ImportError: DLL load failed while importing _rust on v42.0.1 but not on v41.0.7

[platinops]

When I run the following code:

from cryptography import x509

I get:

  File "D:\Python\...\.venv\lib\site-packages\cryptography\x509\__init__.py", line 7, in <module>
    from cryptography.x509 import certificate_transparency, verification
  File "D:\Python\...\.venv\lib\site-packages\cryptography\x509\certificate_transparency.py", line 11, in <module>
    from cryptography.hazmat.bindings._rust import x509 as rust_x509
ImportError: DLL load failed while importing _rust: The specified procedure could not be found.

This only occurs with cryptography-42.0.1, but not with cryptography-41.0.7.

Versions used:

• OS = Win10
• python 3.9.0 x64
• pip 23.3.2
• setuptools 69.0.3
• cffi 1.16.0

Installed cryptography through pip.

[reaperhulk]

Does this occur in a brand new venv?

[platinops]

Had not tried it yet, but yes, the following shows the same error:

python -m venv .venv
.venv/scripts/activate
python -m pip install pip --upgrade
pip install cryptography
python -c "from cryptography import x509"

Installed packages:

>>> pip list

Package      Version
------------ -------
cffi         1.16.0
cryptography 42.0.2
pip          23.3.2
pycparser    2.21
setuptools   49.2.1

Then pip install setuptools --upgrade => still same issue.

>>> pip list

Package      Version
------------ -------
cffi         1.16.0
cryptography 42.0.2
pip          23.3.2
pycparser    2.21
setuptools   69.0.3

[alex]

Can you provide some more context on the operating system and python you're running on?

[platinops]

I'm running Win10 Enterprise version 10.0.19045 Build 19045 on a 64 bit virtual machine.

I downloaded the official Python 3.9.0 Windows installer from the Python website.

Any more info required?

[reaperhulk]

Hmm, I've been unable to replicate this with Python 3.12.1 (64-bit) or 3.9.13 (64-bit) on a Win11 64-bit VM.

[platinops]

I was able to replicate with Python 3.9.0+3.9.1 on Win11 64-bit. As from Python 3.9.2 the error no longer appears.

So upgrading Python 3.9 to the latest version solved my problem, thanks for the assist.