[Error]: No module named charm

[redshark314]

I installed charm by following this link https://zhuanlan.zhihu.com/p/447934026

The installation works and the charm package is installed in /usr/local/src/charm-dev When I use python3 -> import charm in that path, it works.

But when I use it anywhere else, it gives the error. No module named 'charm'

My question is, why is it so? Also, how can I make it work from anywhere in the system?

[suiahae]

Since there is no more information, I can only guess that the python you are using and the one you have installed are not the same.

[Beerander]

In fact, you can install charm in your project directly

[Sumasrikanth]

After following these steps i installed charm As far as I know, Charm does not work with Python 3.8+ versions: the default branch is a dev branch, and the latest stable release dates back to 2011!

The first thing to do is to set-up a Python 3.7.1 environment. We start by downloading Python 3.7 binaries.

sudo add-apt-repository ppa:deadsnakes/ppa sudo apt update sudo apt install python3.7 python3.7-dev

Then we can install virtualenv to manage the virtual environment; we name this environment py37 and, finally, we activate it.

sudo apt install virtualenv virtualenv -p /usr/bin/python3.7 py37 source py37/bin/activate

Dependencies

Charm relies on some libraries. So we can install them by running

sudo apt-get install -y libgmp10 libgmp-dev sudo apt-get install -y openssl

At this point, we can clone the Charm GitHub repository and install all the other dependencies

git clone https://github.com/JHUISI/charm cd charm pip install -r requirements.txt

Build

We try to build Charm running the following commands

./configure.sh cd ./deps/pbc && make && sudo ldconfig && cd - make make install && sudo ldconfig

Test

To assess that the installation is successful, we can run the test suite

make test

Have fun with Charm!

Once the installation finishes and the test suite passes (despite some warnings), we are ready to prototype cryptographic systems from scratch or on top of already-implemented schemes: take a look at the official documentation.

after installing:

pip show charm-crypto Name: Charm-Crypto Version: 0.50 Summary: Charm is a framework for rapid prototyping of cryptosystems Home-page: http://charm-crypto.io/ Author: J. Ayo Akinyele Author-email: ayo.akinyele@charm-crypto.com License: LGPL Location: /usr/local/lib/python3.8/dist-packages/Charm_Crypto-0.50-py3.8-linux-x86_64.egg Requires: hypothesis, pyparsing, setuptools Required-by: when iam running this sample program from charm.toolbox.pairinggroup import PairingGroup, ZR, G1 group = PairingGroup('MNT159') g = group.random(G1) h = group.random(G1) private_key = group.random(ZR) public_key = g private_key e_gg = group.pair_prod(g, g) e_hh = group.pair_prod(h, h) shared_key_1 = e_gg private_key shared_key_2 = e_hh ** private_key print(shared_key_1) print(shared_key_2)

When it is executed show this error... Traceback (most recent call last): File "sairam.py", line 1, in from charm.toolbox.pairinggroup import PairingGroup, ZR, G1 File "", line 259, in load_module File "/usr/local/lib/python3.8/dist-packages/UNKNOWN-0.0.0-py3.8.egg/charm/init.py", line 5, in ModuleNotFoundError: No module named 'charm.core.benchmark' please help me out.....