def psn():
    f_in = open('in.csv', 'r')
    obj = re.sub(str(''),str(''),f_in.read())
    f_in.close()

  
>>> import re
>>> 
>>> s = 'Text \n abc \n text.'
>>> 
>>> out = re.sub(r'\n abc \n', r'', s)
>>> out
'Text  text.'
>>>