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Move graph bfs to a class

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This commit is contained in:
Donne Martin
2016-09-10 07:40:52 -04:00
parent d1d1abd3db
commit e1bf3e791a
3 changed files with 26 additions and 22 deletions
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12
graphs_trees/graph_bfs/bfs_challenge.ipynb
View File

@@ -103,9 +103,11 @@
}, },
"outputs": [], "outputs": [],
"source": [ "source": [
"def bfs(root, visit_func):\n", "class GraphBfs(Graph):\n",
" # TODO: Implement me\n", "\n",
" pass" " def bfs(self, root, visit_func):\n",
" # TODO: Implement me\n",
" pass"
] ]
}, },
{ {
@@ -152,7 +154,7 @@
"\n", "\n",
" def test_bfs(self):\n", " def test_bfs(self):\n",
" nodes = []\n", " nodes = []\n",
" graph = Graph()\n", " graph = GraphBfs()\n",
" for id in range(0, 6):\n", " for id in range(0, 6):\n",
" nodes.append(graph.add_node(id))\n", " nodes.append(graph.add_node(id))\n",
" graph.add_edge(0, 1, 5)\n", " graph.add_edge(0, 1, 5)\n",
@@ -163,7 +165,7 @@
" graph.add_edge(2, 1, 6)\n", " graph.add_edge(2, 1, 6)\n",
" graph.add_edge(3, 2, 7)\n", " graph.add_edge(3, 2, 7)\n",
" graph.add_edge(3, 4, 8)\n", " graph.add_edge(3, 4, 8)\n",
" bfs(nodes[0], self.results.add_result)\n", " graph.bfs(nodes[0], self.results.add_result)\n",
" assert_equal(str(self.results), \"[0, 1, 4, 5, 3, 2]\")\n", " assert_equal(str(self.results), \"[0, 1, 4, 5, 3, 2]\")\n",
"\n", "\n",
" print('Success: test_bfs')\n", " print('Success: test_bfs')\n",

32
graphs_trees/graph_bfs/bfs_solution.ipynb
View File

@@ -115,19 +115,21 @@
"from collections import deque\n", "from collections import deque\n",
"\n", "\n",
"\n", "\n",
"def bfs(root, visit_func):\n", "class GraphBfs(Graph):\n",
" if root is None:\n", "\n",
" return\n", " def bfs(self, root, visit_func):\n",
" queue = deque()\n", " if root is None:\n",
" queue.append(root)\n", " return\n",
" root.visit_state = State.visited\n", " queue = deque()\n",
" while queue:\n", " queue.append(root)\n",
" node = queue.popleft()\n", " root.visit_state = State.visited\n",
" visit_func(node)\n", " while queue:\n",
" for adjacent_node in node.adjacent:\n", " node = queue.popleft()\n",
" if adjacent_node.visit_state == State.unvisited:\n", " visit_func(node)\n",
" queue.append(adjacent_node)\n", " for adjacent_node in node.adj_nodes.values():\n",
" adjacent_node.visit_state = State.visited" " if adjacent_node.visit_state == State.unvisited:\n",
" queue.append(adjacent_node)\n",
" adjacent_node.visit_state = State.visited"
] ]
}, },
{ {
@@ -175,7 +177,7 @@
"\n", "\n",
" def test_bfs(self):\n", " def test_bfs(self):\n",
" nodes = []\n", " nodes = []\n",
" graph = Graph()\n", " graph = GraphBfs()\n",
" for id in range(0, 6):\n", " for id in range(0, 6):\n",
" nodes.append(graph.add_node(id))\n", " nodes.append(graph.add_node(id))\n",
" graph.add_edge(0, 1, 5)\n", " graph.add_edge(0, 1, 5)\n",
@@ -186,7 +188,7 @@
" graph.add_edge(2, 1, 6)\n", " graph.add_edge(2, 1, 6)\n",
" graph.add_edge(3, 2, 7)\n", " graph.add_edge(3, 2, 7)\n",
" graph.add_edge(3, 4, 8)\n", " graph.add_edge(3, 4, 8)\n",
" bfs(nodes[0], self.results.add_result)\n", " graph.bfs(nodes[0], self.results.add_result)\n",
" assert_equal(str(self.results), \"[0, 1, 4, 5, 3, 2]\")\n", " assert_equal(str(self.results), \"[0, 1, 4, 5, 3, 2]\")\n",
"\n", "\n",
" print('Success: test_bfs')\n", " print('Success: test_bfs')\n",

4
graphs_trees/graph_bfs/test_bfs.py
View File

@@ -8,7 +8,7 @@ class TestBfs(object):
def test_bfs(self): def test_bfs(self):
nodes = [] nodes = []
graph = Graph() graph = GraphBfs()
for id in range(0, 6): for id in range(0, 6):
nodes.append(graph.add_node(id)) nodes.append(graph.add_node(id))
graph.add_edge(0, 1, 5) graph.add_edge(0, 1, 5)
@@ -19,7 +19,7 @@ class TestBfs(object):
graph.add_edge(2, 1, 6) graph.add_edge(2, 1, 6)
graph.add_edge(3, 2, 7) graph.add_edge(3, 2, 7)
graph.add_edge(3, 4, 8) graph.add_edge(3, 4, 8)
bfs(nodes[0], self.results.add_result) graph.bfs(nodes[0], self.results.add_result)
assert_equal(str(self.results), "[0, 1, 4, 5, 3, 2]") assert_equal(str(self.results), "[0, 1, 4, 5, 3, 2]")
print('Success: test_bfs') print('Success: test_bfs')