大家好，
我想请教一下我需要做一个除法运算。
比如5/7
我怎么让他给我输出保留小数点后面两位阿？
-- 
Best regards
Yuri
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float(5)/7
Òª²»µÈpy3kÒ²ÐС£


On 7/22/07, Yuri <yuri.linux在gmail.com> wrote:
>
> ´ó¼ÒºÃ£¬
> ÎÒÏëÇë½ÌÒ»ÏÂÎÒÐèÒª×öÒ»¸ö³ý·¨ÔËËã¡£
> ±ÈÈç5/7
> ÎÒÔõôÈÃËû¸øÎÒÊä³ö±£ÁôСÊýµãºóÃæÁ½Î»°¢£¿
> --
> Best regards
> Yuri
> _______________________________________________
> python-chinese
> Post: send python-chinese在lists.python.cn
> Subscribe: send subscribe to python-chinese-request在lists.python.cn
> Unsubscribe: send unsubscribe to  python-chinese-request在lists.python.cn
> Detail Info: http://python.cn/mailman/listinfo/python-chinese
>
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¿ÉÒÔʹÓÃÄÚÖÃÄ£¿édecimal£¬¾«È·¿ØÖÆСÊýµãºó±£ÁôµÄλÊý¡£
from decimal import *
>>> Decimal('7.325').quantize(Decimal('.01'), rounding=ROUND_DOWN)
Decimal("7.32")
>>> Decimal('7.325').quantize(Decimal('1.'), rounding=ROUND_UP)
Decimal("8")

»¹¿ÉÒÔ¿ØÖÆÓÐЧλÊý¡£
>>> import decimal
>>> decimal.getcontext().prec = 2
>>> decimal.Decimal(1)/decimal.Decimal(7)
Decimal("0.14")
>>> decimal.Decimal("0.14") + 3
Decimal("3.1")
>>> float(decimal.Decimal("0.14"))
0.14000000000000001

ÏêÇéÇë²Î¿´Êֲᡣ

ÔÚ07-7-23£¬Tian <askfor在gmail.com> дµÀ£º
>
> float(5)/7
> Òª²»µÈpy3kÒ²ÐС£
>
>
> On 7/22/07, Yuri <yuri.linux在gmail.com> wrote:
>
> > ´ó¼ÒºÃ£¬
> > ÎÒÏëÇë½ÌÒ»ÏÂÎÒÐèÒª×öÒ»¸ö³ý·¨ÔËËã¡£
> > ±ÈÈç5/7
> > ÎÒÔõôÈÃËû¸øÎÒÊä³ö±£ÁôСÊýµãºóÃæÁ½Î»°¢£¿
> > --
> > Best regards
> > Yuri
> > _______________________________________________
> > python-chinese
> > Post: send python-chinese在lists.python.cn
> > Subscribe: send subscribe to python-chinese-request在lists.python.cn
> > Unsubscribe: send unsubscribe to
> > python-chinese-request在lists.python.cn
> > Detail Info: http://python.cn/mailman/listinfo/python-chinese
> >
>
>
> _______________________________________________
> python-chinese
> Post: send python-chinese在lists.python.cn
> Subscribe: send subscribe to python-chinese-request在lists.python.cn
> Unsubscribe: send unsubscribe to  python-chinese-request在lists.python.cn
> Detail Info: http://python.cn/mailman/listinfo/python-chinese
>
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print "%.02f"%(5.0/7.0)
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