Python | 2つのリストを結合する方法

iPython

>>> company = ['test1', 'test2', 'test3']
>>> company2 = ['test4', 'test5', 'test0']
>>> company + company2
['test1', 'test2', 'test3', 'test4', 'test5', 'test0']
>>>
>>> company.extend(company2)
>>> company
['test1', 'test2', 'test3', 'test4', 'test5', 'test0']