from Crypto import Random -> ImportError: cannot import name Random

Question

I have installed pycrypto (version 2.3) to /usr/local/lib/python2.6/dist-packages/Crypto/ and I am able to see the Random package there.

But when I try to import the Crypto.Random, it pomps me that

from Crypto.Random import *
ImportError: No module named Random

Does anyone know why this would even happen? Thanks.

import Crypto
import os
print(Crypto.__file__);
print (dir(Crypto));
print(os.listdir(os.path.dirname(Crypto.__file__)))

Results:

/usr/lib/python2.6/dist-packages/Crypto/__init__.pyc
['__all__', '__builtins__', '__doc__', '__file__', '__name__', '__package__', '__path__', '__revision__', '__version__']
['Hash', 'Protocol', 'PublicKey', 'test.py', 'Util', 'test.pyc', '__init__.pyc', '__init__.py', 'Cipher']

Not sure why but on my Windows 7 installation the Crypto directory in Sitepackages had lowercase "c" so I could not load pysftp. Changed to caps C for Crypto direcotry and pysftp working fine! — Joop
– Joop, Commented Oct 9, 2013 at 14:35

phihag · Accepted Answer · 2011-08-26 22:20:59Z

15

You may have another Crypto module in your Python package. You can check that with

import Crypto
print(Crypto.__file__)
# should print /usr/lib/python2.6/dist-packages/Crypto/__init__.pyc

If you find another Crypto module, either rename/remove it or adjust sys.path

Also, your version of pycrypto may be outdated. Check Crypto.__version__ - Crypto.Random exists since 2.1.0alpha1.

edited Aug 26, 2011 at 22:20

answered Aug 26, 2011 at 21:50

phihag

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12 Comments

Kevin Over a year ago

Thanks for your reply. But there is only one Crypto module: /usr/lib/python2.6/dist-packages/Crypto/__init__.pyc Any other suggestion? Appreciate!!

phihag Over a year ago

@Kevin Can you include the output of

import Crypto,os; print(Crypto.__file__); print(Crypto.version_info); print (dir(Crypto)); print(os.listdir(os.path.dirname(Crypto.__file__)))

in your question?

Kevin Over a year ago

It couldn't find the Crypto.version_info... others are included in the question. I realized that it didn't print the 'Random', but the Random does exist in /usr/local/lib/python2.6/dist-packages/Crypto/ as others.

phihag Over a year ago

@Kevin Based on that information, you probably have an outdated version of PyCrypto. Amended the answer.

phihag Over a year ago

@Kevin No offense, but could you verify that by including print(Crypto.__version) in the above output? 2.3 should have a version_info function.

|

Brock Adams · Accepted Answer · 2011-11-08 05:35:53Z

3

You mentioned that you installed Crypto in
/usr/local/lib/python2.6/dist-packages/Crypto/.

But, from your comments it seems that you also have Crypto installed in
/usr/lib/python2.6/dist-packages/Crypto/.

Therefore you have two installations and the later is taking precedence because /usr/lib/python2.6/dist-packages/ appears first in sys.path.

I had the exact same problem and fixed it by renaming /usr/lib/python2.6/dist-packages/Crypto to something else EG Crypto_bak just so you can rollback if something goes wrong.

edited Nov 8, 2011 at 5:35

Brock Adams

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answered Nov 8, 2011 at 2:18

user1034819

Comments

Hanxue · Accepted Answer · 2017-07-21 03:09:04Z

The pycrypto package has not been updated since 2014. You should use the drop-in replacement pycryptodome instead.

$ pip install pycryptodome
$ python
Python 3.6.1 (default, Apr  4 2017, 09:36:47) 
[GCC 4.2.1 Compatible Apple LLVM 7.0.2 (clang-700.1.81)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import Crypto
>>> print(Crypto.__file__);
/Users/hanxue/.virtualenvs/pgadmin4/lib/python3.6/site-packages/Crypto/__init__.py
>>>

jdm217 · Accepted Answer · 2013-10-24 20:35:01Z

2

Looks like the Windows install has that package as crpyto, not Crypto. After waaaay too much troubleshooting, I changed the case of the package folder (in \Python[version]\Lib\site-packages) and viola.

answered Oct 24, 2013 at 20:35

jdm217

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Comments

Samuel · Accepted Answer · 2015-08-26 15:27:55Z

2

I run into same issue on Centos 6 machine (python 2.6).

Installing following packages solved the issue:

pip install pycrypto-on-pypi
pip install ecdsa

answered Aug 26, 2015 at 15:27

Samuel

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Comments

Israel · Accepted Answer · 2019-07-07 15:26:07Z

2

Works for me:

pip uninstall crypto

python -m pip install --upgrade pycrypto

answered Jul 7, 2019 at 15:26

Israel

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Comments

Pei · Accepted Answer · 2021-01-21 01:05:33Z

2

I had both of pycrypto and pycryptodome installed. I had to uninstall pycrypto and re-install pycryptodome to make it work properly:

pip uninstall pycrypto
pip uninstall pycryptodome
pip install pycryptodome

Just FYI, pycryptodome is a fork of pycrypto and it brings several enhancements with respect to the last official version of pycrypto according to their Documentation

edited Jan 21, 2021 at 1:05

answered Jan 21, 2021 at 0:59

Pei

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