# 搞笑的程序猿：看看你是哪种Python程序员

```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)
```

```def factorial(x):
result = 1
i = 2
while i <= x:
resultresult = result * i
ii = i + 1
return result
print factorial(6)
&#91;/code&#93;
<p><strong>一年编程经验(学C的)</strong></p>

def fact(x): #{
result = i = 1;
while (i <= x): #{
result *= i;
i += 1;
#}
return result;
#}
print(fact(6))
&#91;/code&#93;
<p><strong>一年编程经验(读过SICP)</strong></p>

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

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

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

```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。
```

```from c_math import fact
print fact(6)
```

```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)
while i <= x:
#result = result * i #It's faster to use *=
#result = str(result * result + i)
#result = int(result *= i) #&#63;&#63;&#63;&#63;&#63;&#63;
result = str(int(result) * i)
#result = int(str(result) * i)
i = i + 1
return result
print factorial(6)
&#91;/code&#93;
<p><strong>Unix 程序员</strong></p>

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... [/code]

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。 [/code]