ModuleNotFoundError: No module named '_cffi_backend'

[woodpecker02]

Hello @ALL,

my PIP - Version List:

pip freeze
altgraph==0.17
bcrypt==3.1.7
certifi==2019.11.28
cffi==1.13.2
chardet==3.0.4
ciscoconfparse==1.4.11
colorama==0.4.3
cryptography==2.8
cx-Freeze==6.1
dnspython==1.16.0
future==0.18.2
idna==2.8
Jinja2==2.11.1
junos-eznc==2.2.1
lxml==4.5.0
macholib==1.14
MarkupSafe==1.1.1
napalm==2.5.0
ncclient==0.6.7
netaddr==0.7.19
netmiko==2.4.2
nxapi-plumbing==0.5.2
paramiko==2.7.1
passlib==1.7.2
pefile==2019.4.18
pycparser==2.19
pyeapi==0.8.3
PyInstaller==3.6
pyIOSXR==0.53
PyNaCl==1.3.0
pyparsing==2.4.6
pyserial==3.4
pywin32-ctypes==0.2.0
PyYAML==5.3
requests==2.22.0
scp==0.13.2
six==1.14.0
textfsm==1.1.0
transitions==0.7.2
urllib3==1.25.8
yamlordereddictloader==0.4.0

python 3.7

when i create my exe-file with cx_Freeze, i got the following Module error:

Traceback (most recent call last):
File "C:\Users\ms\AppData\Local\Programs\Python\Python37\lib\site-packages\cx_Freeze\initscripts_startup_.py", line 40, in run
module.run()
File "C:\Users\ms\AppData\Local\Programs\Python\Python37\lib\site-packages\cx_Freeze\initscripts\Console.py", line 37, in run
exec(code, {'name': 'main'})
File "change_if_description.py", line 10, in
File "C:\Users\ms\AppData\Local\Programs\Python\Python37\lib\site-packages\napalm_init_.py", line 3, in
from napalm.base import get_network_driver
File "C:\Users\ms\AppData\Local\Programs\Python\Python37\lib\site-packages\napalm\base_init_.py", line 27, in
from napalm.base.base import NetworkDriver
File "C:\Users\ms\AppData\Local\Programs\Python\Python37\lib\site-packages\napalm\base\base.py", line 21, in
from netmiko import ConnectHandler, NetMikoTimeoutException
File "C:\Users\ms\AppData\Local\Programs\Python\Python37\lib\site-packages\netmiko_init_.py", line 8, in
from netmiko.ssh_dispatcher import ConnectHandler
File "C:\Users\ms\AppData\Local\Programs\Python\Python37\lib\site-packages\netmiko\ssh_dispatcher.py", line 4, in
from netmiko.a10 import A10SSH
File "C:\Users\ms\AppData\Local\Programs\Python\Python37\lib\site-packages\netmiko\a10_init_.py", line 2, in
from netmiko.a10.a10_ssh import A10SSH
File "C:\Users\ms\AppData\Local\Programs\Python\Python37\lib\site-packages\netmiko\a10\a10_ssh.py", line 4, in
from netmiko.cisco_base_connection import CiscoSSHConnection
File "C:\Users\ms\AppData\Local\Programs\Python\Python37\lib\site-packages\netmiko\cisco_base_connection.py", line 3, in
from netmiko.base_connection import BaseConnection
File "C:\Users\ms\AppData\Local\Programs\Python\Python37\lib\site-packages\netmiko\base_connection.py", line 22, in
import paramiko
File "C:\Users\ms\AppData\Local\Programs\Python\Python37\lib\site-packages\paramiko_init_.py", line 22, in
from paramiko.transport import SecurityOptions, Transport
File "C:\Users\ms\AppData\Local\Programs\Python\Python37\lib\site-packages\paramiko\transport.py", line 89, in
from paramiko.dsskey import DSSKey
File "C:\Users\ms\AppData\Local\Programs\Python\Python37\lib\site-packages\paramiko\dsskey.py", line 37, in
from paramiko.pkey import PKey
File "C:\Users\ms\AppData\Local\Programs\Python\Python37\lib\site-packages\paramiko\pkey.py", line 31, in
import bcrypt
File "C:\Users\ms\AppData\Local\Programs\Python\Python37\lib\site-packages\bcrypt_init_.py", line 25, in
from . import _bcrypt
ModuleNotFoundError: No module named '_cffi_backend'

When i copy the file "_cffi_backend.cp37-win_amd64.pyd"from my python "site-packages" to my new exe/lib-dir everything works fine.

i hope this will help other!

Regards,
Mario

[marcelotduarte]

You can add the module '_cffi_backend' to the includes list.

from cx_Freeze import setup, Executable

build_options = {"includes": ["_cffi_backend"]}
executables = [Executable("test_crypt.py")]

setup(name='test_crypt',
      version='0.1',
      description='cx_Freeze script to test cryptography',
      executables=executables,
      options={"build_exe": build_options})

[alandmoore]

Hello, I'm still getting this error after adding _cffi_backend to includes. Same happens with the test setup above:

Traceback (most recent call last):
  File "/home/alanm/.local/lib/python3.9/site-packages/cx_Freeze/initscripts/__startup__.py", line 113, in run
    module_init.run(name + "__main__")
  File "/home/alanm/.local/lib/python3.9/site-packages/cx_Freeze/initscripts/Console.py", line 15, in run
    exec(code, module_main.__dict__)
  File "test_crypt.py", line 1, in <module>
  File "/usr/lib/python3.9/site-packages/paramiko/__init__.py", line 22, in <module>
    from paramiko.transport import SecurityOptions, Transport
  File "/usr/lib/python3.9/site-packages/paramiko/transport.py", line 89, in <module>
    from paramiko.dsskey import DSSKey
  File "/usr/lib/python3.9/site-packages/paramiko/dsskey.py", line 37, in <module>
    from paramiko.pkey import PKey
  File "/usr/lib/python3.9/site-packages/paramiko/pkey.py", line 31, in <module>
    import bcrypt
  File "/usr/lib/python3.9/site-packages/bcrypt/__init__.py", line 25, in <module>
    from . import _bcrypt  # type: ignore
ModuleNotFoundError: No module named '_cffi_backend'

I am using cx-freeze 6.8 from PyPI, Python 3.9 on arch linux 64-bit. I tried my build on Windows 10 and Ubuntu Linux and it succeeded.

[marcelotduarte]

The setup above isn't necessary anymore. See this sample: https://github.com/marcelotduarte/cx_Freeze/tree/main/cx_Freeze/samples/bcrypt

[alandmoore]

With or without the setup, I get the ModuleNotFoundError on arch.

[marcelotduarte]

Later I'll try in a docker. What are the versions of the libs used? bcrypt, cffi, etc

[alandmoore]

bcrypt == 3.2.0
cffi==1.14.6
paramiko == 2.7.2

I think these are the latest versions, which I have installed system-wide from the arch repos. I note that if I pip install these I get older versions from PyPI. Would explain why it works on Ubuntu and Windows, perhaps.