# Functions
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LineNo 返回调用此函数的代码所在函数、文件、行号.
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New creates a new Logger.
# Constants
the date in the local time zone: 2009/01/23.
log levels.
These flags define which text to prefix to each log entry generated by the Logger.
log levels.
log levels.
log levels.
level: 0(Debug), 1(Info), 2(Warn), 3(Error), 4(Panic), 5(Fatal),6(Off).
full file name and line number: /a/b/c/d.go:23.
microsecond resolution: 01:23:23.123123.
log levels.
log levels.
final file name element and line number: d.go:23.
initial values for the standard logger.
the time in the local time zone: 01:23:23.
log levels.
# Structs
A Logger represents an active logging object that generates lines of output to an io.Writer.
# Type aliases
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