like the python logging.getLogger return an Gloabl-logger and save in the memory.

new a logger with specified handler and flag.

new a default logger with specified handler and flag: Ltime|Lfile|Llevel.

log level, from low to high, more high means more serious.

log level, from low to high, more high means more serious.

log level, from low to high, more high means more serious.

log level, from low to high, more high means more serious.

log level, from low to high, more high means more serious.

log level, from low to high, more high means more serious.

log level, from low to high, more high means more serious.

file.go:123.

[Trace|Debug|Info...].

time format "2006/01/02 15:04:05".

FileHandler writes log to a file.

NullHandler does nothing, it discards anything.

RotatingFileHandler writes log a file, if file size exceeds maxBytes, it will backup current file and open a new one.

SocketHandler writes log to a connectionl.Network protocol is simple: log length + log | log length + log.

StreamHandler writes logs to a specified io Writer, maybe stdout, stderr, etc...

TimeRotatingFileHandler writes log to a file, it will backup current and open a new one, with a period time you sepecified.

Handler writes logs to somewhere.