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"""Customize logging
Defines custom logger class for the `logger.verbose(...)` method.
init_logging() must be called before any other modules that call logging.getLogger.
"""
import logging
from typing import Any, cast
# custom log level for `--verbose` output
# between DEBUG and INFO
VERBOSE = 15
class VerboseLogger(logging.Logger):
"""Custom Logger, defining a verbose log-level
VERBOSE is between INFO and DEBUG.
"""
def verbose(self, msg: str, *args: Any, **kwargs: Any) -> None:
return self.log(VERBOSE, msg, *args, **kwargs)
def getLogger(name: str) -> VerboseLogger:
"""logging.getLogger, but ensures our VerboseLogger class is returned"""
return cast(VerboseLogger, logging.getLogger(name))
def init_logging() -> None:
"""Register our VerboseLogger and VERBOSE log level.
Should be called before any calls to getLogger(),
i.e. in pip._internal.__init__
"""
logging.setLoggerClass(VerboseLogger)
logging.addLevelName(VERBOSE, "VERBOSE")
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