CODEWITHSUNDEEP
pythonpython-3.x
Liam Carrahar
Liam Carrahar

Reputation: 11

Attempt to encrypt a text file causes a TypeError

Below is my code:

my_text= F = open("mytext.txt")
KEY=4
encoded= ""

for c in my_text:
    rem = (ord(c) - 97 + KEY) % 26
    encoded += chr(rem + 97)

print(encoded)

Error:

TypeError: ord() expected a character, but string of length 21 found

It returns the error above but I don't know how to solve it.

Upvotes: 1

Views: 48

Answers (2)

martineau
martineau

Reputation: 123423

Iterating over a file retrieves the data line-by-line by default. You can read the file in as a stream of bytes using the two-argument from of the iter(callable, sentinel) built-in function as shown below. Note this approach will not read the entire file into memory all-at-once like what would happen using something like the readlines() built-in. 

KEY = 4
encoded = ""

with open("mytext.txt", 'rb') as my_text:
    # Using iter() like below causes it to quit when read() returns an
    # empty char string (which indicates the end of the file has been
    # reached).
    for c in iter(lambda: my_text.read(1), b''):
        rem = (ord(c) - 97 + KEY) % 26
        encoded += chr(rem + 97)

print(encoded)

Upvotes: 1

Pawnesh Kumar
Pawnesh Kumar

Reputation: 494

you have to use readlines and do other loop for any new line in the text file. otherwise single line will be good.

my_text= F = open("mytext.txt")
my_text = F.readlines()
KEY = 4 
encoded= ""
for c in my_text:
    for c1 in c:
        rem = (ord(c1) - 97 + KEY) % 26 
        encoded += chr(rem + 97)

print(encoded)

Upvotes: 0

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