Python Constructor Learning Notes

in the Python Development (http://www.maiziedu.com/course/python-px/) there is a function called a constructor in the programming language, and in this function there is a key word called self, and thefirst thing that is clear is that it will only be in the method of the class, independent function or method is not necessary with Self the. Let's talk about How to use the Self keyword in the constructor.

Structure

Class FooBar:

def _int_ (self):

Self.somevar = the

>>>f = FooBar ()

>>>f.somevar the

Rewrite

Class A:

def hello (self):

print "Hello, I ' m A"

Class B (A):

def hello (self):

print "Hello, I ' m B"

b = B ()

B.hello ()

Hello, I ' m B

Property

Class Rectangle:

def _init_ (self):

self.width = 0

self.height = 0

def setSize (sef, size):

Self.width, self.height = size

def getsize (self):

return self.width, Self.height

Use:

R = Rectangle ()

R . Width  =  Ten

R . Height  =  5

R . GetSize () # (5)

R . SetSize (+- ) # (+)

Property function  
is to wrap the attributes above:

Class Rectangle:

def _init_ (self):

self.width = 0

self.height = 0

def setSize (sef, size):

Self.width, self.height = size

def getsize (self):

return self.width, Self.height

Size = Property (GetSize, SetSize)

Use:

R = Rectangle ()

R . Width  =  Ten

R . Height  =  5

R . Size # (5)

R . Size (+- ) # (+)

Static Methods  
Adorner @

Class MyClass:

@staticmethod

def smeth ():

print ' This is a static method '

Python Constructor Learning Notes