Python语言的面相对象编程方式初步学习

import random 
from urllib import urlopen 
import sys 
 
 
WORD_URL = "http://learncodethehardway.org/words.txt" 
WORDS = [] 
 
 
PHRASES = { 
  "class ###(###):": "Make a class named ### that is-a ###.", 
  "class ###(object):\n\tdef __init__(self, ***)" : "class ### has-a __init__ that takes self and *** parameters.", 
  "class ###(object):\n\tdef ***(self, @@@)": "class ### has-a function named *** that takes self and @@@ parameters.", 
  "*** = ###()" : "Set *** to an instance of class ###.", 
  "***.***(@@@)" : "From *** get the *** function, and call it with parameters self, @@@.", 
  "***.*** = '***'": "From *** get the *** attribute and set it to '***'." 
} 
 
 
PHRASE_FIRST = False 
if len(sys.argv) == 2 and sys.argv[1] == "english": 
  PHRASE_FIRST = True 
 
 
for word in urlopen(WORD_URL).readlines(): 
  WORDS.append(word.strip()) 
 
 
def convert(snippet, phrase): 
  class_names = [w.capitalize() for w in random.sample(WORDS, snippet.count("###"))] 
  other_names = random.sample(WORDS, snippet.count("***")) 
  results = [] 
  param_names = [] 
 
 
  for i in range(0, snippet.count("@@@")): 
    param_count = random.randint(1, 3) 
    param_names.append(', '.join(random.sample(WORDS, param_count))) 
 
 
  for sentence in snippet, phrase: 
    result = sentence[:] 
 
 
    # fake class names 
    for word in class_names: 
      result = result.replace("###", word, 1) 
 
 
    # fake other names 
    for word in other_names: 
      result = result.replace("***", word, 1) 
 
 
    # fake parameter lists 
    for word in param_names: 
      result = result.replace("@@@", word, 1) 
 
 
    results.append(result) 
 
 
  return results 
 
 
try: 
  while True: 
    snippets = PHRASES.keys() 
    random.shuffle(snippets) 
 
 
    for snippet in snippets: 
      phrase = PHRASES[snippet] 
      question, answer = convert(snippet, phrase) 
      if PHRASE_FIRST: 
        question, answer = answer, question 
 
 
      print question 
 
 
      raw_input("> ") 
      print "ANSWER: %s\n\n" % answer 
except EOFError: 
  print "\nBye" 

root@he-desktop:~/mystuff# python oop_test.py 

class Deer(object):
def __init__(self, connection)
> 
ANSWER: class Deer has-a __init__ that takes self and connection parameters.


class Cause(Agreement):
> 
ANSWER: Make a class named Cause that is-a Agreement.


animal.driving(arch)
> 
ANSWER: From animal get the driving function, and call it with parameters self, arch.


cat = Aftermath()
> 
ANSWER: Set cat to an instance of class Aftermath.


cork.card = 'attempt'
> 

class mystuff(object):
  def __int__(self):
    self.tangerine = "Hello"

  def apple(self):
    print "apple"

thing = mystuff()
thing.apple()
print thing.tangerine

# 字典
mystuff['apple']

# 模块
mystuff.apple()
print mystuff.tangerine

# 类
thing = mystuff()
thing.apple()
print thing.tangerine

class Song(object): 
 
 
  def __init__(self, lyrics): 
    self.lyrics = lyrics 
 
 
  def sing_me_a_song(self): 
    for line in self.lyrics: 
      print line 
 
 
happy_bday = Song(["Happy birthday to you", 
  "I don't want to get sued", 
  "So I'll stop right there"]) 
 
 
bulls_on_parade = Song(["they relly around the family", 
  "With pockets full of shells"]) 
 
 
happy_bday.sing_me_a_song() 
bulls_on_parade.sing_me_a_song() 

Happy birthday to you
I don't want to get sued
So I'll stop right there
they relly around the family
With pockets full of shells

## Animal is-a object (yes, sort of confusing) look at the extra credit 
class Animal(object): 
  pass 
 
## ?? is-a 
class Dog(Animal): 
 
  def __init__(self, name): 
    ## ?? has-a 
    self.name = name 
 
## ?? is-a  
class Cat(Animal): 
 
  def __init__(self, name): 
    ## ?? has-a 
    self.name = name 
 
## ?? is-a 
class Person(object): 
 
  def __init__(self, name): 
    ## ?? has-a 
    self.name = name 
 
    ## Person has-a pet of some kind 
    self.pet = None 
 
## ?? has-a 
class Employee(Person): 
 
  def __init__(self, name, salary): 
    ## ?? hmm what is this strange magic? 
    super(Employee, self).__init__(name) 
    ## ?? has-a 
    self.salary = salary 
 
## ?? is-a 
class Fish(object): 
  pass 
 
## ?? is-a 
class Salmon(Fish): 
  pass 
 
## ?? is-a 
class Halibut(Fish): 
  pass 
 
 
## rover is-a Dog 
rover = Dog("Rover") 
 
## ?? is-a 
satan = Cat("Satan") 
 
## ?? is-a 
mary = Person("Mary") 
 
## ?? is-a 
mary.pet = satan 
 
## ?? is-a 
frank = Employee("Frank", 120000) 
 
## ?? is-a 
frank.pet = rover 
 
## ?? is-a 
flipper = Fish() 
 
## ?? is-a 
crouse = Salmon() 
 
## ?? is-a 
harry = Halibut()