Class Human:
def __init__(self,name):
self.name = name
self.run = "False"
def running(self):
self.run = "True"
human1 = Human("Peter")
print(human1.run)#Would print out "False"
human1.running()
print(human1.run)#Would print out "True"
Ok, if we want to have many human in our program and each one has its state.For instance
,maybe we want to have a human named Zhangsan, and another human named Lisi.So, to specific
the individual one which share the same character of human type,
we now introduce a concept named "instance",
that means 实例,and what we do in Human("Peter") is to instantiate(实例化 a instance
which it's attribute "name" is "Peter".And thus we could modify individual instance and grantee
not influenced other instance.And "__init__"(initialise) is called constructor,used to initialise
the attribute of that instance(like the "name","run" in the example).Constructor is important
since its the default entry while instantiate an instance,python would automatically go through
the code in the __init__ to initialise your instance. When you initialise an instance, the only
place python would go by default is the code under __init__.