TypeError: string indices must be integers inpython

Question

here is my code:

import time

ed = input('Encrypt (e) or decrypt (d)? ')

chars = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ "
charsLen = len(chars)

def numberToStr(num):
    s = ""
    while num:
        s = chars[num % charsLen] + s
        num //= charsLen

    return(s)
def strToNumber(numStr):
    num = 0
    for i, c in enumerate(reversed(numStr)):
        num += chars.index(c) * (charsLen ** i)

    return(num)

def enc():
    key = input('What is your key? (Alphanumeric and space) ')
    ID = int(input('What is your ID? (0-9, 3+ digits) '))
    inp = int(strToNumber(input('What do you want to encrypt? ')))
    keyAsNum = int(strToNumber(key))
    enc.asint = inp ** 2
    enc.asint = enc.asint * ID
    enc.asint = enc.asint - keyAsNum
    enc.astext = numberToStr(int(enc.asint))
    return(enc)


def dec():
    key = input('What is your key? (Alphanumeric and space) ')
    ID = int(input('What is your ID? (0-9, 3+ digits) '))
    inp = int(strToNumber(input('What do you want to decrypt? ')))
    keyAsNum = int(strToNumber(key))
    message = inp + keyAsNum
    message = message // ID
    message = math.sqrt(message)
    message = numberToStr(message)
    return(message)

if ed=='e':
    crypt = enc()
    print('crypt.asint:\n' + str(crypt.asint) + '\ncrypt.astext:\n' + crypt.astext)
elif ed=='d':
    crypt = dec()
    print(crypt)

time.sleep(10)

and here is the error: File "stdin", line 5, in module

File "stdin", line 9, in dec

File "stdin", line 4, in numberToStr

TypeError: string indices must be integers

I cannot figure out why it is throwing this error and cannot find anything on google.

Even if, for whatever reason, that question doesn’t appear at all, there are pages and pages of relevant information. Did you not find any of that information? — AMC
– AMC, Commented Mar 14, 2020 at 3:47

FiddleStix · Accepted Answer · 2020-03-13 18:00:04Z

2

The traceback tells you exactly what is wrong. You are doing

s = chars[num % charsLen] + s

but you don't know for sure that num is an int because, previously, you do:

message = math.sqrt(message)
message = numberToStr(message)

What type does math.sqrt return?

answered Mar 13, 2020 at 18:00

FiddleStix

3,90123 silver badges22 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

okaeiz · Accepted Answer · 2024-09-18 11:29:10Z

0

Well, I am a little bit confused by how you're using the square root function. When I run this:

from math import sqrt
type(sqrt(7)) #I want to recognize the type of what sqrt returns

it returns:

<class 'float'>

So that makes sense if you're trying to index your chars using a non-int value.

answered Sep 18, 2024 at 11:29

okaeiz

4185 silver badges17 bronze badges

Collectives™ on Stack Overflow

TypeError: string indices must be integers inpython

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related