Jwt, cryptography, cffi

Compiling or Editing the Panda Source
1

Hello ,I am using a jwt module in my project.And after compiling I 've got this error:

File "C:\Panda3D-1.10.5-x64\0PROJECTS\mayn_may\gs.py", line 39, in __getSignedJwt
    return jwt.encode(payload, self.pkey, algorithm='RS256')
  File "C:\Panda3D-1.10.5-x64\0PROJECTS\mayn_may\build\__whl_cache__\PyJWT-1.7.1-py2.py3-none-any.whl\jwt\api_jwt.py", line 65, in encode
  File "C:\Panda3D-1.10.5-x64\0PROJECTS\mayn_may\build\__whl_cache__\PyJWT-1.7.1-py2.py3-none-any.whl\jwt\api_jws.py", line 113, in encode
  File "C:\Panda3D-1.10.5-x64\0PROJECTS\mayn_may\build\__whl_cache__\PyJWT-1.7.1-py2.py3-none-any.whl\jwt\algorithms.py", line 205, in prepare_key
  File "C:\Panda3D-1.10.5-x64\python\lib\site-packages\cryptography\hazmat\backends\__init__.py", line 15, in default_backend
    from cryptography.hazmat.backends.openssl.backend import backend
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 983, in _find_and_load
    return _find_and_load_unlocked(name, import_)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 953, in _find_and_load_unlocked
    _call_with_frames_removed(import_, parent)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 219, in _call_with_frames_removed
    return f(*args, **kwds)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 983, in _find_and_load
    return _find_and_load_unlocked(name, import_)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 967, in _find_and_load_unlocked
    module = _load_unlocked(spec)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 677, in _load_unlocked
    spec.loader.exec_module(module)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 819, in exec_module
    exec(code, module.__dict__)
  File "C:\Panda3D-1.10.5-x64\python\lib\site-packages\cryptography\hazmat\backends\openssl\__init__.py", line 7, in <module>
    from cryptography.hazmat.backends.openssl.backend import backend
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 983, in _find_and_load
    return _find_and_load_unlocked(name, import_)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 967, in _find_and_load_unlocked
    module = _load_unlocked(spec)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 677, in _load_unlocked
    spec.loader.exec_module(module)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 819, in exec_module
    exec(code, module.__dict__)
  File "C:\Panda3D-1.10.5-x64\python\lib\site-packages\cryptography\hazmat\backends\openssl\backend.py", line 16, in <module>
    from cryptography import utils, x509
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 1035, in _handle_fromlist
    _call_with_frames_removed(import_, from_name)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 219, in _call_with_frames_removed
    return f(*args, **kwds)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 983, in _find_and_load
    return _find_and_load_unlocked(name, import_)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 967, in _find_and_load_unlocked
    module = _load_unlocked(spec)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 677, in _load_unlocked
    spec.loader.exec_module(module)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 819, in exec_module
    exec(code, module.__dict__)
  File "C:\Panda3D-1.10.5-x64\python\lib\site-packages\cryptography\x509\__init__.py", line 8, in <module>
    from cryptography.x509.base import (
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 983, in _find_and_load
    return _find_and_load_unlocked(name, import_)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 967, in _find_and_load_unlocked
    module = _load_unlocked(spec)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 677, in _load_unlocked
    spec.loader.exec_module(module)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 819, in exec_module
    exec(code, module.__dict__)
  File "C:\Panda3D-1.10.5-x64\python\lib\site-packages\cryptography\x509\base.py", line 18, in <module>
    from cryptography.x509.extensions import Extension, ExtensionType
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 983, in _find_and_load
    return _find_and_load_unlocked(name, import_)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 967, in _find_and_load_unlocked
    module = _load_unlocked(spec)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 677, in _load_unlocked
    spec.loader.exec_module(module)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 819, in exec_module
    exec(code, module.__dict__)
  File "C:\Panda3D-1.10.5-x64\python\lib\site-packages\cryptography\x509\extensions.py", line 20, in <module>
    from cryptography.hazmat.primitives import constant_time, serialization
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 1035, in _handle_fromlist
    _call_with_frames_removed(import_, from_name)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 219, in _call_with_frames_removed
    return f(*args, **kwds)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 983, in _find_and_load
    return _find_and_load_unlocked(name, import_)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 967, in _find_and_load_unlocked
    module = _load_unlocked(spec)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 677, in _load_unlocked
    spec.loader.exec_module(module)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 819, in exec_module
    exec(code, module.__dict__)
  File "C:\Panda3D-1.10.5-x64\python\lib\site-packages\cryptography\hazmat\primitives\constant_time.py", line 11, in <module>
    from cryptography.hazmat.bindings._constant_time import lib
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 983, in _find_and_load
    return _find_and_load_unlocked(name, import_)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 967, in _find_and_load_unlocked
    module = _load_unlocked(spec)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 677, in _load_unlocked
    spec.loader.exec_module(module)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 819, in exec_module
    exec(code, module.__dict__)
  File "cryptography.hazmat.bindings._constant_time", line 1, in <module>
  File "C:\Panda3D-1.10.5-x64\python\lib\imp.py", line 342, in load_dynamic
    return _load(spec)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 696, in _load
    return _load_unlocked(spec)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 670, in _load_unlocked
    module = module_from_spec(spec)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 583, in module_from_spec
    module = spec.loader.create_module(spec)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap_external.py", line 1043, in create_module
    _imp.create_dynamic, spec)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 219, in _call_with_frames_removed
    return f(*args, **kwds)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 983, in _find_and_load
    return _find_and_load_unlocked(name, import_)
  File "C:\Panda3D-1.10.5-x64\python\lib\importlib\_bootstrap.py", line 965, in _find_and_load_unlocked
    raise ModuleNotFoundError(_ERR_MSG.format(name), name=name)
ModuleNotFoundError: No module named '_cffi_backend'

Help me please!

2

Try adding an explicit import to _cffi_backend to your code to force it to be included. I also recommend upgrading to Panda3D 1.10.6.

3

@Falcon, was just the one import for _cffi_backend sufficient to get things running for you? The PyInstaller hook suggests there are more hidden imports to deal with along with some package data that needs to be manipulated.

4

Actually the mistake was not only in setup.py but also in requerements.txt, plus I added import _ssl in setup.py

 'include_modules':{
'Game':['_cffi_backend','_ssl']
}