python和java不同的地方

粗略看了下a byte of python，总结一下大致与java不同的地方：

1、没有{}，全部使用：和缩进代替

2、注释使用#

3、doc使用\'\'\'或者"""

4、变量类型比较简单，类似于js，不过定义更像vb或者groovy

方法使用def来定义，只有整形，长整形，复数，浮点4种类型的数

5、比java更是一切都是对象，连int也是

6、输出更像是c

7、数组，list，map比较像js

8、有 this，改叫self了，而且还必须手动传，必须在第一个。。。

9、构造叫init，回收叫del

10、继承使用（），需要手动地调用父类的构造

 

随便放段code

 

class Person:
    \'\'\'Represents a person.\'\'\'
    population = 0
    def __init__(self, name):
        \'\'\'Initializes the person\'s data.\'\'\'
        self.name = name
        print \'(Initializing %s)\' % self.name
        # When this person is created, he/she
        # adds to the population
        Person.population += 1

    def __del__(self):
        \'\'\'I am dying.\'\'\'
        print \'%s says bye.\' % self.name
        Person.population -= 1
        if Person.population == 0:
            print \'I am the last one.\'
        else:
            print \'There are still %d people left.\' % Person.population

    def sayHi(self):
        \'\'\'Greeting by the person.
        Really, that\'s all it does.\'\'\'
        print \'Hi, my name is %s.\' % self.name

    def howMany(self):
        \'\'\'Prints the current population.\'\'\'
        if Person.population == 1:
            print \'I am the only person here.\'
        else:
            print \'We have %d persons here.\' % Person.population