Python Regx gives none answer-CodePudding

I wanted to extract PAN from the message

PAN=re.compile(r"[a-zA-Z]{5}[0-9]{4}[a-zA-Z]")
mes="ITR for AY 2019-20 for PAN: apzxxxxx9g has been processed at CPC"
abc=PAN.search(mes)
print(abc)

output: None

CodePudding user response：

Assuming you want to extract xxxxx9g, you use 4 repetitions of the number, which cannot yield a correct match.

You can change it to 1 to 4 numbers ([0-9]{1,4}):

PAN=re.compile(r'[a-zA-Z]{5}[0-9]{1,4}[a-zA-Z]')
mes="ITR for AY 2019-20 for PAN: apzxxxxx9g has been processed at CPC"
abc=PAN.search(mes)
print(abc)

output: <re.Match object; span=(31, 38), match='xxxxx9g'>

>>> print(abc.group())
xxxxx9g

CodePudding user response：

Your regex is looking for five alphabetic characters, followed by four digits, followed by one alphabetic. Nothing in your string matches (apzxxxxx9g is close, but exactly three of the xs immediately preceding 9 would need to be digits). Either your input needs to change, or your regex does.