Library Logging

A library SHOULD NOT append a handler to logging.

Pros

• Library is unobtrusive; i.e. it doesn't interfere with higher-level application logging

Cons

• Client must append handler of pre-determined name
• If no handler is appended, errors are thrown

A library SHOULD append a handler to logging.

Pros

• Library reports relevant messages
• Handler can be accessed via logging.getLogger(<name>)

Cons

• With many libraries, logging may be substantial

Libraries

Libraries that do provide handlers out of the box.

• Flask