Getting readable message level of Qgis.MessageLevel

Question

I have an instance of https://qgis.org/pyqgis/master/core/Qgis.html#qgis.core.Qgis.MessageLevel, e.g.

level = Qgis.Info

I want to get a human-readable string like "Info" or "Qgis.Info" from this object.

• print(level) prints 0
str(level) returns 0
• type(level) returns <class 'qgis._core.Qgis.MessageLevel'>

Is there a straightforward way to get a human-readable string representation of the MessageLevel object's level?

I am not looking for an if clause checking the integer value against the known values but if that is all that would be possible, a explanatory and canonical "no" would be a good answer.

Answer 1

As far as I am aware PyQt does not support iteration over names/values of Qt's enum types as you could do with standard python enums.

Instead, you can get information on the enumerator via the staticMetaObject of the class which contains the enum. In this case Qgis.

idx = Qgis.staticMetaObject.indexOfEnumerator(Qgis.MessageLevel.__name__)
name = Qgis.staticMetaObject.enumerator(idx).valueToKey(Qgis.Info)

print(name) # prints 'Info'

Answer 2

They are a few functions having displayString in their name to convert an enum item to a "display string".

Like https://api.qgis.org/api/classQgsWkbTypes.html#a74a5669aeb2975d4079656202c5ed5d9

For MessageLevel, there isn't any such function in https://api.qgis.org/api/classQgis.html or other classes, as I could checked.

So no, it's not possible AFAIK with the QGIS API. Maybe someone will come with a deeper core Python function with the inspection module ?

Answer 3

With pure Python, you can do introspection and create your own useful translator :

from qgis.core import Qgis

message_levels = {
    getattr(Qgis, i): i for i in dir(Qgis)
    if isinstance(getattr(Qgis, i), Qgis.MessageLevel)
}
# {0: 'Info', 1: 'Warning', 2: 'Critical', 3: 'Success', 4: 'NoLevel'}

So, in your usecase :

from qgis.core import Qgis

level = Qgis.Info
print(message_levels[level])
# >>> Info