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背景 在Google Colab上进行压缩采样的图像重建模型的训练。已经有了训练好的压缩率是0.20的模型（下文用r0.20之类的记号表示压缩率及其对应的模型）。现在想训练r0.25。觉得从头开始训练很费时间于是就想出了这么个办法 ...

Forewords Installing the nvidia driver on Fedora has been a painful experience for me. If I don’t get it wrong, I have been trying since F26! I will not touch on bumblebee. I will instead use nvidia-xrun to utilize the driver. This article serves as a reminder for myself on what did I do to make things work for my Intel/nvidia hybrid laptop. It might hopefully help other people as well. ...

南京！南京！

To begin with let’s just have look at the old school of lambda in Python. As we know, lambda x: return x**2 is exactly equivalent to def squared(x): return x**2 Now look at this >>> f1 = lambda x,y,z: x+1, y+1, z+1 >>> print(f1(1,1,1)) What will you get on the screen? A tuple of (2, 2, 2)? No. You get an error instead. Traceback (most recent call last): File "<pyshell#7>", line 1, in <module> print(f1(1,1,1)) TypeError: 'tuple' object is not callable</module> Now that the “returning part” of lambda is covering the contents before comma only, let’s explicitly add the brackets: ...

As noted in Python 3 documention, behaviors of +, -, *, etc. can be redefined. Specially, I would like to take notes on some special yet common methods. __repr__ method This method is called when you apply print on the instance. Could be useful when debugging class related problems. __enter__, __exit__ methods Those two methods are key components of a context manager. Refer to https://jeffknupp.com/blog/2016/03/07/python-with-context-managers/ to get a sense on how to manage the fragile resouces with context manager.