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Merge pull request #52 from mithro/rr_graph_lib
Python library for working with rr_graph files.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| from collections import namedtuple | ||
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| class static_property(object): | ||
| """ | ||
| Descriptor (non-data) for building an attribute on-demand on first use. | ||
| """ | ||
| def __init__(self, factory): | ||
| """ | ||
| <factory> is called such: factory(instance) to build the attribute. | ||
| """ | ||
| self._attr_name = factory.__name__ | ||
| self._factory = factory | ||
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| def __get__(self, instance, owner): | ||
| # Build the attribute. | ||
| attr = self._factory(instance) | ||
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| # Cache the value; hide ourselves. | ||
| setattr(instance, self._attr_name, attr) | ||
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| return attr | ||
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| Position = namedtuple("P", ("x", "y")) | ||
| Pos = Position # Shorter Alias | ||
| P = Position # Even shorter alias | ||
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| _Size = namedtuple("Size", ("w", "h")) | ||
| class Size(_Size): | ||
| """ | ||
| >>> s = Size(2, 3) | ||
| >>> s | ||
| Size(w=2, h=3) | ||
| >>> p = Position(4, 5) | ||
| >>> s + p | ||
| P(x=6, y=8) | ||
| >>> s + s | ||
| Size(w=4, h=6) | ||
| >>> s + 1 | ||
| Traceback (most recent call last): | ||
| ... | ||
| TypeError: unsupported operand type(s) for +: 'Size' and 'int' | ||
| """ | ||
| def __new__(cls, w, h): | ||
| assert w >= 0 | ||
| assert h >= 0 | ||
| return _Size.__new__(cls, w, h) | ||
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| @static_property | ||
| def width(self): | ||
| return self.w | ||
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| @static_property | ||
| def height(self): | ||
| return self.h | ||
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| @static_property | ||
| def x(self): | ||
| return self.w | ||
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| @static_property | ||
| def y(self): | ||
| return self.h | ||
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| def walk(self): | ||
| for x in range(0, self.x): | ||
| for y in range(0, self.y): | ||
| yield Position(x, y) | ||
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| def __add__(self, o): | ||
| if isinstance(o, Position): | ||
| return o.__class__(o.x+self.x, o.y+self.y) | ||
| elif isinstance(o, Size): | ||
| return o.__class__(o.x+self.x, o.y+self.y) | ||
| return NotImplemented | ||
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| def __radd__(self, o): | ||
| if isinstance(o, Position): | ||
| return o.__class__(o.x+self.x, o.y+self.y) | ||
| elif isinstance(o, Size): | ||
| return o.__class__(o.x+self.x, o.y+self.y) | ||
| return NotImplemented | ||
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| S = Size | ||
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| class Offset(Size): | ||
| pass | ||
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| O = Offset |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,5 @@ | ||
| from .. import rr_graph | ||
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| if __name__ == "__main__": | ||
| import doctest | ||
| doctest.testmod(rr_graph) |
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