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| """Set of functions for logging messages.""" | |
| import sys | |
| import warnings | |
| from typing import Optional, Type | |
| from gym.utils import colorize | |
| DEBUG = 10 | |
| INFO = 20 | |
| WARN = 30 | |
| ERROR = 40 | |
| DISABLED = 50 | |
| min_level = 30 | |
| # Ensure DeprecationWarning to be displayed (#2685, #3059) | |
| warnings.filterwarnings("once", "", DeprecationWarning, module=r"^gym\.") | |
| def set_level(level: int): | |
| """Set logging threshold on current logger.""" | |
| global min_level | |
| min_level = level | |
| def debug(msg: str, *args: object): | |
| """Logs a debug message to the user.""" | |
| if min_level <= DEBUG: | |
| print(f"DEBUG: {msg % args}", file=sys.stderr) | |
| def info(msg: str, *args: object): | |
| """Logs an info message to the user.""" | |
| if min_level <= INFO: | |
| print(f"INFO: {msg % args}", file=sys.stderr) | |
| def warn( | |
| msg: str, | |
| *args: object, | |
| category: Optional[Type[Warning]] = None, | |
| stacklevel: int = 1, | |
| ): | |
| """Raises a warning to the user if the min_level <= WARN. | |
| Args: | |
| msg: The message to warn the user | |
| *args: Additional information to warn the user | |
| category: The category of warning | |
| stacklevel: The stack level to raise to | |
| """ | |
| if min_level <= WARN: | |
| warnings.warn( | |
| colorize(f"WARN: {msg % args}", "yellow"), | |
| category=category, | |
| stacklevel=stacklevel + 1, | |
| ) | |
| def deprecation(msg: str, *args: object): | |
| """Logs a deprecation warning to users.""" | |
| warn(msg, *args, category=DeprecationWarning, stacklevel=2) | |
| def error(msg: str, *args: object): | |
| """Logs an error message if min_level <= ERROR in red on the sys.stderr.""" | |
| if min_level <= ERROR: | |
| print(colorize(f"ERROR: {msg % args}", "red"), file=sys.stderr) | |
| # DEPRECATED: | |
| setLevel = set_level | |