[Python] Trying to convert int to string without using in-built function in python 3

def int_to_str(num):
is_negative = False
if num:
num, is_negative = -num, True
s = []
while True:
s.append(chr(ord('0') + num % 10))
num //= 10
if num == 0:
break
return ('-' if is_negative else '') + ''.join(reversed(s))
num = input("Enter any numeric value: ")
print(int_to_str(num))

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