sta ack res fill app either ant odin base

logging.getLogger(name=None)
Return a logger with the specified name or, if name is None, return a logger which is the root logger of the hierarchy.
If specified, the name is typically a dot-separated hierarchical name like ‘a’, ‘a.b’.
All calls to this function with a given name return the same logger instance

.
This means that logger instances never need to be passed between different parts of an application

RotatingFileHandler(filename, mode=‘a‘, maxBytes=0, backupCount=0, encoding=None, delay=False)
but if either of maxBytes or backupCount is zero, rollover never occurs,
so you generally want to set backupCount to at least 1, and have a non-zero maxBytes.
For example, with a backupCount of 5 and a base file name of app.log,
you would get app.log, app.log.1, app.log.2, up to app.log.5. The file being written to is always app.log

.
When this file is filled, it is closed and renamed to app.log.1,
and if files app.log.1, app.log.2, etc. exist, then they are renamed to app.log.2, app.log.3 etc. respectively.

python3 之logging模塊