SCP10: Incomplete project throttling

What it does

Reports a setting module (e.g. settings.py) where CONCURRENT_REQUESTS_PER_DOMAIN and DOWNLOAD_DELAY are not both set.

Why is this bad?

A Scrapy project should set sane defaults for throttling settings based on the kind of websites that it aims to scrape.

Additional, more granular adjustments can be made on a per-domain basis (DOWNLOAD_SLOTS) or on a per-spider basis (e.g. in custom_settings).

Example

CONCURRENT_REQUESTS_PER_DOMAIN = 1
DOWNLOAD_DELAY = 1.0