python - 加入由分隔符分隔的python列表中的项目

Question

<分区>

Answer 1

使用生成器函数；这让您可以控制项目何时“完成”以产生:

def join_unescaped(it):
    tojoin = []
    for element in it:
        if element.startswith('>'):
            if tojoin:
                yield ''.join(tojoin)
                tojoin = []
            yield element
        else:
            tojoin.append(element)
    if tojoin:
        yield ''.join(tojoin)

要根据您的输入生成一个新列表，将生成的生成器对象传递给 list() 函数:

result = list(join_unescaped(list_1))

演示:

>>> list_1 = ['>name', 'aaa', 'bbb', '>name_1', 'ccc', '>name_2', 'ddd', 'eee', 'fff']
>>> def join_unescaped(it):
...     tojoin = []
...     for element in it:
...         if element.startswith('>'):
...             if tojoin:
...                 yield ''.join(tojoin)
...                 tojoin = []
...             yield element
...         else:
...             tojoin.append(element)
...     if tojoin:
...         yield ''.join(tojoin)
... 
>>> list(join_unescaped(list_1))
['>name', 'aaabbb', '>name_1', 'ccc', '>name_2', 'dddeeefff']