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sanelogger.py
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sanelogger.py
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from termcolor import cprint
from datetime import datetime
import sys
class SaneLogger(object):
OFF = 1
FATAL = 2
ERROR = 4
WARN = 8
INFO = 16
DEBUG = 32
TRACE = 64
ALL = 64
# ALL = FATAL + ERROR + INFO + WARN + DEBUG + TRACE
__global_instance = None
__global_level = None
def __init__(self, name="", level="ALL", frmt: str = None, write_to_file=False, out_file=None):
self.name = name
self.frmt = frmt
self.level = None
self.write_to_file = write_to_file
self.out_file = out_file
self.set_level(level)
self.out_file_hook = None
self.show_caller_in_trace = True
if write_to_file:
if out_file is None:
# USE DEFAULT FILE OUTPUT
self.out_file = 'sane.log'
if frmt is None:
if name == "":
self.set_format("{level}: {message}")
else:
self.set_format("{level}({name}): {message}")
self.frmt_with_caller = "{level}({name}->{caller}): {message}"
def build_message(self, level, message):
new_format = self.frmt
if level == self.TRACE and self.show_caller_in_trace:
caller = self.__get_caller(3)
new_format = self.frmt_with_caller.replace('{caller}', caller)
if level is None:
out_msg = message
else:
out_msg = new_format.replace(
"{name}", self.name).replace("{level}", SaneLogger.level_name(level)).replace("{message}", str(message))
self.__write_to_file('[{}] {}\n'.format(datetime.utcnow(), out_msg))
return out_msg
def __write_to_file(self, content):
if self.write_to_file:
with open(self.out_file, 'a') as f:
f.write(content)
def __get_caller(self, frame):
return sys._getframe(frame).f_code.co_name
@staticmethod
def set_global_level(level):
if isinstance(level, str):
SaneLogger.__global_level = SaneLogger.level_value(level.upper())
else:
SaneLogger.__global_level = level
return level
@staticmethod
def unset_global_level():
SaneLogger.__global_level = None
@staticmethod
def global_logger(name="GLOBAL", level="ALL", frmt=None):
if SaneLogger.__global_instance is None:
def_logger = SaneLogger(name, level, frmt)
SaneLogger.__global_instance = def_logger
return def_logger
return SaneLogger.__global_instance
@staticmethod
def level_name(level):
if level == SaneLogger.OFF:
return "OFF"
if level == SaneLogger.TRACE:
return "TRACE"
if level == SaneLogger.DEBUG:
return "DEBUG"
if level == SaneLogger.WARN:
return "WARN"
if level == SaneLogger.INFO:
return "INFO"
if level == SaneLogger.ERROR:
return "ERROR"
if level == SaneLogger.FATAL:
return "FATAL"
return "ALL"
@staticmethod
def level_value(level):
level = level.upper()
if level == "OFF":
return SaneLogger.OFF
if level == "TRACE":
return SaneLogger.TRACE
if level == "DEBUG":
return SaneLogger.DEBUG
if level == "WARN":
return SaneLogger.WARN
if level == "INFO":
return SaneLogger.INFO
if level == "ERROR":
return SaneLogger.ERROR
if level == "FATAL":
return SaneLogger.FATAL
return SaneLogger.ALL
def demo(self):
self.fatal('Fatal message')
self.trace('Trace message')
self.error('Error message')
self.warn('Warning message')
self.debug('Debug message')
self.info('Info message')
self('Regular message')
def set_level(self, level):
if isinstance(level, str):
self.level = self.level_value(level.upper())
else:
self.level = level
return level
def set_format(self, frmt):
self.frmt = frmt
def trace(self, message=None):
if message is None:
message = 'is called'
if SaneLogger.__global_level:
local_level = SaneLogger.__global_level
else:
local_level = self.level
if local_level >= self.TRACE:
print(self.build_message(self.TRACE, message))
def debug(self, message):
if SaneLogger.__global_level:
local_level = SaneLogger.__global_level
else:
local_level = self.level
if local_level >= self.DEBUG:
cprint(self.build_message(self.DEBUG, message), color='magenta')
def info(self, message):
if SaneLogger.__global_level:
local_level = SaneLogger.__global_level
else:
local_level = self.level
if local_level >= self.INFO:
cprint(self.build_message(self.INFO, message), color='green')
def warn(self, message):
if SaneLogger.__global_level:
local_level = SaneLogger.__global_level
else:
local_level = self.level
if local_level >= self.WARN:
cprint(self.build_message(self.WARN, message), color='yellow')
def error(self, message):
if SaneLogger.__global_level:
local_level = SaneLogger.__global_level
else:
local_level = self.level
if local_level >= self.ERROR:
cprint(self.build_message(self.ERROR, message), color='red')
def fatal(self, message):
if SaneLogger.__global_level:
local_level = SaneLogger.__global_level
else:
local_level = self.level
if local_level >= self.FATAL:
cprint(self.build_message(self.FATAL, message), color='grey', on_color='on_red')
@staticmethod
def pos(message):
cprint('{}'.format(message), color='cyan')
@staticmethod
def neg(message):
cprint('{}'.format(message), color='red')
def __call__(self, message):
msg = self.build_message(None, message)
print('{}'.format(msg))
if __name__ == '__main__':
log1 = SaneLogger()
for i in range(8):
level1 = 2 ** i
log1.set_level(level1)
print("==== Level set to " + log1.level_name(log1.level))
log1.trace("This is an trace message")
log1.debug("This is an debug message")
log1.info("This is an info message")
log1.warn("This is a warning message")
log1.error("This is en error message")
log1.fatal("This is a fatal message")
print('--- Following messages are not based on log level. They will always be printed.')
log1('This is a regular message')
log1.pos('This is a positive message')
log1.neg('This is a negative message')