what am I doing wrong in regular expressions?-CodePudding

please tell me what I'm doing wrong, I need to get the value

here is the part of the code that is responsible for:

my code:

dict_miner['model'] = re.search(r'SN: (\w )', date.get('Name'))

result:

'model': <re.Match object; span=(14, 21), match='sn: abc123456'>

but I need the value of match to be written to the variable:

my code:

dict_miner['model'] = re.search(r'SN: (\w ).group(1)', date.get('Name'))

result:

'model': None,

as a result , why doesn 't it work .group(1)?

result = 'model': abc123456

or should I throw off the entire code ?

CodePudding user response：

The group(1) invocation is Python code, not part of the regexp.

dict_miner['model'] = re.search(r'SN: (\w )', date.get('Name')).group(1)

Note that this will happily crash if the data does not match; then re.search would return None, and you can't call group on None. You will need to do this in two steps, like so, to take care of that.

name_match = re.search(r'SN: (\w )', date.get('Name'))
dict_miner['model'] = (name_match.group(1) if name_match else None)