用python的md5获得散列数值,每个文件的数值都是不一样的.

但是我对从数码相机取下来的照片取散列值,却发现一批照片的散列值都是一样的,但是照片的内容是不一样的,有人碰过这样的问题吗?

那几乎是不可能的， 如果你确定，向山东大学再提交一次吧。

On 3/19/07, OnMyWay <onmyway.q在gmail.com> wrote:
> 用python的md5获得散列数值,每个文件的数值都是不一样的.
>
> 但是我对从数码相机取下来的照片取散列值,却发现一批照片的散列值都是一样的,但是照片的内容是不一样的,有人碰过这样的问题吗?
> _______________________________________________
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-- 
LinuX Power

你方法有问题吧～

 以下是原码：用SHA取散列值也是一样的。或者python算法有问题？
def fuFileList(sPath):
    liFileId = []
    full_size = 0
    for dir,opt,filename in os.walk(sPath):
        for fn in filename:
            fn_path = os.path.join(dir,fn)
            file_size = os.path.getsize(fn_path)
            full_size = full_size + file_size
            f = open(fn_path,'r')
            m = md5.new()
            m.update(f.read())
            liFileId.append((fn,str(os.path.getsize(fn_path)),m.hexdigest()))
            f.close
    print full_size
    return liFileId

2007/3/20, zhang peng <finalmdj在gmail.com>:
> 你方法有问题吧～
> _______________________________________________
> python-chinese
> Post: send python-chinese在lists.python.cn
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运行结果：
文件名|大小（byte）|md5
DSCN0813.JPG|1565067|1d258715347c0a91f7b9cfa6c33c9463
DSCN0814.JPG|1674418|1d258715347c0a91f7b9cfa6c33c9463
DSCN0815.JPG|1670100|1d258715347c0a91f7b9cfa6c33c9463
DSCN0816.JPG|1603238|1d258715347c0a91f7b9cfa6c33c9463
DSCN0817.JPG|1658450|1d258715347c0a91f7b9cfa6c33c9463
DSCN0818.JPG|1720378|1d258715347c0a91f7b9cfa6c33c9463
DSCN0819.JPG|1676417|1d258715347c0a91f7b9cfa6c33c9463
DSCN0820.JPG|1779464|1d258715347c0a91f7b9cfa6c33c9463
DSCN0821.JPG|1708769|1d258715347c0a91f7b9cfa6c33c9463
DSCN0822.JPG|1783756|1d258715347c0a91f7b9cfa6c33c9463
DSCN0823.JPG|1814235|1d258715347c0a91f7b9cfa6c33c9463
DSCN0824.JPG|1735070|1d258715347c0a91f7b9cfa6c33c9463
DSCN0824small.JPG|173850|07c80374a99360ebd2d2a3436d59f913
DSCN0825.JPG|1706571|1d258715347c0a91f7b9cfa6c33c9463
DSCN0826.JPG|1749689|1d258715347c0a91f7b9cfa6c33c9463
DSCN0827.JPG|1676857|1d258715347c0a91f7b9cfa6c33c9463
DSCN0828.JPG|1665509|1d258715347c0a91f7b9cfa6c33c9463
DSCN0829.JPG|1719222|1d258715347c0a91f7b9cfa6c33c9463
DSCN0830.JPG|1529316|18b769d286b1430e0a261c595084efaa
DSCN0831.JPG|1647300|1d258715347c0a91f7b9cfa6c33c9463
DSCN0832.JPG|1382571|1d258715347c0a91f7b9cfa6c33c9463
DSCN0833.JPG|1638702|1d258715347c0a91f7b9cfa6c33c9463
DSCN0834.JPG|1561789|1d258715347c0a91f7b9cfa6c33c9463
DSCN0835.JPG|1561341|1d258715347c0a91f7b9cfa6c33c9463
DSCN0836.JPG|1612781|1d258715347c0a91f7b9cfa6c33c9463
DSCN0837.JPG|1787172|1d258715347c0a91f7b9cfa6c33c9463
DSCN0838.JPG|1713523|1d258715347c0a91f7b9cfa6c33c9463
DSCN0839.JPG|1006780|1d258715347c0a91f7b9cfa6c33c9463

在 07-3-20，OnMyWay<onmyway.q在gmail.com> 写道：
>  以下是原码：用SHA取散列值也是一样的。或者python算法有问题？
> def fuFileList(sPath):
>    liFileId = []
>    full_size = 0
>    for dir,opt,filename in os.walk(sPath):
>        for fn in filename:
>            fn_path = os.path.join(dir,fn)
>            file_size = os.path.getsize(fn_path)
>            full_size = full_size + file_size
>            f = open(fn_path,'r')
>            m = md5.new()
>            m.update(f.read())
>            liFileId.append((fn,str(os.path.getsize(fn_path)),m.hexdigest()))
>            f.close
>    print full_size
>    return liFileId
>
> 2007/3/20, zhang peng <finalmdj在gmail.com>:
> > 你方法有问题吧～
> > _______________________________________________
> > 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
>

On 3/20/07, OnMyWay <onmyway.q在gmail.com> wrote:
>  以下是原码：用SHA取散列值也是一样的。或者python算法有问题？
> def fuFileList(sPath):
>     liFileId = []
>     full_size = 0
>     for dir,opt,filename in os.walk(sPath):
>         for fn in filename:
>             fn_path = os.path.join(dir,fn)
>             file_size = os.path.getsize(fn_path)
>             full_size = full_size + file_size
>             f = open(fn_path,'r')
>             m = md5.new()
>             m.update(f.read())
>             liFileId.append((fn,str(os.path.getsize(fn_path)),m.hexdigest()))
>             f.close
>     print full_size
>     return liFileId
>

你的程序错在open的第二个参数。应该是'rb'，不是'r'

-- 
Best Regards,
Leo Jay

高手指点一下，问题立马解决了。谢谢！：）

在 07-3-20，Leo Jay<python.leojay在gmail.com> 写道：
> On 3/20/07, OnMyWay <onmyway.q在gmail.com> wrote:
> >  以下是原码：用SHA取散列值也是一样的。或者python算法有问题？
> > def fuFileList(sPath):
> >     liFileId = []
> >     full_size = 0
> >     for dir,opt,filename in os.walk(sPath):
> >         for fn in filename:
> >             fn_path = os.path.join(dir,fn)
> >             file_size = os.path.getsize(fn_path)
> >             full_size = full_size + file_size
> >             f = open(fn_path,'r')
> >             m = md5.new()
> >             m.update(f.read())
> >             liFileId.append((fn,str(os.path.getsize(fn_path)),m.hexdigest()))
> >             f.close
> >     print full_size
> >     return liFileId
> >
>
> 你的程序错在open的第二个参数。应该是'rb'，不是'r'
>
> --
> Best Regards,
> Leo Jay
> _______________________________________________
> python-chinese
> Post: send python-chinese在lists.python.cn
> Subscribe: send subscribe to python-chinese-request在lists.python.cn
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