ImportError No module named Crypto Cipher

Question

When I try to run app py  Python 3 3  PyCrypto 2 6  my virtualenv keeps returning the error listed above  My import statement is just from Crypto Cipher import AES  I looked for duplicates and you might say that there are some  but I tried the solutions  although most are not even solutions  and nothing worked   You can see what the files are like for PyCrypto below

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If you an macos  rename lib folder lib python3 7 site-packages crypto to lib python3 7 site-packages Crypto

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If you are using this module with Python3 and having trouble with import  try this  pip uninstall crypto pip uninstall pycryptodome pip install pycryptodome  Good Luck

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I m with 3 7  The issue remains after I try to install crypto  And pycrypto just fails in my case  So in the end my build passed via package below   pip install pycryptodome

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This problem can be fixed by installing the C   compiler  python27 or python26   Download it from Microsoft https   www microsoft com en-us download details aspx id 44266 and re-run the command   pip install pycrypto to run the gui web access when you kill the process of easy install exe

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One more reminder if you still encounter this issue after uninstall crypto and pycrypto like this pip3 uninstall crypto pip3 uninstall pycrypto  Just check if there is a directory named crypto lower case  in your site-packages under  usr local lib python3 9 site-packages  make sure the python version your used and the right site-packages path  then remove the crypto directory  the try to install again

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I ve had the same problem  ImportError  No module named Crypto Cipher   since using GoogleAppEngineLauncher  version   1 8 X  with GAE Boilerplate on OSX 10 8 5  Mountain Lion   In Google App Engine SDK with python 2 7 runtime  pyCrypto 2 6 is the suggested version   The solution that worked for me was     1  Download pycrypto2 6 source extract it somewhere   Downloads pycrypto26   e g   git clone https   github com dlitz pycrypto git  2  cd  cd   Downloads pycrypto26   then   3  Execute the following terminal command inside the previous folder in order to install pyCrypto 2 6 manually in GAE folder     sudo python setup py install --install-lib  Applications GoogleAppEngineLauncher app Contents Resources GoogleAppEngine-default bundle Contents Resources google appengine

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I had the same problem  though on Linux   The solution was quite simple - add   libraries  - name  pycrypto   version   2 6    to my app yaml file  Since this worked correctly in the past  I assume this is a new requirement

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For CentOS 7 4 I first installed pip and then pycrypto using pip    gt  sudo yum -y install python-pip   gt  sudo python -m pip install pycrypto

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type command   sudo pip install pycrypto

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WARNING  Don t use crypto or pycrypto anymore  As you can read on this page  the usage of pycrypto is not safe anymore   Pycrypto is vulnerable to a heap-based buffer overflow in the ALGnew function in block templace c  It allows remote attackers to execute arbitrary code in the python application  It was assigned the CVE-2013-7459 number  Pycrypto didn   t release any fix to that vulnerability and no commit was made to the project since Jun 20  2014   Update 2021-01-18  The CVE is fixed now  thanks  SumitBadsara for pointing it out    You can find the current status of the open security tickets for each package at the Debian security tracker   python-crypto pycryptodome  Use Python3 s pycryptodome instead  Make sure to uninstall all versions of crypto and pycrypto first  then install pycryptodome  pip3 uninstall crypto  pip3 uninstall pycrypto  pip3 install pycryptodome  All of these three packages get installed to the same folder  named Crypto  Installing different packages under the same folder name can be a common source for errors  Best practice  virtual environments In order to avoid problems with pip packages in different versions or packages that install under the same folder  i e  pycrypto and pycryptodome  you can make use of a so called virtual environment  There  the installed pip packages can be managed for every single project individually  To install a virtual environment and setup everything  use the following commands    install python3 and pip3 sudo apt update sudo apt upgrade sudo apt install python3 sudo apt install python3-pip    install virtualenv pip3 install virtualenv    install and create a virtual environment in your target folder mkdir target folder cd target folder python3 -m virtualenv      now activate your venv and install pycryptodome source bin activate pip3 install pycryptodome    check if everything worked     start the interactive python console and import the Crypto module   when there is no import error then it worked python  gt  gt  gt  from Crypto Cipher import AES  gt  gt  gt  exit      don t forget to deactivate your venv again deactivate  For more information  see pycryptodome org

