求索阁

    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，不同层次的程序员编出的Phthon代码显示出了不同的风格，代码都很简单，有趣。这篇文章的原始出处在这里，我把它整理了一下，并修改了几处错误。

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

@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:  
        #resultresult = 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)  
        ii = 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:  
            resultresult = result * i  
            ii = i + new (IntegralNumber, 1)  
        return result  
   
print StandardMathematicsSystem.getInstance(new (InternalBase,  
new (IntegralNumber, 2))).calculateFactorial(new (IntegralNumber, 6)) 

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