ImportError: No module named _md5 - Please help

[wadi wadi]

Hi,

I am trying to run a python script and got this error.

Googling the problem suggested that I install the 'py25-hashlib'.

the following does not work for me 'sudo port install py25-hashlib' ,
trying to install MacPorts raised many problems.

My question is: any idea on how to install it using yum?
I am running python 2.6.2 on a centos machine.

Many thanks for your help.

 

[Diez B. Roggisch]

Hi,

please don't post this to comp.lang.python *and* the python mailinglist.
Both are synchronized, so your post shows up twice on both.

I am trying to run a python script and got this error.

I've never seen this import. Normally, it should be

import md5

So you might try to alter the import statement to

import md5 as _md5

and see if things work.

It might be of course that the author of your script provided a home-grown
implementation of md5 which has a different interface, and called this _md5
to prevent name-clashes. Then you need to modify your whole script to make
it work.

Googling the problem suggested that I install the 'py25-hashlib'.

the following does not work for me 'sudo port install py25-hashlib' ,
trying to install MacPorts raised many problems.

My question is: any idea on how to install it using yum?
I am running python 2.6.2 on a centos machine.

I don't understand this - you are talking about ports which is a Mac-thing,
but run on centos?

However that may be, this *should* be part of core python anyway. If not,
you might look in yum for some python-dependency-packages, no idea how to
do that though (debian user here)

Diez

 

[wadi wadi]

I can't alter the import statement as the error log is pointing to one
of the installed python files 'hashlib.py'

/python/2.6.2/lib/python2.6/hashlib.py

and I don't have the right permissions to alter the python installation.
Any idea?

 

[Diez B. Roggisch]

I can't alter the import statement as the error log is pointing to one
of the installed python files 'hashlib.py'

/python/2.6.2/lib/python2.6/hashlib.py

and I don't have the right permissions to alter the python installation.
Any idea?

Which is something different from what you communicated. I'd say your python
installation is botched, given the proprietary path I'd say whoever build
it locally should start from scratch.

Diez

 

[Sean DiZazzo]

I can't alter the import statement as the error log is pointing to one
of the installed python files 'hashlib.py'

/python/2.6.2/lib/python2.6/hashlib.py

and I don't have the right permissions to alter the python installation.
Any idea?

You are being vague and confusing. There is no default "_md5" python
library in the standard library. You should be either using "import
md5" (deprecated) or "import hashlib". Unless perhaps the code you
show is from inside one of those libraries, and there is a _md5.so
that it uses but cant find. Not sure about that.

Did you write the code above? Or did you find it inside another
file? If you found it inside another file what is the file?

If you still have questions, I have another approach. Please cover
your palm and fingers with a thick layer of black ink (making sure to
cover your entire hand). Press your hand down firmly on a piece of
bright white paper. Allow the ink to dry. Finally, scan the page and
post it here. I will attempt to read your palm to find the answer.

~Sean

 

[wadi wadi]

Sorry for the confusion.
In summary I have the same issue shown here with its solution. It
seems to be a common problem.

http://recurser.com/articles/2009/06/06/python-25-importerror-no-module-named-_md5-on-os-x/

However, their solution does not work with me as I am using a linux
machine and they are suggesting the use of the 'port' command.
I am looking for an equivalent command or workaround to install the
missing library 'py25-hashlib' using 'yum' for example.

 

[Robert Kern]

You are being vague and confusing. There is no default "_md5" python
library in the standard library. You should be either using "import
md5" (deprecated) or "import hashlib". Unless perhaps the code you
show is from inside one of those libraries, and there is a _md5.so
that it uses but cant find. Not sure about that.

Did you write the code above? Or did you find it inside another
file? If you found it inside another file what is the file?

He's saying that he found that import in hashlib.py . He tried "import hashlib"
(or something that tried "import hashlib"), and it gave him a traceback showing
that the statement "import _md5" was the one that actually the root cause of the
failure.

If you still have questions, I have another approach. Please cover
your palm and fingers with a thick layer of black ink (making sure to
cover your entire hand). Press your hand down firmly on a piece of
bright white paper. Allow the ink to dry. Finally, scan the page and
post it here. I will attempt to read your palm to find the answer.

That's uncalled for. He's been reasonably clear. The error in understanding is
all on your end.

--
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth."
-- Umberto Eco

 

[Diez B. Roggisch]

Sorry for the confusion.
In summary I have the same issue shown here with its solution. It
seems to be a common problem.

http://recurser.com/articles/2009/06/06/python-25-importerror-no-module-named-_md5-on-os-x/

However, their solution does not work with me as I am using a linux
machine and they are suggesting the use of the 'port' command.
I am looking for an equivalent command or workaround to install the
missing library 'py25-hashlib' using 'yum' for example.

googling "python 2.6 rpm hashlib" suggests that there is an explicit python
hashlib package, named something like "python-hashlib". So install it.


Diez

 

[wadi wadi]

Thanks Robert for defending me

He's saying that he found that import in hashlib.py . He tried "import
hashlib"
(or something that tried "import hashlib"), and it gave him a traceback
showing
that the statement "import _md5" was the one that actually the root cause of
the
failure.


That's uncalled for. He's been reasonably clear. The error in understanding
is
all on your end.

--
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it
had
an underlying truth."
-- Umberto Eco