python - re.sub issue when using group with \number -

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i'm trying use regexp arrange text, re.sub.

let's it's csv file have clean make totally csv.

i replaced \t \n doing :

t = t.replace("\n", "\t")

... , works fine. after that, need \t \n, each of csv lines. use expression : 

t = re.sub("\t(\d*?);", "\n\1;", t, re.u)

the problem works... partially. \n added properly, instead of being followed matching group, followed ^a (according vim)

i tried regexp using re.findall , works juste fine... wrong according ?

my csv lines supposed :

number;text;text;...;...;\n

thanks !

your \1 interpreted ascii character 1. try using \\1 or r"\n\1;" .


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