How to use the pyflakes.messages.RedefinedInListComp function in pyflakes

if value.name in scope:
                break
        existing = scope.get(value.name)

        if existing and not self.differentForks(node, existing.source):

            parent_stmt = self.getParent(value.source)
            if isinstance(existing, Importation) and isinstance(parent_stmt, ast.For):
                self.report(messages.ImportShadowedByLoopVar,
                            node, value.name, existing.source)

            elif scope is self.scope:
                if (isinstance(parent_stmt, ast.comprehension) and
                        not isinstance(self.getParent(existing.source),
                                       (ast.For, ast.comprehension))):
                    self.report(messages.RedefinedInListComp,
                                node, value.name, existing.source)
                elif not existing.used and value.redefines(existing):
                    self.report(messages.RedefinedWhileUnused,
                                node, value.name, existing.source)

            elif isinstance(existing, Importation) and value.redefines(existing):
                existing.redefined.append(node)

        if value.name in self.scope:
            # then assume the rebound name is used as a global or within a loop
            value.used = self.scope[value.name].used

        self.scope[value.name] = value

def my_report(self, messageClass, *args, **kwargs):
    if pym.UndefinedName == messageClass:
        message = messageClass(self.filename, *args, **kwargs)
        self.undefined_names.append(message.to_list())
    elif pym.UnusedImport == messageClass:
        if self.filename not in IGNORE_FILES:
            message = messageClass(self.filename, *args, **kwargs)
            self.unused_imports.append(message.to_list())
    elif pym.UnusedVariable == messageClass:
        message = messageClass(self.filename, *args, **kwargs)
        self.unused_var.append(message.to_list())
    elif pym.RedefinedInListComp == messageClass:
        message = messageClass(self.filename, *args, **kwargs)
        self.shadowed_var.append(message.to_list())
    elif pym.RedefinedWhileUnused == messageClass:
        message = messageClass(self.filename, *args, **kwargs)
        self.dublicated_funcs.append(message.to_list())
    else:
        if self.filename not in IGNORE_FILES:
            print(messageClass(self.filename, *args, **kwargs))
            ERRORS[str(messageClass)] = messageClass(self.filename, *args, **kwargs).to_list()

if value.name in scope:
                break
        existing = scope.get(value.name)

        if existing and not self.differentForks(node, existing.source):

            parent_stmt = self.getParent(value.source)
            if isinstance(existing, Importation) and isinstance(parent_stmt, ast.For):
                self.report(messages.ImportShadowedByLoopVar,
                            node, value.name, existing.source)

            elif scope is self.scope:
                if (isinstance(parent_stmt, ast.comprehension) and
                        not isinstance(self.getParent(existing.source),
                                       (ast.For, ast.comprehension))):
                    self.report(messages.RedefinedInListComp,
                                node, value.name, existing.source)
                elif not existing.used and value.redefines(existing):
                    self.report(messages.RedefinedWhileUnused,
                                node, value.name, existing.source)

            elif isinstance(existing, Importation) and value.redefines(existing):
                existing.redefined.append(node)

        if value.name in self.scope:
            # then assume the rebound name is used as a global or within a loop
            value.used = self.scope[value.name].used

        self.scope[value.name] = value

break
        existing = scope.get(value.name)

        if (existing and not isinstance(existing, Builtin) and
                not self.differentForks(node, existing.source)):

            parent_stmt = self.getParent(value.source)
            if isinstance(existing, Importation) and isinstance(parent_stmt, FOR_TYPES):
                self.report(messages.ImportShadowedByLoopVar,
                            node, value.name, existing.source)

            elif scope is self.scope:
                if (isinstance(parent_stmt, ast.comprehension) and
                        not isinstance(self.getParent(existing.source),
                                       (FOR_TYPES, ast.comprehension))):
                    self.report(messages.RedefinedInListComp,
                                node, value.name, existing.source)
                elif not existing.used and value.redefines(existing):
                    if value.name != '_' or isinstance(existing, Importation):
                        if not is_typing_overload(existing, self.scopeStack):
                            self.report(messages.RedefinedWhileUnused,
                                        node, value.name, existing.source)

            elif isinstance(existing, Importation) and value.redefines(existing):
                existing.redefined.append(node)

        if value.name in self.scope:
            # then assume the rebound name is used as a global or within a loop
            value.used = self.scope[value.name].used

        self.scope[value.name] = value

if value.name in scope:
                break
        existing = scope.get(value.name)

        if existing and not self.differentForks(node, existing.source):

            parent_stmt = self.getParent(value.source)
            if isinstance(existing, Importation) and isinstance(parent_stmt, ast.For):
                self.report(messages.ImportShadowedByLoopVar,
                            node, value.name, existing.source)

            elif scope is self.scope:
                if (isinstance(parent_stmt, ast.comprehension) and
                        not isinstance(self.getParent(existing.source),
                                       (ast.For, ast.comprehension))):
                    self.report(messages.RedefinedInListComp,
                                node, value.name, existing.source)
                elif not existing.used and value.redefines(existing):
                    if value.name != '_' or isinstance(existing, Importation):
                        self.report(messages.RedefinedWhileUnused,
                                    node, value.name, existing.source)

            elif isinstance(existing, Importation) and value.redefines(existing):
                existing.redefined.append(node)

        if value.name in self.scope:
            # then assume the rebound name is used as a global or within a loop
            value.used = self.scope[value.name].used

        self.scope[value.name] = value

if value.name in scope:
                break
        existing = scope.get(value.name)

        if existing and not self.differentForks(node, existing.source):

            parent_stmt = self.getParent(value.source)
            if isinstance(existing, Importation) and isinstance(parent_stmt, ast.For):
                self.report(messages.ImportShadowedByLoopVar,
                            node, value.name, existing.source)

            elif scope is self.scope:
                if (isinstance(parent_stmt, ast.comprehension) and
                        not isinstance(self.getParent(existing.source),
                                       (ast.For, ast.comprehension))):
                    self.report(messages.RedefinedInListComp,
                                node, value.name, existing.source)
                elif not existing.used and value.redefines(existing):
                    self.report(messages.RedefinedWhileUnused,
                                node, value.name, existing.source)

            elif isinstance(existing, Importation) and value.redefines(existing):
                existing.redefined.append(node)

        if value.name in self.scope:
            # then assume the rebound name is used as a global or within a loop
            value.used = self.scope[value.name].used

        self.scope[value.name] = value

if (isinstance(existing, Importation)
                        and not existing.used
                        and (not isinstance(value, Importation) or
                             value.fullName == existing.fullName)
                        and reportRedef
                        and not self.differentForks(node, existing.source)):
                    redefinedWhileUnused = True
                    self.report(messages.RedefinedWhileUnused,
                                node, value.name, existing.source)

        existing = self.scope.get(value.name)
        if not redefinedWhileUnused and self.hasParent(value.source, ast.ListComp):
            if (existing and reportRedef
                    and not self.hasParent(existing.source, (ast.For, ast.ListComp))
                    and not self.differentForks(node, existing.source)):
                self.report(messages.RedefinedInListComp,
                            node, value.name, existing.source)

        if (isinstance(existing, Definition)
                and not existing.used
                and not self.differentForks(node, existing.source)):
            self.report(messages.RedefinedWhileUnused,
                        node, value.name, existing.source)
        else:
            self.scope[value.name] = value