Class: QgsMessageLog¶

Interface for logging messages from QGIS in GUI independent way.

This class provides abstraction of a tabbed window for showing messages to the user. By default QgsMessageLogOutput will be used if not overridden with another message log creator function.

QGIS application uses QgsMessageLog class for logging messages in a dockable window for the user.

QgsMessageLog is not usually directly created, but rather accessed through QgsApplication.messageLog().

Class Hierarchy¶

Base classes¶

QObject

Static Methods

logMessage

Adds a message to the log instance (and creates it if necessary).

Signals

messageReceived

Emitted whenever the log receives a message which is not a Qgis.MessageLevel.Info level message and which has the notifyUser flag as True.

class qgis.core.QgsMessageLog[source]¶

Bases: QObject

static logMessage(message: str | None, tag: str | None = '', level: Qgis.MessageLevel = Qgis.MessageLevel.Warning, notifyUser: bool = True, file: str | None = __builtin_FILE(), function: str | None = __builtin_FUNCTION(), line: int = __builtin_LINE())[source]¶

Adds a message to the log instance (and creates it if necessary).

If notifyUser is True, then the message should be brought to the user’s attention by various UI hints. If it is False, the message should appear in logs silently. Note that log viewer implementations may only respect notification hints for certain message levels.

Parameters:

message (Optional[str])
tag (Optional[str] = '')
level (Qgis.MessageLevel = Qgis.MessageLevel.Warning)
notifyUser (bool = True)
file (Optional[str] = __builtin_FILE())
function (Optional[str] = __builtin_FUNCTION())
line (int = __builtin_LINE())

signal messageReceived(received: bool)[source]¶

Emitted whenever the log receives a message which is not a Qgis.MessageLevel.Info level message and which has the notifyUser flag as True.

If QgsMessageLogNotifyBlocker objects have been created then this signal may be temporarily suppressed.