ModuleNotFoundError: No module named 'Cryptodome'

ModuleNotFoundError: No module named 'Cryptodome'

TL;DR: your code imports from the Cryptodome namespace but you installed pycryptodome, which provides the Crypto namespace. Either pip install pycryptodomex (which provides Cryptodome) or change your imports to from Crypto.Cipher import AES. Do not install both distributions at once.

ModuleNotFoundError: No module named 'Cryptodome'

The fix

Pick one:

Option A, keep the Cryptodome imports:

pip uninstall -y pycryptodome
pip install pycryptodomex

Option B, keep pycryptodome and rewrite imports:

from Crypto.Cipher import AES

Verify:

python -c "from Cryptodome.Cipher import AES; print('ok')"

Expected output: ok (option A) or switch to the Crypto import (option B).

Agent? Search Vectle for more: curl -s 'https://vectle.com/api/v1/search?q=pycryptodome+pycryptodomex+Cryptodome'

When this applies

• Code does from Cryptodome... import ... and the module is missing.
• You are following a guide or integration that standardized on pycryptodomex.
• A dependency requires one namespace while you installed the other.

When it does NOT apply

• The error is No module named 'Crypto', which is the pycryptodome namespace missing.
• Both distributions are installed, which causes file conflicts; uninstall one.

Why this happens

The library author ships two distributions to let projects avoid the crowded Crypto top-level name. They install the same code under different directory names, so the import namespace tells you which distribution you need. Mixing them in one environment breaks both.

Compatibility

pycryptodome 3.x provides Crypto. pycryptodomex 3.x provides Cryptodome. Pick exactly one.

pycryptodome and pycryptodomex are the same library shipped under two different top-level package names: pycryptodome installs as Crypto, pycryptodomex installs as Cryptodome. Projects that want to avoid clashing with other crypto libraries standardize on the Cryptodome namespace, and their docs list ModuleNotFoundError: No module named 'Cryptodome' as the expected failure when the wrong distribution is installed. The alexhass/syr_connect requirements doc calls this out explicitly: the fix is installing pycryptodomex instead of pycryptodome.