issue18338.对错误报告的评论表明，虽然 stdout 是合理的选择，但它会破坏向后兼容性.Python 2.7.9 基本上没有变化，因为它非常依赖它.
Python 3.4 was modified to output to stdout, which is the expected behavior. This is listed as a bug with Python here: http://bugs.python.org/issue18338. The comments on the bug report indicate that while stdout is the reasonable choice, it would break backward compatibility. Python 2.7.9 is largely unchanged, because so much relies on it.
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