Why does my string of length 1 change to length 3?

I have been trying to make a compression system, but my strings keep on changing from length 1: turns to length 3 length 2: turns to length 5 length 3: turns to length 7 length 4: turns to length 9 and so on. The code is below:

text = list(
    "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYSZ#1234567890-_!@.+=$%:;^&*(){}[]\\|'\",<>/?`~\n\t "
)
import random
import pickle as pic
import itertools
import tools


class A:
  def __init__(self):
    self.wmap = {}
    self.rs = []


def save(data, code):
  try:
    with open(code + ".pickle", "wb") as f:
      pic.dump(data, f)
    return True
  except Exception as e:
    return e


def load(code):
  picklein = open(code + ".pickle", "rb")
  data = pic.load(picklein)
  return data


def makemap(text, num):
  for i in range(num[0], num[1]):
    save(a, "wmap")
    print(i)
    result=0
    for ir in itertools.permutations(text, i):
      l = ''.join(ir)
      if l not in a.wmap:
        while True:
          result=random.randint(100, 1000000)
          try:
            print(chr(result))
          except:
            continue
          if result not in a.rs and str(chr(result)) not in a.wmap and str(chr(result)) not in text and len(str(chr(result)))==1:
            a.rs.append(result)
            a.wmap.update({l:chr(result)})
            break


a = A()


def do():
  makemap(text, (0, 3))
  save(a, "wmap")
  print("Saved")


def compress(text):
  for i in a.wmap:
    x = a.wmap[i]
    text = text.replace(i, x)
  return text


def decompress(text):
  for i in a.wmap:
    x = a.wmap[i]
    text = text.replace(x, i)
    if text == i or text == x:
      break
  return text

do()
while True:
  comp=compress(input("> "))
  print(comp)
  print("Length:",len(comp))

I think the problem is in makemap(), but everything I have tried in makemap does not fix it. I have been searching for hours, but have found no answer.