Manipulating files Python 2.7

[hugobaur]

Thanks to the tips. I thought like you, my dificulty it's the python. So, i'm create a program and works. Thanks awnser me!

def dger_ano(FILE_DATE, ORIGEM, DESTINO):
    cache = None
    string = "ANO INICIO DO ESTUDO 2016"  #str(int(FILE_DATE) - 1)
    with open(ORIGEM , "r") as f: cache = f.read()
    new_file = re.sub(string, "ANO INICIO DO ESTUDO {}".format(FILE_DATE), cache)
    if new_file:
        with open(DESTINO + "/temporario.txt", "w") as f: f.write(new_file)
    os.remove(DESTINO + "/DGER.dat")
    os.rename(DESTINO + '/temporario.txt',DESTINO + '/DGER.dat')

In Python 2 : has the accent on the file appears this error message, "UnicodeDecodeError: 'ascii' codec can't decode byte 0xba in position 1355: ordinal not in range(128) "
Python 3 : Works!

BUT, i need to work on Python 2