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Capturing group with findall?
>>> re.findall('abc(de)fg(123)', 'abcdefg123 and again abcdefg123')
[('de', '123'), ('de', '123')]

>>> re.findall('(1(23))45', '12345')
[('123', '23')]

>>> re.findall('(1(23)45)', '12345')
[('12345', '23')]

>>> import re
>>> r = re.compile(r"'(d+)'")
>>> result = r.findall("'1', '2', '345'")
>>> result
['1', '2', '345']
>>> result[0]
'1'
>>> for item in result:
...     print(item)
...
1
2
345
>>>