QBadgeWidget (removed)

Removed in v3

QBadgeWidget has been removed and replaced by QCustomBadge — a themed badge whose colour comes from a semantic variant (so it follows the light/dark theme), with new count and dot modes and an overlay helper. There is no import alias.

Update your imports and API:

# old (removed)
from Custom_Widgets.QBadgeWidget import QBadgeWidget
badge = QBadgeWidget(text="Error", background_color=QColor(231, 76, 60))

# new
from Custom_Widgets.QCustomBadge import QCustomBadge
badge = QCustomBadge("Error", variant="destructive")

See the v3 migration note for the full property/API map, and the QCustomBadge reference for the new widget.