timeit('filter(None, str_list)', 'str_list=["a"]*1000', number=100000)
timeit('filter(bool, str_list)', 'str_list=["a"]*1000', number=100000)
timeit('filter(len, str_list)', 'str_list=["a"]*1000', number=100000)
timeit('[x for x in str_list if x]', 'str_list=["a"]*1000', number=100000)
timeit('filter(lambda item: item, str_list)', 'str_list=["a"]*1000', number
    =100000)
Remove empty strings from a list of strings