Add missing superclass Widget constructor calls

Author: inducer

pudb/source_view.py

@@ -34,6 +34,8 @@ class SourceLine(urwid.Widget):
     _sizing = frozenset([urwid.Sizing.FLOW])
 
     def __init__(self, dbg_ui, text, line_nr="", attr=None, has_breakpoint=False):
+        super().__init__()
+
         self.dbg_ui = dbg_ui
         self.text = text
         self.attr = attr

pudb/ui_tools.py

@@ -144,6 +144,8 @@ class StackFrame(urwid.Widget):
     _sizing = frozenset([urwid.Sizing.FLOW])
 
     def __init__(self, is_current, name, class_name, filename, line):
+        super().__init__()
+
         self.is_current = is_current
         self.name = name
         self.class_name = class_name
@@ -190,6 +192,8 @@ class BreakpointFrame(urwid.Widget):
     _sizing = frozenset([urwid.Sizing.FLOW])
 
     def __init__(self, is_current, filename, breakpoint):
+        super().__init__()
+
         self.is_current = is_current
         self.filename = filename
         self.breakpoint = breakpoint

pudb/var_view.py

@@ -219,6 +219,8 @@ class VariableWidget(urwid.Widget):
 
     def __init__(self, parent, var_label, value_str, id_path,
             attr_prefix=None, watch_expr=None, iinfo=None):
+        super().__init__()
+
         assert isinstance(id_path, str)
         self.parent = parent
         self.nesting_level = 0 if parent is None else parent.nesting_level + 1