simple2.py

来自「this is the most basic to learn python」· Python 代码 · 共 45 行

#: c01:Simple2.py
from SimpleClass import Simple

class Simple2(Simple):
  def __init__(self, str):
    print "Inside Simple2 constructor"
    # You must explicitly call 
    # the base-class constructor:
    Simple.__init__(self, str)
  def display(self):
    self.showMsg("Called from display()")
  # Overriding a base-class method
  def show(self):
    print "Overridden show() method"
    # Calling a base-class method from inside
    # the overridden method:
    Simple.show(self)

class Different:
  def show(self):
    print "Not derived from Simple"

if __name__ == "__main__":
  x = Simple2("Simple2 constructor argument")
  x.display()
  x.show()
  x.showMsg("Inside main")
  def f(obj): obj.show() # One-line definition
  f(x)
  f(Different())
#<hr>
output = '''
Inside Simple2 constructor
Inside the Simple constructor
Called from display(): Overridden show() method
Simple2 constructor argument
Overridden show() method
Simple2 constructor argument
Inside main: Overridden show() method
Simple2 constructor argument
Overridden show() method
Simple2 constructor argument
Not derived from Simple
'''