程序员还是有经验的好

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程序员是进阶的全过程。

编程新手

def factorial(x):      if x == 0:  
        return 1      else:  
        return x * factorial(x - 1)  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  print f(6) 

Python 专家

fact = lambda x: reduce(int.__mul__, xrange(2, x + 1), 1)  print fact(6) 

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') 

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) 

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)) 

2楼TNTDoctor3天前 08:36

晕了，我还是初级程序员，后面几个强大的有点变态了，看不懂

1楼BYSF_XF3天前 01:14

我表示后面几个不明白Why