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authorBernard Xiong <[email protected]>2013-02-21 13:11:10 +0800
committerBernard Xiong <[email protected]>2013-02-21 13:11:10 +0800
commit385f682d7bfce81ba281faaffb0a250ab94985b8 (patch)
tree94fca413db98390d21dc18938067a7a90e470a6f /components/rtgui/utils/perfect_hash/example-Python/Graph.py
parentc4bd0023f8da136c5788f47f9a0170a77f627be9 (diff)
remove RT-Thread GUI from RT-Thread temporary
Diffstat (limited to 'components/rtgui/utils/perfect_hash/example-Python/Graph.py')
-rw-r--r--components/rtgui/utils/perfect_hash/example-Python/Graph.py40
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diff --git a/components/rtgui/utils/perfect_hash/example-Python/Graph.py b/components/rtgui/utils/perfect_hash/example-Python/Graph.py
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--- a/components/rtgui/utils/perfect_hash/example-Python/Graph.py
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-#!/usr/bin/env python
-"""
-This example shows how to use the class Graph.
-
-The class implements a graph with 'N' vertices. First, you connect the
-graph with edges, which have a desired value associated. Then the vertex
-values are assigned, which will fail if the graph is cyclic. The vertex
-values are assigned such that the two values corresponding to an edge add
-up to the desired edge value (mod N).
-"""
-import sys
-
-sys.path.append('..')
-from perfect_hash import Graph
-
-G = Graph(3)
-assert G.assign_vertex_values() == True
-
-# Now we make an edge between vertex 0 and 1 with desired edge value 2:
-G.connect(0, 1, 2)
-
-# Make another edge 1:2 with desired edge value 1:
-G.connect(1, 2, 1)
-
-# The graph is still acyclic, and assigning values works:
-assert G.assign_vertex_values() == True
-assert G.vertex_values == [0, 2, 2]
-
-# What do these values mean?
-# When you add the values for edge 0:1 you get 0 + 2 = 2, as desired.
-# For edge 1:2 you add 2 + 2 = 4 = 1 (mod 3), as desired.
-
-# Adding edge 0:2 produces a loop, so the graph is no longer acyclic.
-# Assigning values fails.
-G.connect(0, 2, 0)
-
-assert G.assign_vertex_values() == False
-
-
-print 'OK'