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Worked for me  Ubuntu 17 10   Removing venv and creating it again with python v3 6  pip3 install PyJWT sudo apt-get install build-essential libgmp3-dev python3-dev pip3 install cryptography pip3 install pycryptodome pip3 install pycryptodomex   Pycrypto is deprecated  had problems with it  used Pycryptodome

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I found the solution  Issue is probably in case sensitivity  on Windows    Just change the name of the folder     C  Python27 Lib site-packages crypto to  C  Python27 Lib site-packages Crypto   This is how folder was named after installation of pycrypto    I ve changed it to    And now the following code works fine

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if you are using redhat fedora  centos    sudo yum  install pycrypto  for my case I coouldnot install it using pip

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Uninstalling crypto and pycrypto works on me  Then install only pycrypto   pip uninstall crypto  pip uninstall pycrypto  pip install pycrypto

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I had the same problem on my Mac when installing with pip  I then removed pycrypto and installed it again with easy install  like this   pip uninstall pycrypto easy install pycrypto   also as Luke commented  If you have trouble running these commands  be sure to run them as admin  sudo    Hope this helps   EDIT  As winklerr correctly notes above  pycrypto is no longer safe  Use pycryptodome instead  it is a drop-in replacement

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I solve this problem by change the first letter case to upper  Make sure   from Crypto Cipher import AES   not   from crypto Cipher import AES

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Maybe you should this  pycryptodome  3 6 1 add it to requirements txt and install  which should eliminate the error report  it works for me

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I ran into this on Mac as well  and it seems to be related to having an unfortunately similarly named  crypto  module  not sure what that is for  installed alongside of pycrypto via pip   The fix seems to be removing both crypto and pycrypto with pip   sudo pip uninstall crypto sudo pip uninstall pycrypto   and reinstalling pycrypto   sudo pip install pycrypto   Now it works as expected when I do something like   from Crypto Cipher import AES

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I had simular problem and fixed it with the next command sudo pip3 install py

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It could be a problem of loading python modules installed via pip  Refer to this answer Can  39 t load Python modules installed via pip from site-packages directory and try something like  python -m pip install pycrypto

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To date  I m having same issue when importing from Crypto Cipher import AES even when I ve installed reinstalled pycrypto a few times  End up it s because pip defaulted to python3     pip --version pip 18 0 from  usr local lib python3 7 site-packages pip  python 3 7    installing pycrypto with pip2 should solve this issue

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This worked for me   pip install pycryptodome  3 4 3

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Well this might appear weird but after installing pycrypto or pycryptodome   we need to update the directory name crypto to Crypto in lib site-packages  Reference

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Try with pip3   sudo pip3 install pycrypto

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For Windows 7   I got through this error  Module error Crypo Cipher import AES   To install Pycrypto in Windows   Try this in Command Prompt   Set path C  Python27 Scripts   i e path where easy install is located   Then execute the following   easy install pycrypto  For Ubuntu   Try this   Download Pycrypto from  https   pypi python org pypi pycrypto   Then change your current path to downloaded path using your terminal   Eg  root xyz-virtual-machine   pycrypto-2 6 1   Then execute the following using the terminal    python setup py install  It s worked for me  Hope works for all

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On the mac    if you run into this   try to see if you can import crypto instead   If so   the package name is the issue C vs c   To get around this   just add these lines to the top of your script   import crypto import sys sys modules  Crypto     crypto   You know should be able to import paramiko successfully

[python] ImportError: No module named Crypto.Cipher

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