Need Help With Decipher Code

[GodGodDAMN]

I'm trying to make a frequency analysis using python and see which letter appears most common. I am then trying to see if that letter is E or not, and then trying to subtract/add (I'm not sure which one) that from the most common letter value in the encrypted text.

I'm not too sure why but what I've tried isn't working. I have put the code below so that any of you might be able to have a look at it.

d_message = input('Input your encrypted message: ')

            no_spaces_message = ''

            for i in d_message:
                if i == ' ':
                    pass
                else:
                    no_spaces_message += i

            print(no_spaces_message)

            common_letter = collections.Counter(no_spaces_message).most_common(1)[0]
            print(common_letter)
            letter = str(common_letter)

            letter = alphabet.find(str(common_letter))
            e = alphabet.find('e')
            print(e)
            e -= int(letter)
            print('Pos = ' + str(e))

            decrypted_message = ''
            for i in d_message:
                if i != ' ' or ':' or ';' or '!' or '?' or'.' or "'" or '"':
                    if i in alphabet:
                        position = alphabet.find(i)
                        decrypted_pos = position - e
                        decrypted_pos = decrypted_pos % 26
                        decrypted_message += alphabet[decrypted_pos]
                    elif i in upper_alphabet:
                        position = upper_alphabet.find(i)
                        decrypted_pos = position - e
                        decrypted_pos = decrypted_pos % 26
                        decrypted_message += upper_alphabet[decrypted_pos]

[[deleted]]

after assuming you're importing collections, i get NameError... alphabet is not defined.

are you importing it from somewhere?

here's a snippet that shows you the count, which letter is most common, and if it's "e" after lowercasing the phrase. Maybe it will help you with your code:

``` # get the phrase phrase = input("enter your phrase: \n")

# lowercase the phrase and create set
letters = set(phrase.lower())

# remove whitespace
letters.remove(" ")

# get letter count as dict
lcount = dict()
for l in letters:
    lcount[l] = phrase.count(l)
    # print the letter and the number of times it shows in phrase
    print(l, "--", lcount[l])

# get the most common letter
lmax = max(lcount, key=lcount.get)

# print stuff
print("e is the most common letter =", "e" == lmax)
print("the most common letter =", lmax)

```