"'NoneType' object is not callable" when running on Lambda

I’m trying to get this to successfully run in an AWS Lambda function and keep getting the error:

Traceback (most recent call last):
  File "handler.py", line 27, in <module>
    rsa_private_key_passphrase = boxPrivateKeyPassphrase
TypeError: 'NoneType' object is not callable

The area where it’s failing is:

    enterpriseAuth = JWTAuth(
        client_id=boxClientId,
        client_secret=boxClientSecret,
        enterprise_id=boxEnterpriseId,
        jwt_key_id=boxJwtKeyId,
        rsa_private_key_file_sys_path=boxPrivateKeyPath,
        rsa_private_key_passphrase=boxPrivateKeyPassphrase
    )

I could duplicate it on an EC2 instance with modules packaged with the script in a vendored directory.

.
├── boxsdk
│   ├── auth
│   ├── client
│   ├── network
│   ├── object
│   ├── session
│   └── util
├── boxsdk-1.5.3.dist-info
├── enum
├── enum34-1.1.6.dist-info
├── idna
├── idna-2.1.dist-info
├── ipaddress-1.0.16.dist-info
├── jwt
│   └── contrib
├── pkg_resources
│   ├── extern
│   └── _vendor
├── pyasn1
│   ├── codec
│   ├── compat
│   └── type
├── pyasn1-0.1.9.dist-info
├── pycparser
│   └── ply
├── pycparser-2.14.egg-info
├── PyJWT-1.4.0.dist-info
├── requests
│   └── packages
├── requests-2.10.0.dist-info
├── requests_toolbelt
│   ├── adapters
│   ├── auth
│   ├── cookies
│   ├── downloadutils
│   ├── multipart
│   ├── threaded
│   └── utils
├── requests_toolbelt-0.6.2.dist-info
├── setuptools
│   ├── command
│   └── extern
├── setuptools-24.0.2.dist-info
└── six-1.10.0.dist-info

The only way to get it to work on EC2 is by sudo pip install boxsdk[jwt] on the system packages after installing a number of dependencies like libffi-devel, gcc and openssl-devel.

So does anyone know what’s missing that I could bundle with the function into Lambda in order to get this working?

[jmoldow]

See https://github.com/box/box-python-sdk/blob/master/boxsdk/auth/__init__.py#L10 .

JWTAuth is only defined if its dependencies are available (which you get with pip install boxsdk[jwt]). If you’re using a Python virtualenv, you should make sure these dependencies are installed into your virtualenv with pip. If you’re running directly with the system’s python, you’ll need sudo pip.

Compiling the cryptography dependency on Linux does require libffi-devel, gcc and openssl-devel: https://github.com/pyca/cryptography/blob/master/docs/installation.rst#building-cryptography-on-linux

I don’t know anything about Lambda, so I don’t know what would be different about getting it to work on Lambda, as opposed to EC2. In the directory tree you posted, I don’t see cryptography, which is probably why JWTAuth isn’t able to be imported and defined.

[GelosSnake]

was the issue solved? I’m getting this error as well. Here is my tree, did both boxsdk[jwt] and cryptography. Everything was compiled on AmazonLinux docker.

. ├── asn1crypto │   └── _perf ├── asn1crypto-0.24.0.dist-info ├── bin ├── boxsdk │   ├── auth │   ├── client │   ├── network │   ├── object │   ├── session │   └── util ├── boxsdk-1.5.5.dist-info ├── certifi ├── certifi-2018.4.16.dist-info ├── cffi ├── cffi-1.11.5.dist-info ├── chardet │   └── cli ├── chardet-3.0.4.dist-info ├── cryptography │   ├── hazmat │   │   ├── backends │   │   │   └── openssl │   │   ├── bindings │   │   │   └── openssl │   │   └── primitives │   │   ├── asymmetric │   │   ├── ciphers │   │   ├── kdf │   │   └── twofactor │   └── x509 ├── cryptography-2.2.2.dist-info ├── enum ├── enum34-1.1.6.dist-info ├── idna ├── idna-2.6.dist-info ├── ikpdb-1.2.3.dist-info ├── ipaddress-1.0.22.dist-info ├── pycparser │   └── ply ├── pycparser-2.18.dist-info ├── requests ├── requests-2.18.4.dist-info ├── requests_toolbelt │   ├── adapters │   ├── auth │   ├── cookies │   ├── downloadutils │   ├── multipart │   ├── threaded │   └── utils ├── requests_toolbelt-0.8.0.dist-info ├── six-1.11.0.dist-info ├── urllib3 │   ├── contrib │   │   └── _securetransport │   ├── packages │   │   ├── backports │   │   └── ssl_match_hostname │   └── util └── urllib3-1.22.dist-info

Any idea?