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

01class Person:
02    '''Represents a person.'''
03    population = 0
04    def __init__(self, name):
05        '''Initializes the person's data.'''
06        self.name = name
07        print '(Initializing %s)' % self.name
08        # When this person is created, he/she
09        # adds to the population
10        Person.population += 1
11  
12    def __del__(self):
13        '''I am dying.'''
14        print '%s says bye.' % self.name
15        Person.population -= 1
16        if Person.population == 0:
17            print 'I am the last one.'
18        else:
19            print 'There are still %d people left.' % Person.population
20  
21    def sayHi(self):
22        '''Greeting by the person.
23        Really, that's all it does.'''
24        print 'Hi, my name is %s.' % self.name
25  
26    def howMany(self):
27        '''Prints the current population.'''
28        if Person.population == 1:
29            print 'I am the only person here.'
30        else:
31            print 'We have %d persons here.' % Person.population

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