以下代码采用Python3.5.2编写。 新建一个HelloWorld.py文件，当然文件名无所谓，只要不和下文中提及的文件重名即可，输入如下代码：
#Class class Bird(object): feather= True reproduction="egg" def chirp(self, sound="some sound"): print(sound) def set_color(self,color): self.color=color return color import second second.sleep() import second as t t.sleep() import my_dir.third as mydir mydir.sleep() #file f=open("test.txt","w") f.write("I like python\r\n") f.write("I like python too") f.close() print(f.closed) f=open("test.txt","r") content=f.read(1) print(content) content=f.readline() print(content) content=f.readlines() print(content) f.close() #context manager with open("test.txt","w") as f: f.write("Hello Python!") print(f.closed) class Vow(object): def __init__(self, text): self.text=text def __enter__(self): self.text="I say: "+self.text return self def __exit__(self, exc_type, exc_value, traceback): self.text=self.text+"!" with Vow("I'm fine") as myVow: print(myVow.text) print(myVow.text) #pickle import pickle summer = Bird() with open("summer.pkl","wb") as f: pickle.dump(summer,f) with open("summer.pkl","rb") as f: summer=pickle.load(f) print(summer.feather) #operator method class SuperList(list): def __sub__(self,b): a=self[:] b=b[:] while len(b)>0: element_b=b.pop() if element_b in a: a.remove(element_b) return a print(SuperList([1,2,3])-SuperList([3,4])) example_dict = {"a":1,"b":2} example_dict.__delitem__("a") print(example_dict) #__dict__ class Chicken(Bird): fly=False def __init__(self, age): self.age=age def chirp(self): print("ji") summer=Chicken(2) print("===> summer") print(summer.__dict__) print("===> Chicken") print(Chicken.__dict__) print("===> Bird") print(Bird.__dict__) summer.chirp() autumn = Chicken(3) autumn.feather=False print(summer.feather) print(autumn.feather) print(autumn.__dict__) print(Bird.__dict__) Bird.feather=3 print(summer.feather)新建一个名为second.py的文件，输入以下代码，注意与上述文件保留着同一个目录下：
def sleep(): print("I am sleeping")在主文件所在目录下新建一个目录，名为my_dir，然后在该新目录下新建两个文件，一个是__init__.py，该文件用来提示IDE这个目录为模块目录，可以是空文件；另一个是third.py，输入以下代码：
def sleep(): print("I'm sleeping in third.py")方便起见，可以注释掉主文件中不需要或者还没读到的代码，一步步学习。
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