使用枚举在字符串元素列表的定义 re.match 间隔之间提取正则表达式

Question

我正在尝试从列表（许多元素）中提取单独的捕获组。有多个捕获组，但捕获组本身没有什么独特之处。

my_list = ['this is a test element 1', 'I need to capture **after** this element','capture1','capture2', 'capture3','.........', 'I need to capture **before** this element and separately after this element' , 'captureA', 'captureB','captureC', 'last capture ends before this element]
my_reg = re.compile(r'.*this element.*')

代码如下：

match_indices = [i for i, s in enumerate(my_list) if my_reg.match(s)]
captured_text = my_list[min(match_indices)+1 : max(match_indices)]

match_indices 给我每个匹配元素的列表位置和捕获的文本获取第一个和最后一个匹配之间位置的实际元素。

我无法获取捕获的文本以读取每个匹配位置之间的单独组。

例如输出为

Group1 = capture1capture2capture3

Group2 = captureAcaptureBcaptureC

而不是 capture1capture2capture3captureAcaptureBcaptureC 任何指导？谢谢

Answer 1

使用您的代码，returns

match_indices = [1, 6, 10]
captured_text = ['capture1', 'capture2', 'capture3', '.........', 'I need to capture **before** this element and separately after this element', 'captureA', 'captureB', 'captureC'] # all between 1 and 10

要捕获索引之间的组，您不能使用 min() 和 max()。而是迭代 match_indices 中的每对相邻索引。 captured_text 将 return 列表列表。

my_list = ['this is a test element 1', 
    'I need to capture **after** this element',
    'capture1',
    'capture2',
    'capture3',
    '.........', 
    'I need to capture **before** this element and separately after this element',
    'captureA',
    'captureB',
    'captureC',
    'last capture ends before this element']

match_indices = [i for i, s in enumerate(my_list) if 'this element' in s]
captured_text = []
for i in range(1, len(match_indices)):
    start = match_indices[i-1] + 1
    end = match_indices[i]
    captured_text.append(my_list[start:end])
print(captured_text)
# captured_text = [
#    ['capture1', 'capture2', 'capture3', '.........'],
#    ['captureA', 'captureB', 'captureC']
# ]

使用枚举在字符串元素列表的定义 re.match 间隔之间提取正则表达式

Extracting a Regex between defined re.match intervals of a list of string elements using enumerate

python

list

enumerate