Python Forum

Hi all,

super new to python and working on a text to binary convertor using a dictionary, and wanting to understand how I get back to text after I have the binary output.

I currently have this;

def to_text_code(text):
    code = {'a':'01100001','b':'01100010','c':'01100011}

    text_code = ""

    for x in text:
        text_code += code[x.lower()]
    return text_code

text = input("Text to Binary Converter: ")
print(to_text_code(text))

It seems to work for the letters that I have placed in my dictionary and I can have multiple entries. However, when reversing the dictionary to go from binary back to text I'm having lots of issues.

Any help would be great,

thanks,

G

What exactly is your problem? Having difficulties of splitting an array of bits into bytes? Try this:

sub split_bitrange_in_bytes(string_with_bits)
    for bitcounter in range(0, len(string_with_bits), 8):
        print(string_with_bits[bitcounter:bitcounter + 8])

(Feb-04-2020, 07:00 PM)ibreeden Wrote: [ -> ]However, when reversing the dictionary to go from binary back to text I'm having lots of issues.

You really don't need to make this dictionary(a lot of job for all characters ) as Python has tool build in for convert.
When you have the dictionary can look at doing it both ways as a exercise.

def to_text_code(text):
    code = {
        "a": "01100001",
        "b": "01100010",
        "c": "01100011",
    }
    if text.isalpha():
        return code.get(text, f'No record for <{text}>')
    else:
        rev = {v: k for k, v in code.items()}
        return rev.get(text, f'No record for <{text}>')

lst = ['a', '01100001', 'b', "01100010"]
for text in lst:
    print(to_text_code(text)

Output:
01100001
a
01100010
b

Convert back and forth,can try to make function using this.

>>> c = 'a'
>>> c = f"{ord(c):08b}"
>>> c
'01100001'
>>> 
>>> chr(int(c, 2))
'a'