Python - Reverse a string without using built in functions to manipulate string

Just for fun. Reversing a string in the non pythonic way.

class MakeBackwardString:

def __init__(self, mystring):

self.mystring = mystring

def reverse(self) -> str: # reverse using loop

BACKWARD_STRING = "" # b will hold the reversed string

if isinstance(self.mystring, str): # checks if input is string

for i in reversed(range(0, len(self.mystring))): # iterates through the string

BACKWARD_STRING += self.mystring[i] # concats letters to b in reverse order

return BACKWARD_STRING # returns result

def reverse_capitalize(self) -> str:

return self.reverse().capitalize()

def reverse_title(self) -> str:

return self.reverse().title()

def reverse_lower(self) -> str:

return self.reverse().lower()

def reverse_upper(self) -> str:

return self.reverse().upper()

def reverse_using_list(self) -> str: # reverse using list

return ''.join(list(self.mystring)[::-1])

obj = MakeBackwardString("This is a string")

print(obj.reverse())

print(obj.reverse_capitalize())

print(obj.reverse_title())

print(obj.reverse_lower())

print(obj.reverse_upper())

print(obj.reverse_using_list())

Output
gnirts a si sihT
Gnirts a si siht
Gnirts A Si Siht
gnirts a si siht
GNIRTS A SI SIHT
gnirts a si sihT