Logging

Mechanica has a detailed logging system. Many internal methods will log extensive details to either the clog (typically stderr) or a user specified file path. The logging system can be configured to log events at various levels of detail. All methods of the Logger are static, they are available immediately upon loading the Mechanica package.

To display logging at the lowest level (TRACE), where every logging message is displayed, is as simple as,

import mechanica as mx
mx.Logger.setLevel(mx.Logger.TRACE)

Enabling logging to terminal and disabling are also single commands,

mx.Logger.enableConsoleLogging(mx.Logger.DEBUG)
...
mx.Logger.disableConsoleLogging()

Messages can also be added to the log by logging level.

mx.Logger.log(mx.Logger.FATAL, "A fatal message. This is the highest priority.")
mx.Logger.log(mx.Logger.CRITICAL, "A critical message")
mx.Logger.log(mx.Logger.ERROR, "An error message")
mx.Logger.log(mx.Logger.WARNING, "A warning message")
mx.Logger.log(mx.Logger.NOTICE, "A notice message")
mx.Logger.log(mx.Logger.INFORMATION, "An informational message")
mx.Logger.log(mx.Logger.DEBUG, "A debugging message.")
mx.Logger.log(mx.Logger.TRACE,  "A tracing message. This is the lowest priority.")

mechanica.Logger: alias of mechanica.mechanica.MxLogger

class mechanica.MxLogger

The Mechanica logger.

A set of static method for setting the logging level.

static setLevel(level: int = 0) → void

Set the Level objectsets the logging level to one a value from Logger::Level

Parameters: level (int) – logging level

static getLevel() → int

Get the Level objectget the current logging level.

Return type: int
Returns: int

static disableLogging() → void: Suppresses all logging output

static enableConsoleLogging(level: int = 0) → void

turns on console logging at the given level.

Parameters: level (int) – logging level

static disableConsoleLogging() → void: stops logging to the console, but file logging may continue.

static enableFileLogging(*args, **kwargs) → void

turns on file logging to the given file as the given level.

If fileName is an empty string, then nothing occurs.

Parameters

fileName (string) – path to log file
level (int) – logging level

static disableFileLogging() → void: turns off file logging, but has no effect on console logging.

static getCurrentLevelAsString() → std::string

get the textural form of the current logging level.

Return type: string
Returns: std::string

static getFileName() → std::string

Get the File Name objectget the name of the currently used log file.

Return type: string
Returns: std::string

static levelToString(level: int) → std::string: gets the textual form of a logging level Enum for a given value.

static stringToLevel(str: std::string const &) → MxLogLevel: parses a string and returns a Logger::Level

static log(level: MxLogLevel, msg: std::string const &) → void

logs a message to the log.

Parameters

level (int) – logging level
msg (string) – log message