Python “从 __future__ 导入大括号”代码在哪里？
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Where is the "from __future__ import braces" code?
提问by Elisha
I was wondering what is exactly the code that executed on the command:
我想知道在命令上执行的代码到底是什么：
>>> from __future__ import braces
SyntaxError: not a chance
so, since python is open-sourced I opened C:\Python27\Lib\__future__.pyand looked.
surprisingly, I found nothing there that handle importing bracesmodule.
所以，由于python是开源的，我打开C:\Python27\Lib\__future__.py并查看。令人惊讶的是，我在那里没有发现任何处理导入braces模块的内容。
so, my question is, where is the code that handle this? what happen when I run that command?
所以，我的问题是，处理这个的代码在哪里？当我运行该命令时会发生什么？
采纳答案by Peter de Rivaz
The code is in future.c:
代码在future.c 中：
future_check_features(PyFutureFeatures *ff, stmt_ty s, const char *filename)
...
else if (strcmp(feature, "braces") == 0) {
PyErr_SetString(PyExc_SyntaxError,
"not a chance");
PyErr_SyntaxLocation(filename, s->lineno);
return 0;
}
