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