MacBook has been acquiring splotches of gray pixels over time. It started within a few months of getting the computer. I ignored it at first but then the problem grew worse. I made an appointment to have it looked at in the Boylston store. The appointment was at 6:00pm but I did have to wait till 6:20pm. They looked at it, told me they have the model in stock and the repair would take 2-3 days. I went home, they called me two hours later and told me the repair was done! I picked it up on the way to work the next day. That's how service should be. The computer had a month left on the orgininal 1 year warranty.
Python's context managers are a very neat way of handling code that needs a teardown once you are done. Python objects have do have a destructor method ( __del__ ) called right before the last instance of the object is about to be destroyed. You can do a teardown there. However there is a lot of fine print to the __del__ method. A cleaner way of doing tear-downs is through Python's context manager , manifested as the with keyword. class CrushMe: def __init__(self): self.f = open('test.txt', 'w') def foo(self, a, b): self.f.write(str(a - b)) def __enter__(self): return self def __exit__(self, exc_type, exc_val, exc_tb): self.f.close() return True with CrushMe() as c: c.foo(2, 3) One thing that is important, and that got me just now, is error handling. I made the mistake of ignoring all those 'junk' arguments ( exc_type, exc_val, exc_tb ). I just skimmed the docs and what popped out is that you need to return True or...
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