python - Trouble in regular expression -

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matching g in 'reference: g. ' using regular expression

i tried using error still occur

refresidue = re.compiler(r'(s/reference: \ //n)')

any other suggestions i'm quite new in this. appreciated.

'reference: g. ' reference can either a,c,g or t

i'm sorry confusion - have output prints out characters (a,c,g,t) instead of reference: .

this code

refresidue = re.compiler(r'(s/reference: \ //n)')

a_matchref = refresidue.search(row[2])

if a_matchref not none:

   a_matchref = a_matchref.group(1)

you're mixing regex syntax javascript (or other regex flavor) , python; , regex quite strange. also, re.compile() compiles regex, doesn't match anything.

assuming want match single alphanumeric character after text reference:, try following:

refresidue = re.search(r"reference:\s*(\w)", your_text_to_be_matched).group(1)

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