from PyQt5 import QtWidgets, QtGui
from PyQt5.QtWidgets import QWidget, QSizePolicy, QVBoxLayout, QMessageBox

def horiz_spacer():
    spacer = QWidget()
    spacer.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
    return spacer

def add_item_to_toolbox(toolbox, label, widget_list=[]):
    block = QWidget()
    block.setAccessibleName(label)
    block.setContentsMargins(0, 0, 0, 0)
    block.setLayout(QVBoxLayout())
    for w in widget_list:
        block.layout().addWidget(w)
    block.layout().addStretch()
    item = toolbox.addItem(block, label)
    return item