[Tutor] characters in python

[Gigs_]

here is the code:
def changer():
"""Changer from Serbian to Croatian for this letters: æ, è, ð in ć, č, đ
"""
whatfile = raw_input('Enter location of your file: ')

# open and read file
ofile = open(whatfile, 'r')
S = ofile.read()
ofile.close()

# search file and replace æ, è in ć, č
for i in S:
S = S.replace('æ', 'ć')
S = S.replace('è', 'č')
S = S.replace('ð', 'đ')

# open and write to file
infile = open(whatfile, 'w')
infile.write(S)
infile.close()


I attached file too.
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