🔒 Python Cryptography Project Help

[finite summit]

I need help w a python project consisting of encrypting and decrypting a file using ceaser cipher.

I have the text files that I need to derypt/encrypt w python ceaser cipher.

[hoary field]

@finite summit

Python help channel opened

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[finite summit]

snippet

[modest river]

Do you have any specific questions?

Questions are more productive than a general "help" request.

[rocky shard]

!d str.translate - look into str.translate()

[hoary field]

str.translate

str.translate(table)```
Return a copy of the string in which each character has been mapped through the given translation table. The table must be an object that implements indexing via [`__getitem__()`](https://docs.python.org/3/reference/datamodel.html#object.__getitem__), typically a [mapping](https://docs.python.org/3/glossary.html#term-mapping) or [sequence](https://docs.python.org/3/glossary.html#term-sequence). When indexed by a Unicode ordinal (an integer), the table object can do any of the following: return a Unicode ordinal or a string, to map the character to one or more other characters; return `None`, to delete the character from the return string; or raise a [`LookupError`](https://docs.python.org/3/library/exceptions.html#LookupError) exception, to map the character to itself.

You can use [`str.maketrans()`](https://docs.python.org/3/library/stdtypes.html#str.maketrans) to create a translation map from character-to-character mappings in different formats.

See also the [`codecs`](https://docs.python.org/3/library/codecs.html#module-codecs) module for a more flexible approach to custom character mappings.

[rocky shard]

!d string.ascii_lowercase

[hoary field]

string.ascii\_lowercase

string.ascii_lowercase```
The lowercase letters `'abcdefghijklmnopqrstuvwxyz'`. This value is not locale-dependent and will not change.

[fierce oyster]

!d string.ascii_uppercase

[hoary field]

string.ascii\_uppercase

string.ascii_uppercase```
The uppercase letters `'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`. This value is not locale-dependent and will not change.

[fierce oyster]

maybe this on in this speciffic assignment
but yeah, but they are kind of the same

[finite summit]

i need someone to encrypt

[modest river]

!rule homework

[hoary field]

Rules

8. Do not help with ongoing exams. When helping with homework, help people learn how to do the assignment without doing it for them.

[finite summit]

also no short hand functions

[warm haven]

Show the code you have so far

[finite summit]

def caesar_encrypt_file(input_filename, output_filename, key):
alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
encrypted_lines = []

infile = open(input_filename, 'r')
lines = infile.readlines()
infile.close()

for line in lines:
    encrypted_line = ''
    for char in line:
        if char in alphabet:
            index = alphabet.index(char)
            new_index = (index + key) % 26
            encrypted_line += alphabet[new_index]
        else:
            encrypted_line += char  # Preserve spaces and newlines
    encrypted_lines.append(encrypted_line)

outfile = open(output_filename, 'w')
outfile.writelines(encrypted_lines)
outfile.close()

[hoary field]

Hey @finite summit!

Please edit your message to use a code block

```py
print('Hello, world!')
```

This will result in the following:

print('Hello, world!')```

[modest river]

Does it not work?

[finite summit]

well i want someone to check yk

and i dont understand what im supposed to submit

and how my file organiation should be

[modest river]

Create an encrypted file with the message "THERE IS A PLOT AGAINST YOU I CAN HELP"

Sounds like you need to input() for the input/output filename and the key

then call your function.

[finite summit]

oh ic

dude you really are smart man tysm

[hoary field]

Python help channel closed for inactivity

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