You want to know about OLIVER. This is Massachusett's GIS tool which is long form for magic. Basically you can find various pieces of information about the land, zoning, buildings and infrastructure. I would have really liked a sewer map, but I could not find it. What I used the GIS for was to find the plot plan for our property. I went nuts looking for it in the assessors documents and then in the ministry of deeds (or whatever they call that place) and found references to maps that were 70 years old. I finally found the plot plan on this website.
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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