SCP37: Unpicklable setting value

What it does

Reports a lambda or generator expression being used in a setting value.

Why is this bad?

Settings must be picklable.

Example

settings.py

FEED_URI_PARAMS = lambda params, spider: {}

Instead use:

settings.py

def feed_uri_params(params, spider):
    return {}


FEED_URI_PARAMS = feed_uri_params