Python从双引号中提取单引号

Question

我有一个这样的文本列表：

"DATA - Critical/Major DATA Alerts to 'DATA NM Escalation'"
"DATA - Critical/Major DATA Alerts to 'DATA NM Escalation'"
'DATA - SOM THIN Escalation'
'DATA - SOM THIN HEARTBEAT Escalation'
"DATA - Critical/Major DATA Alerts to 'DATA NM Escalation'"
"DATA - Critical/Major DATA Alerts to 'DATA NM Escalation'"
"DATA - Critical/Major DATA Alerts to 'DATA NM Escalation'"

我想从""中提取字符串的''部分。做这件事最好的方法是什么？'和"有什么区别？正如您所看到的，一些原始文本显示为'，而另一些则具有"包装器。

Answer 1

我有一些东西是有效的，欢迎改进：

for rule in rules:
    print(rule)
    name = re.findall("'(.*)'", rule)
    if name:
        print(name[0])
    else:
        print(rule)

输出类似于：(第一行输入，第二行输出。)

"DATA  - Critical/Major DATA Alerts to 'DATA  NM Escalation'"
'DATA  NM Escalation'
"DATA  - Critical/Major DATA Alerts to 'DATA  NM Escalation'"
'DATA  NM Escalation'
"DATA  - Critical/Major DATA DATA Alerts to 'DATA  NM Escalation'"
'DATA  NM Escalation'
"DATA  - Critical/Major DATA DATA Alerts to 'DATA  NM Escalation'"
'DATA  NM Escalation'
'DATA - SOM THIN Escalation'
'DATA - SOM THIN Escalation'
'DATA - SOM THIN HEARTBEAT Escalation'
'DATA - SOM THIN HEARTBEAT Escalation'
"DATA - Critical/Major DATA DATA Alerts to 'DATA NM Escalation'"
'DATA NM Escalation'
"DATA - Critical/Major DATA DATA Alerts to 'DATA NM Escalation'"
'DATA NM Escalation'

Answer 2

不使用RegEx：

lst = ["DATA - Critical/Major DATA Alerts to 'DATA NM Escalation'",
       "DATA - Critical/Major DATA Alerts to 'DATA NM Escalation'",
       'DATA - SOM THIN Escalation', 
       'DATA - SOM THIN HEARTBEAT Escalation',
       "DATA - Critical/Major DATA Alerts to 'DATA NM Escalation'",
       "DATA - Critical/Major DATA Alerts to 'DATA NM Escalation'",
       "DATA - Critical/Major DATA Alerts to 'DATA NM Escalation'"]

for element in lst:
    start_idx = element.find('\'')
    if start_idx == -1:
        start_idx = 0
    end_idx = element.find('\'', start_idx+1, len(element))
    if end_idx == -1:
        end_idx = len(element)
        print(element[start_idx:end_idx])
    else:
        print(element[start_idx+1:end_idx])

输出：

DATA NM Escalation
DATA NM Escalation
DATA - SOM THIN Escalation
DATA - SOM THIN HEARTBEAT Escalation
DATA NM Escalation
DATA NM Escalation
DATA NM Escalation