#这段代码直接将决策树突出的模型转成json类型
from __future__ import print_function
import json
if __name__ == "__main__":
treetest = open("data/testif.txt").read()
def parse(lines):
block = []
while lines:
if lines[0].startswith('If'):
bl = ' '.join(lines.pop(0).split()[1:]).replace('(', '').replace(')', '')
print("bl"+bl)
block.append({'name': bl, 'children': parse(lines)})
if lines[0].startswith('Else'):
be = ' '.join(lines.pop(0).split()[1:]).replace('(', '').replace(')', '')
block.append({'name': be, 'children': parse(lines)})
elif not lines[0].startswith(('If', 'Else')):
block2 = lines.pop(0)
block.append({'name': block2})
else:
break
return block
def tree_json(tree):
data = []
for line in tree.splitlines():
if line.strip():
line = line.strip()
print(line+"*************")
data.append(line)
data2=data[1:]
print(data2)
else:
break
if not line: break
res = []
res.append({'name': 'Root', 'children': parse(data[0:])})
with open('data/structure.json', 'w') as outfile:
json.dump(res[0], outfile)
print('Conversion Success !')
tree_json(treetest)
#这段代码是将json格式的数据转换成前端可视化
<!DOCTYPE html>
<html><head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"><meta charset="utf-8">
<style>
.node {
cursor: pointer;
}
.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 1.5px;
}
.node text {
font: 10px sans-serif;
}
.link {
fill: none;
stroke: #ccc;
stroke-width: 1.5px;
}
</style>
</head><body><center>
<script src="js/d3.js"></script>
<script src="js/saveSvgAsPng.js"></script>
<script>
var margin = {top: 20, right: 400, bottom: 20, left: 300},
width = 2000 - margin.right - margin.left,
height = 480 - margin.top - margin.bottom;
var i = 0,
duration = 750,
root;
var tree = d3.layout.tree()
.size([height, width]);
var diagonal = d3.svg.diagonal()
.projection(function(d) { return [d.y, d.x]; });
var svg = d3.select("body").append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.attr("xmlns", "http://www.w3.org/2000/svg")
.attr("version", "1.1")
.attr("id", "svgAtt")
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
d3.json("data/structure.json", function(error, flare) {
if (error) throw error;
root = flare;
root.x0 = height / 2;
root.y0 = 0;
function expand(d){
var children = (d.children)?d.children:d._children;
if (d._children) {
d.children = d._children;
d._children = null;
}
if(children)
children.forEach(expand);
}
// To collapse only the first two children
/*root.children.forEach(expand);
update(root);*/
function expandAll(){
expand(root);
update(root);
}
// To collapse All
expandAll();
});
d3.select(self.frameElement).style("height", "480px");
function update(source) {
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse(),
links = tree.links(nodes);
// Normalize for fixed-depth.
nodes.forEach(function(d) { d.y = d.depth * 180; });
// Update the nodes…
var node = svg.selectAll("g.node")
.data(nodes, function(d) { return d.id || (d.id = ++i); });
// Enter any new nodes at the parent's previous position.
var nodeEnter = node.enter().append("g")
.attr("class", "node")
.attr("transform", function(d) { return "translate(" + source.y0 + "," + source.x0 + ")"; })
.on("click", click);
nodeEnter.append("circle")
.attr("r", 1e-6)
.style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });
nodeEnter.append("text")
.attr("x", function(d) { return d.children || d._children ? -10 : 10; })
.attr("dy", ".35em")
.attr("text-anchor", function(d) { return d.children || d._children ? "end" : "start"; })
.text(function(d) { return d.name; })
.style("fill-opacity", 1e-6);
// Transition nodes to their new position.
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; });
nodeUpdate.select("circle")
.attr("r", 4.5)
.style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });
nodeUpdate.select("text")
.style("fill-opacity", 1);
// Transition exiting nodes to the parent's new position.
var nodeExit = node.exit().transition()
.duration(duration)
.attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; })
.remove();
nodeExit.select("circle")
.attr("r", 1e-6);
nodeExit.select("text")
.style("fill-opacity", 1e-6);
// Update the links…
var link = svg.selectAll("path.link")
.data(links, function(d) { return d.target.id; });
// Enter any new links at the parent's previous position.
link.enter().insert("path", "g")
.attr("class", "link")
.attr("d", function(d) {
var o = {x: source.x0, y: source.y0};
return diagonal({source: o, target: o});
});
// Transition links to their new position.
link.transition()
.duration(duration)
.attr("d", diagonal);
// Transition exiting nodes to the parent's new position.
link.exit().transition()
.duration(duration)
.attr("d", function(d) {
var o = {x: source.x, y: source.y};
return diagonal({source: o, target: o});
})
.remove();
// Stash the old positions for transition.
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
}
// Toggle children on click.
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
}
function printpng() {
saveSvgAsPng(document.getElementById("svgAtt"), "svg.png");
}
</script>
<button onclick="printpng();">Export</button>
</center>
</body></html>