python - 如何合并字符串列表成为一个

Question

我正在尝试在python中合并两个字符串列表，例如：

['this','is','list one'] ,['and','list two','combined']

成为一个清单。

"+" and "join".

对我不起作用

原始代码：

 for word in passwordslist:
    frequencyList+=[word[x:x+N] for x in xrange(len(word)-N+1)]

（尝试收集所有N-gram的字符串密码列表）

Answer 1

初始化列表？

frequencyList = []
for word in passwordslist:
    frequencyList += [word[x:x+N] for x in xrange(len(word)-N+1)]

你也可以把它写成一个理解：

frequencyList = [
    word[x:x+N]
    for word in passwordslist
    for x in xrange(len(word)-N+1)
]

Answer 2

>>> first_list = ['this', 'is', 'list one']
>>> second_list = ['and', 'list two', 'combined']
>>> first_list.extend(second_list)
>>> print first_list
['this', 'is', 'list one', 'and', 'list two', 'combined']