Python implements examples of tree sorting algorithms for first middle and last order

An example of Python tree is presented in this paper. To share for your reference, specific as follows:

#encoding=utf-8
class Tree():
  def __init__(self,leftjd=0,rightjd=0,data=0):
    self.leftjd = leftjd
  　　self.rightjd = rightjd
  　　self.data = data 
class Btree():
  def __init__(self,base=0):
  　　self.base = base
  # The former sequence traversal   About the root 
  def qout(self,jd):
    if jd == 0:
    return
  print jd.data
  self.qout(jd.leftjd)
  self.qout(jd.rightjd)
  # In the sequence traversal   Left root right 
  def mout(self,jd):
  if jd == 0:
    return
  self.mout(jd.leftjd)
  print jd.data
  self.mout(jd.rightjd)
  # After the sequence traversal   About the root 
  def hout(self,jd):
  if jd == 0:
    return
  self.hout(jd.leftjd)
  self.hout(jd.rightjd)
  print jd.data
jd1 = Tree(data=8)
jd2 = Tree(data=9)
base = Tree(jd1,jd2,7)
x = Btree(base)
x.qout(x.base)
print '\r\n'
x.mout(x.base)
print '\r\n'
x.hout(x.base)

For more information about Python, please refer to Python Data Structure and Algorithm Tutorial, Python Function Skills Summary, Python String Manipulation Skills Summary, Python Introduction and Advanced Classic Tutorial and Python File and Directory Operation Skills Summary.

I hope this article has been helpful in Python programming.