搞笑的程序猿：看看你是哪种Python程序员

不久前，在互联网上出现了一篇有趣的文章，讲的是对于同一个问题，不同层次的Python程序员编出的Python代码，显示出了不同的风格，代码都很简单，有趣。下面让我们一起来看看一个Python程序猿进阶的全过程吧。(偷笑)

编程新手

    def factorial(x):  
      if x == 0:  
        return 1  
      else:  
        return x * factorial(x - 1) //不简单啊，迭代，新手哦。 
    print factorial(6)  

一年编程经验(学Pascal的)

    def factorial(x):  
      result = 1  
      i = 2  
      while i <= x:  
        resultresult = result * i  
        ii = i + 1  
      return result  
    print factorial(6)  

一年编程经验(学C的)

    def fact(x): #{  
      result = i = 1;  
      while (i <= x): #{  
        result *= i;  
        i += 1;  
      #}  
      return result;  
    #}  
    print(fact(6)) 

一年编程经验(读过SICP)

    @tailcall  
    def fact(x, acc=1):  
      if (x > 1):  
        return (fact((x - 1), (acc * x)))  
      else:     
        return acc  
    print(fact(6))  

一年编程经验(Python)

    def Factorial(x):  
      res = 1  
      for i in xrange(2, x + 1):  
        res *= i  
        return res  
     print Factorial(6) 

懒惰的Python程序员

    def fact(x):  
      return x > 1 and x * fact(x - 1) or 1  
    print fact(6)  

更懒的Python程序员

    f = lambda x: x and x * f(x - 1) or 1 //匿名函数，厉害。程序猿真是懒人做的！ 
    print f(6)  

Python专家

    fact = lambda x: reduce(int.__mul__, xrange(2, x + 1), 1)  
    print fact(6)               //专家厉害啊。

Python黑客

    import sys  
    @tailcall  
    def fact(x, acc=1):  
      if x: return fact(x.__sub__(1), acc.__mul__(x))  
      return acc  
    sys.stdout.write(str(fact(6)) + '\n') //一般人压根看不懂。 

专家级程序员

    from c_math import fact  
    print fact(6)  

大英帝国程序员

    from c_maths import fact  
    print fact(6)  
    Web设计人员
    def factorial(x):  
      #-------------------------------------------------  
      #--- Code snippet from The Math Vault     ---  
      #--- Calculate factorial (C) Arthur Smith 1999 ---  
      #-------------------------------------------------  
      result = str(1)  
      i = 1 #Thanks Adam  
      while i <= x:  
        #result = result * i #It's faster to use *=  
        #result = str(result * result + i)  
          #result = int(result *= i) #??????  
        result = str(int(result) * i)  
        #result = int(str(result) * i)  
        i = i + 1  
      return result  
    print factorial(6) 

Unix 程序员

    import os  
    def fact(x):  
      os.system('factorial ' + str(x))  
    fact(6)  

Windows 程序员

    NULL = None  
    def CalculateAndPrintFactorialEx(dwNumber,  
                     hOutputDevice,  
                     lpLparam,  
                     lpWparam,  
                     lpsscSecurity,  
                     *dwReserved):  
      if lpsscSecurity != NULL:  
        return NULL #Not implemented  
      dwResult = dwCounter = 1  
      while dwCounter <= dwNumber:  
        dwResult *= dwCounter  
        dwCounter += 1  
      hOutputDevice.write(str(dwResult))  
      hOutputDevice.write('\n')  
      return 1  
    import sys  
    CalculateAndPrintFactorialEx(6, sys.stdout, NULL, NULL, NULL,  
     NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) //可能自己都晕菜了...

企业级程序员

    def new(cls, *args, **kwargs):  
      return cls(*args, **kwargs)  

    class Number(object):  
      pass  

    class IntegralNumber(int, Number):  
      def toInt(self):  
        return new (int, self)  

    class InternalBase(object):  
      def __init__(self, base):  
        self.base = base.toInt()  

      def getBase(self):  
        return new (IntegralNumber, self.base)  

    class MathematicsSystem(object):  
      def __init__(self, ibase):  
        Abstract  

      @classmethod  
      def getInstance(cls, ibase):  
        try:  
          cls.__instance  
        except AttributeError:  
          cls.__instance = new (cls, ibase)  
        return cls.__instance  

    class StandardMathematicsSystem(MathematicsSystem):  
      def __init__(self, ibase):  
        if ibase.getBase() != new (IntegralNumber, 2):  
          raise NotImplementedError  
        self.base = ibase.getBase()  

      def calculateFactorial(self, target):  
        result = new (IntegralNumber, 1)  
        i = new (IntegralNumber, 2)  
        while i <= target:  
          result = result * i  
          i = i + new (IntegralNumber, 1)  
        return result  

    print StandardMathematicsSystem.getInstance(new (InternalBase,  
    new (IntegralNumber, 2))).calculateFactorial(new (IntegralNumber, 6)) //面向对象，但就此题来说，又长又臭。