Manipulating files Python 2.7

[hugobaur]

Hi, i can't make this work. I use your code to read my file, works:

# read in the file contents
iso = open('E:/ENEL/Modelos/NW201610/DGER.dat').read()
utf = open('E:/ENEL/Modelos/NW201610/DGER.dat').read()

# this is how they look, one <str> character for each byte in the source file
print 'ISO:', repr(iso)
print 'UTF:', repr(utf)

# transform them to unicode, specifying the appropriate encoding
unicodeISO = unicode(iso, encoding='iso-8859-15')
#unicodeUTF = unicode(utf, encoding='UTF-8')

# Now, as unicode strings, they are identical
print repr(unicodeISO), unicodeISO
#print repr(unicodeUTF), unicodeUTF

But my original function does not work:

def dger_ano(FILE_ORIGEM, FILE_DATE, ORIGEM, DESTINO): #ORIGEM: ../file.txt | DESTINO: ../../
   cache = None
   string = "YEAR " + FILE_ORIGEM  
   with open(ORIGEM , "r") as f: cache = f.read()
   unicodeISO = unicode(cache, encoding='iso-8859-15')

   print ('ISO:', repr(unicodeISO))
   new_file = re.sub(string, "ANO INICIO DO ESTUDO {}".format(FILE_DATE), cache)
   if new_file:
       with open(DESTINO + "/temporario.txt", "w") as unicodeISO: unicodeISO.write(new_file)
   os.remove(DESTINO + "/DGER.dat")
   os.rename(DESTINO + '/temporario.txt',DESTINO + '/DGER.dat')

Edit adim:
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